Thu, 16 Jun 2022 19:19:34 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
 
Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
Thu, 16 Jun 2022 19:19:34 +0000 linkquote
Hi All
I've Just bought a px 125 disc ( engine completely rebuilt by retrospective scooters only 600 miles ago) with the eventual aim of attaching a sidecar.(inspired by Charlieman 22 although it won't be a leaner ).
Anyway to start with I intend to fit a polini box and do a bit of tuning with the standard barrel aiming for a torque monster, moving on to a kit later( vmc?).
Need a set of main jets to tune the scoot for the polini box but not sure what range I need.
Any advice would be welcomed.
Cheers Andy
Thu, 16 Jun 2022 20:38:04 +0000

Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
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Location: Tucson, AZ
 
Molto Verboso
71' Sprint Veloce , 05' Vespa PX150, 1978 P200E
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Location: Tucson, AZ
Thu, 16 Jun 2022 20:38:04 +0000 linkquote
^^ just a 125cc engine with some barrel modification and the polini box? I would run a 106-108 main jet max, your stock main jet should be in the 98-102 range. Your 125cc is going to be very underpowered with the sidecar and stockish engine. I wouldn't touch the rest of the jetting.

Once you do the 166cc-180cc ish bolt on kits you will start with at least a 115 main jet, that is what it comes with Malossi 166cc and Malossi 177cc. I had the two that I mentioned plus a Polini 177 cc and on my P series /Sprint Veloce I ran 122-125 cc along with expansion chambers or exhaust boxes.
Thu, 16 Jun 2022 21:30:25 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
 
Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
Thu, 16 Jun 2022 21:30:25 +0000 linkquote
Thanks scooterist, it gives me somewhere to start.
Tuning the 125 cylinder is just going to be for my amusement/education, looking how much torque i can get out of the 125 without splitting the cases.Then take that experience into fitting a kit
I had, a long time ago one of the first px 200 discs over here and loved it.
Why not a 200 this time? Simply this 125 came up And I couldnt turn it down given its got practically a brand new engine and the lower gearing of the 125 will help when I fit the side car.
Fri, 17 Jun 2022 12:32:33 +0000

Addicted
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Fri, 17 Jun 2022 12:32:33 +0000 linkquote
andyx wrote:
Hi All
I've Just bought a px 125 disc ( engine completely rebuilt by retrospective scooters only 600 miles ago) with the eventual aim of attaching a sidecar.(inspired by Charlieman 22 although it won't be a leaner ).
Anyway to start with I intend to fit a polini box and do a bit of tuning with the standard barrel aiming for a torque monster, moving on to a kit later( vmc?).
Need a set of main jets to tune the scoot for the polini box but not sure what range I need.
Any advice would be welcomed.
Cheers Andy
on a standard PX 125 with 20mm SI, MJ will be around 101-102 with polini box and derestricted air filter. Standard jet on 20mm is 96/98 depending on your model so go 3 or 4 over for polini box. 1 or 2 for air filter mod. Ive tried the polini box for myself and the figures above are well around the mark, scoots do differ though so have a play about.
Fri, 17 Jun 2022 13:53:43 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
 
Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
Fri, 17 Jun 2022 13:53:43 +0000 linkquote
Thanks ferris wolf, box and a set of jets are on their way, will update you all on my progress.
Any suggestions for tuning the cylinder?
I have read loads on this brill forum, but not sure which mods would get the results ( if any) I'm after i.e. torque.
Thanks again.
Fri, 17 Jun 2022 16:55:29 +0000

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Fri, 17 Jun 2022 16:55:29 +0000 linkquote
andyx wrote:
Thanks ferris wolf, box and a set of jets are on their way, will update you all on my progress.
Any suggestions for tuning the cylinder?
I have read loads on this brill forum, but not sure which mods would get the results ( if any) I'm after i.e. torque.
Thanks again.
Well I went straight to a dr177 bolt on with a 24mm carb and a road 2 pipe. You don't need the 24mm carb really . You will be hitting speeds of 60 mph plus on a gps . Mine revs out at 65mph so could go bit quicker top end with clutch cog change but quite frankly 65mph feels a bit too fast for me. Plenty of folks have provided jetting info on here for the dr 177 for both 20mm and 24 mm carb so plenty of help available. The dr kit isn't the most exciting but reliable and cheap . Been using for some time now and runs very well. I wouldn't bother with the 24mm carb unless you decide on a more racey kit, malossi vmc etc . But if you're just look at modding your existing barrel head there are guys on here will be in the know to tell you where to use your dremel tool and adjusting timing etc . However on a stock cylinder can't help thinking your gains will be very small for a lot of faff when you could just got for a big bore kit. It's then you could port it etc and turn it into a power house. Good luck mate
Fri, 17 Jun 2022 18:16:31 +0000

Ossessionato
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 61 Ser 2, 65 Silver Special, 90 V5N 50, 01 ET2, 2015 HD Road Glide Special
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Ossessionato
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 61 Ser 2, 65 Silver Special, 90 V5N 50, 01 ET2, 2015 HD Road Glide Special
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Fri, 17 Jun 2022 18:16:31 +0000 linkquote
As long as there's a fixed sidecar attached, you won't be racing around anywhere! They're fun as hell to ride but you have to lower your expectations. Think tractor more than scooter.

Don't bother with the 125 cylinder, buy a kit with some low end grunt (Pinasco, Polini).

Look into gearing change for torque, not high speeds. Gotta get that mass moving from a standstill.

I rode once with an old user on here and he could maybe top out at 55 with a slightly modified 200 motor on his sidecar hack. He'd have to slow way down for turns and then would rev out of it hard to catch back up.
Fri, 17 Jun 2022 19:48:15 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
 
Hooked
px 125 disc
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Location: Essex, GB
Fri, 17 Jun 2022 19:48:15 +0000 linkquote
Sounds like fun, ( i know everybody thinks im nuts) but two reasons for the sidecar, 1 ive never driven one and at the tender age of 66 i want to complete my vehicle education and
2 one of my grand daughters is disabled but loves motors and the sidecar is the only way to go.
I understand that kitting is the only way to go eventually but I'd like to have a go at tuning the 125 more for experience than anything else so what can I do to the std motor for more torque, then i'll be back to find out which kit is going to give me torquiest machine.
Fri, 17 Jun 2022 21:07:41 +0000

Ossessionato
2007 Stella 225
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2007 Stella 225
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Fri, 17 Jun 2022 21:07:41 +0000 linkquote
andyx wrote:
Sounds like fun, ( i know everybody thinks im nuts) but two reasons for the sidecar, 1 ive never driven one and at the tender age of 66 i want to complete my vehicle education and
2 one of my grand daughters is disabled but loves motors and the sidecar is the only way to go.
I understand that kitting is the only way to go eventually but I'd like to have a go at tuning the 125 more for experience than anything else so what can I do to the std motor for more torque, then i'll be back to find out which kit is going to give me torquiest machine.
Look up "O Tuning" short for original tuning.
Fri, 17 Jun 2022 21:49:15 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
 
Hooked
px 125 disc
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Fri, 17 Jun 2022 21:49:15 +0000 linkquote
Thanks for the suggestion Christopher, I'll have a look.
Ive just read an article in scootering classics (Oct 2017 issue) which seems to be good for what I'm aiming at but any more ideas would be very much appreciated.
Sat, 18 Jun 2022 10:08:04 +0000

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Sat, 18 Jun 2022 10:08:04 +0000 linkquote
Well one thing for sure Is the polini box will give you more torque. I run one with my kit and it pulls like a train 40-50 mph region then tops out at less than 60mph. The road 2 pipe far more top speed but polini around urban roads is great and good for inclines too.
Sat, 18 Jun 2022 11:18:27 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
 
Hooked
px 125 disc
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Location: Essex, GB
Sat, 18 Jun 2022 11:18:27 +0000 linkquote
Can I ask,Feriswolf, what kit you have on your scoot, planning ahead as to what direction I'll be going going in later re cylinders, quite like the look of the vmc stevio but as always open to suggestions from all you knowledgeable folk.
Sat, 18 Jun 2022 13:14:49 +0000

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Sat, 18 Jun 2022 13:14:49 +0000 linkquote
andyx wrote:
Can I ask,Feriswolf, what kit you have on your scoot, planning ahead as to what direction I'll be going going in later re cylinders, quite like the look of the vmc stevio but as always open to suggestions from all you knowledgeable folk.
. Already stated previous posts Andy. Kitting is a whole matter of personal taste and how much you can afford and you will get fuddled by the amount of suggestions you will get, kit a is better than kit b etc . My kit is mild compared to the newer tech but it drives pretty much like an original p200. You could spend 400 to 500 quid on a DR177 setup or 2-3k if not more with some of the fabulous new engineering tech out there. It all adds up because when you start sticking barrel kit on you then have to look at engine renovation , gaskets , seals, clutch , crank, ignition, carb, exhaust , bearings, jet kits, labour costs maybe if you need help. So consider this in your choices. Mine is a dr177 , 24mm si carb, road 2 sip exhaust, derestricted air filter, all that's about 440.00 quid then you got postage costs , things like jet kits , air correctors etc , has a cosa clutch as standard as it's the 2003 MY model. As I say it all adds up and that's the most basic kit setup you can choose. Is your engine in need of refurb to take extra power etc as if you have underlying issues a kit will soon reveal them. More Cost.
Sat, 18 Jun 2022 17:33:05 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
 
Hooked
px 125 disc
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Location: Essex, GB
Sat, 18 Jun 2022 17:33:05 +0000 linkquote
Engine was totally rebuilt 600 miles ago by Retrospective scooters, So the engine is good to go. Intend fitting a kit down the road simply to power a sidecar. Tuning the 125 cylinder is simply for my pleasure and to learn about tuning and jetting before I take the plunge.
My plan is to go plug and play initially and want to find out the consensus of opinion on the best kit for torque.
Mine is a 2003 disc model and the clutch is brand new as part of the above rebuild along with practically everything else including a new crank, so is a good basis for kitting when I'm ready.

Thank you for your time and input its very valuable.
Sat, 18 Jun 2022 17:42:34 +0000

Hooked
px 125 disc
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Location: Essex, GB
 
Hooked
px 125 disc
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Location: Essex, GB
Sat, 18 Jun 2022 17:42:34 +0000 linkquote
Just found/read your thread re your build, Did you try the polinl head and up gear?
If so was it worthwhile?
Sun, 19 Jun 2022 04:04:49 +0000

Ossessionato
62 VBB1T Round Tail W/ leaner sidecar
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62 VBB1T Round Tail W/ leaner sidecar
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Sun, 19 Jun 2022 04:04:49 +0000 linkquote
Andy - couple thoughts from a fellow sidecar enthusiast...
First - boys over at Retrospective know their stuff - so expect the bottom is is solid.
No reason to split cases - cylinder will be plug and play.
Perhaps that was already clear.

On cylinders - thump is good - when pulling a sidecar up the A502.
From a bang for buck - you are on the right track.
Cylinder kit and exhaust are by far the biggest - especially in combo.
Given you are starting with a 125 - that cylinder will be a game changer.

There was a time where the options were:
1. Improved iron cylinders like Polini
2. High end nikasil lined cylinders like Malossi
3. Cheaply made, big tolerance, fairly low quality options like DR.

While #2, remains - number 1 and 3 merged - to our benefit.
Today you can pick up either a BGM (German made, tight tolerance, great for your application) or VMC (little cheaper - little more variation from product to product).
Both are aluminum cylinders with the nicasil liner.

Why do you want a nikasil lined cylinder?
Well - cause they are much less likely to seize.
They take heat better and...
Seizing is, well, really unpleasant...

Have a look at those two.
Plug and play - I would probably grab the BGM (which I have done myself in the past).
You will be knocked out in comparison to what you are running now.
Reliable and solid.
Sun, 19 Jun 2022 12:14:25 +0000

Ossessionato
2007 Stella 225
Joined: Sat, 02 Nov 2019 20:44:07 +0000
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Location: Rochester, Minnesota
 
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2007 Stella 225
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Location: Rochester, Minnesota
Sun, 19 Jun 2022 12:14:25 +0000 linkquote
andyx wrote:
Just found/read your thread re your build, Did you try the polinl head and up gear?
If so was it worthwhile?
Personally wouldn't spend money on that head, unless you just want to try it. If you're going that far, have it that far apart put a new cylinder on, just to close.
Sun, 19 Jun 2022 12:16:54 +0000

Ossessionato
2007 Stella 225
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Location: Rochester, Minnesota
 
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2007 Stella 225
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Sun, 19 Jun 2022 12:16:54 +0000 linkquote
charlieman22 wrote:
Andy - couple thoughts from a fellow sidecar enthusiast...
First - boys over at Retrospective know their stuff - so expect the bottom is is solid.
No reason to split cases - cylinder will be plug and play.
Perhaps that was already clear.

On cylinders - thump is good - when pulling a sidecar up the A502.
From a bang for buck - you are on the right track.
Cylinder kit and exhaust are by far the biggest - especially in combo.
Given you are starting with a 125 - that cylinder will be a game changer.

There was a time where the options were:
1. Improved iron cylinders like Polini
2. High end nikasil lined cylinders like Malossi
3. Cheaply made, big tolerance, fairly low quality options like DR.

While #2, remains - number 1 and 3 merged - to our benefit.
Today you can pick up either a BGM (German made, tight tolerance, great for your application) or VMC (little cheaper - little more variation from product to product).
Both are aluminum cylinders with the nicasil liner.

Why do you want a nikasil lined cylinder?
Well - cause they are much less likely to seize.
They take heat better and...
Seizing is, well, really unpleasant...

Have a look at those two.
Plug and play - I would probably grab the BGM (which I have done myself in the past).
You will be knocked out in comparison to what you are running now.
Reliable and solid.
Doesn't the BGM have an advantage with an inset head to adjust squish?

https://www.scooter-center.com/en/cylinder-bgm-pro-177/187-cc-vespa-px125-px150-cosa125-cosa150-gtr125-ts125-sprint-veloce-vlb1t-0150001-lml-star-125/150-stella-125/150-bgm1770n
Sun, 19 Jun 2022 12:51:34 +0000

Molto Verboso
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Molto Verboso
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Sun, 19 Jun 2022 12:51:34 +0000 linkquote
charlieman22 wrote:
either a BGM (German made. . . . )
gotta ask where you found that out? I would be real surprised if it's made in Germany.
Sun, 19 Jun 2022 13:13:17 +0000

Ossessionato
1979 P150X, 1983 P200E, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
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Ossessionato
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Sun, 19 Jun 2022 13:13:17 +0000 linkquote
Asian made most probably…
Sun, 19 Jun 2022 14:30:39 +0000

Ossessionato
62 VBB1T Round Tail W/ leaner sidecar
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Sun, 19 Jun 2022 14:30:39 +0000 linkquote
Stand corrected.
German sold...
They have a point.
However - general view and my experience match: quality of the product is solid, tolerances tight to what they claim.
Very torquey - and as Christopher notes - comes with a drop in head.

I agree with Christopher regarding the head.
You will likely have no perceptible improvement.
Kit comes with a new head - nice one in both cases (VMC or BMC).
Going from 125 to 177 displacement will have the largest effect.
Keep us posted.
Sun, 19 Jun 2022 14:43:31 +0000

Hooked
px 125 disc
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Location: Essex, GB
 
Hooked
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Location: Essex, GB
Sun, 19 Jun 2022 14:43:31 +0000 linkquote
Thank you all for your input, its much appreciated,
First up, fit the polini box exhaust and set that up right, going to do a little tuning on the standard cylinder just to practice working on a 2 stroke,.
Going to go with the scooter classics article as a basis, raise the barrel, skim the head, a little work on the exhaust port, (slightly wider, 1mm each side and a 1mm raise) then practise jetting it so that when I come to the kit I have half an idea what im up to.
If I knacker the std cylinder on the way then gives me an excuse to get the kit a little earlier.
Will definately keep you updated because I'm gonna need some hand holding during all of this.
And Charlieman, if I ever win the lottery I'm paying you to build me a leaner
Sun, 19 Jun 2022 14:56:05 +0000

Ossessionato
2007 Stella 225
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Location: Rochester, Minnesota
 
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Sun, 19 Jun 2022 14:56:05 +0000 linkquote
andyx wrote:
Thank you all for your input, its much appreciated,
First up, fit the polini box exhaust and set that up right, going to do a little tuning on the standard cylinder just to practice working on a 2 stroke,.
Going to go with the scooter classics article as a basis, raise the barrel, skim the head, a little work on the exhaust port, (slightly wider, 1mm each side and a 1mm raise) then practise jetting it so that when I come to the kit I have half an idea what im up to.
If I knacker the std cylinder on the way then gives me an excuse to get the kit a little earlier.
Will definately keep you updated because I'm gonna need some hand holding during all of this.
And Charlieman, if I ever win the lottery I'm paying you to build me a leaner
Unless you have a local source setup to skim a head already, I was looking at $100 -$150 to get one skimmed. About an hour of time to get head fixtured level. One reason I went to a center mount plug. Machine shop can fixture it on my piston stop and take some off using a lathe.

You can get cylinder skimmed also. Shop can clamp on base for centering and level or put it in a lathe and take some off.

Check around maybe someone has a good 150 cylinder and piston laying around that just needs rings. Maybe someone has a DR177 or something laying around you could get cheap.

You can hand lap material off head using wet and dry sandpaper and a piece of glass to keep things flat.
Sun, 19 Jun 2022 15:40:24 +0000

Hooked
px 125 disc
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Location: Essex, GB
 
Hooked
px 125 disc
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Location: Essex, GB
Sun, 19 Jun 2022 15:40:24 +0000 linkquote
Christopher_55934 wrote:
Unless you have a local source setup to skim a head already, I was looking at $100 -$150 to get one skimmed. About an hour of time to get head fixtured level. One reason I went to a center mount plug. Machine shop can fixture it on my piston stop and take some off using a lathe.

You can get cylinder skimmed also. Shop can clamp on base for centering and level or put it in a lathe and take some off.

Check around maybe someone has a good 150 cylinder and piston laying around that just needs rings. Maybe someone has a DR177 or something laying around you could get cheap.

You can hand lap material off head using wet and dry sandpaper and a piece of glass to keep things flat.


I have a guy who runs a local garage who normally does car stuff ( he skimmed an old landrover head to raise its compression for an lpg conversion I was running and also modified some mobility scooter stuff for me to fit into a childs car I built) so he's well use to me popping in with unusual requests but if the skim is too expensive then the kit idea will be brought forward.
Not too worried about money as this project will be staying with me until the kids get it in my will. , but on the other hand I do like getting my moneys worth (who said tight git) and I like working on vehicles and getting the hands dirty so modifying stuff although new for me on a 2 stroke is something I'm looking forward to.

Sun, 19 Jun 2022 20:42:02 +0000

Molto Verboso
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Sun, 19 Jun 2022 20:42:02 +0000 linkquote
charlieman22 wrote:
Stand corrected.
German sold...

sure. to be fair, everything from Scooter-Center and SIP is German sold.

I think what you meant to say is German designed.
Sun, 19 Jun 2022 21:58:53 +0000

Molto Verboso
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Sun, 19 Jun 2022 21:58:53 +0000 linkquote
SaFiS wrote:
Asian made most probably…
German-run shop in Asia.

There's a video tour somewhere. Not a dirt floor operation.
Tue, 21 Jun 2022 12:26:09 +0000

Hooked
px 125 disc
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Location: Essex, GB
 
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px 125 disc
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Tue, 21 Jun 2022 12:26:09 +0000 linkquote
Polini box is here and I'm about to fit it.
Is it worthwhile to use some exhaust joint paste in the exhaust stub or should it be fitted dry?
Tue, 21 Jun 2022 20:55:15 +0000

Hooked
px 125 disc
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Location: Essex, GB
 
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px 125 disc
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Tue, 21 Jun 2022 20:55:15 +0000 linkquote
Next problem, having troublre refitting the bolt that holds the exhaust to the bottom of the engine , the bolt just will not engage with the captive nut, any 'tricks of the trade' that will help me
Thank You.
Tue, 21 Jun 2022 21:42:22 +0000

Molto Verboso
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Tue, 21 Jun 2022 21:42:22 +0000 linkquote
andyx wrote:
Next problem, having troublre refitting the bolt that holds the exhaust to the bottom of the engine , the bolt just will not engage with the captive nut, any 'tricks of the trade' that will help me
Thank You.
Center the nut with a screwdriver and wedge a little piece of cardboard in there to keep it from dancing.
Tue, 21 Jun 2022 22:19:12 +0000

Hooked
px 125 disc
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Location: Essex, GB
 
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px 125 disc
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Location: Essex, GB
Tue, 21 Jun 2022 22:19:12 +0000 linkquote
Ray8 wrote:
Center the nut with a screwdriver and wedge a little piece of cardboard in there to keep it from dancing.
Thanks RayI've tried that , it seems to me that although the bolt is entering the nut they're at a slight angle to each otherand because the bracket is a snug fit around the boss I haven't got any wiggle room.
A couple of ideas come to mind,
1)Open out the bolt hole in the bracket and the boss to give me some rattling room and
2) open out the hole in the boss a couple of mm.
Any views on the above(' Dont be a twat' is acceptable as a comment )
Tue, 21 Jun 2022 22:23:31 +0000

Hooked
2005 Stellalossi 177 Fe
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Tue, 21 Jun 2022 22:23:31 +0000 linkquote
andyx wrote:
Next problem, having troublre refitting the bolt that holds the exhaust to the bottom of the engine , the bolt just will not engage with the captive nut, any 'tricks of the trade' that will help me
Thank You.
Do you have the rear wheel off? It is virtually impossible to line up the bolt and the nut with the rear wheel in place. Otherwise, just keep fiddling, it will go eventually.
Tue, 21 Jun 2022 22:27:23 +0000

Ossessionato
2007 Stella 225
Joined: Sat, 02 Nov 2019 20:44:07 +0000
Posts: 3139
Location: Rochester, Minnesota
 
Ossessionato
2007 Stella 225
Joined: Sat, 02 Nov 2019 20:44:07 +0000
Posts: 3139
Location: Rochester, Minnesota
Tue, 21 Jun 2022 22:27:23 +0000 linkquote
andyx wrote:
Thanks RayI've tried that , it seems to me that although the bolt is entering the nut they're at a slight angle to each otherand because the bracket is a snug fit around the boss I haven't got any wiggle room.
A couple of ideas come to mind,
1)Open out the bolt hole in the bracket and the boss to give me some rattling room and
2) open out the hole in the boss a couple of mm.
Any views on the above(' Dont be a twat' is acceptable as a comment )
I removed the cage completely and replaced nut with a flanged nylock. I put nut in a closed in wrench hold it in place with a bit of electrical tape. Then get bolt started a few turns and removed wrench and switch to open end. once tight you can pull wrench out. If I leave closed in end on nut it's trapped and I can't get it out.

I had issues with original setup on mine and had to replace craptastic nut.
Tue, 21 Jun 2022 22:34:34 +0000

Hooked
2005 Stellalossi 177 Fe
Joined: Sun, 14 Jun 2020 12:29:04 +0000
Posts: 305
Location: MA
 
Hooked
2005 Stellalossi 177 Fe
Joined: Sun, 14 Jun 2020 12:29:04 +0000
Posts: 305
Location: MA
Tue, 21 Jun 2022 22:34:34 +0000 linkquote
andyx wrote:
Next problem, having troublre refitting the bolt that holds the exhaust to the bottom of the engine , the bolt just will not engage with the captive nut, any 'tricks of the trade' that will help me
Thank You.
Thinking about it, it also helped to run the bolt through a die so the threads would more readily engage with the nut. Don't think I needed to run a tap through the nut, though.
Wed, 22 Jun 2022 02:47:03 +0000

Molto Verboso
Joined: Sun, 29 Nov 2020 21:32:23 +0000
Posts: 1138
Location: Los Angeles
 
Molto Verboso
Joined: Sun, 29 Nov 2020 21:32:23 +0000
Posts: 1138
Location: Los Angeles
Wed, 22 Jun 2022 02:47:03 +0000 linkquote
andyx wrote:
Thanks RayI've tried that , it seems to me that although the bolt is entering the nut they're at a slight angle to each otherand because the bracket is a snug fit around the boss I haven't got any wiggle room.
A couple of ideas come to mind,
1)Open out the bolt hole in the bracket and the boss to give me some rattling room and
2) open out the hole in the boss a couple of mm.
Any views on the above(' Dont be a twat' is acceptable as a comment )
Don't be a twat.
Be patient. Keep looking for the bite point by pushing/turning counter-clockwise, then clockwise while praying to the Rides-Straight Gods.

Do you happen to have a neodymium magnet?
Helps a lot.



Wed, 22 Jun 2022 03:20:33 +0000

Ossessionato
62 VBB1T Round Tail W/ leaner sidecar
Joined: Sat, 26 Jan 2019 09:50:15 +0000
Posts: 3284
Location: california
 
Ossessionato
62 VBB1T Round Tail W/ leaner sidecar
Joined: Sat, 26 Jan 2019 09:50:15 +0000
Posts: 3284
Location: california
Wed, 22 Jun 2022 03:20:33 +0000 linkquote
Never be shy about Dremeling.
Especially on aftermarket parts.
It's not bodgery, it's "fitting" the parts.
Get used to it and assume every part to be well fit will require some "adjustment".

Your inclination is right.
Adjust hole size to remove strain causing angle.
Proud not ashamed of a well fit part.

Friendly heads up.
This will lead to u looking at all purchases as potentially requiring adjustments.
Warm your wife or important others.
No fitting will ever be installed in the kitchen again the same.
Wed, 22 Jun 2022 03:42:23 +0000

Molto Verboso
Joined: Sun, 29 Nov 2020 21:32:23 +0000
Posts: 1138
Location: Los Angeles
 
Molto Verboso
Joined: Sun, 29 Nov 2020 21:32:23 +0000
Posts: 1138
Location: Los Angeles
Wed, 22 Jun 2022 03:42:23 +0000 linkquote
charlieman22 wrote:
Adjust hole size to remove strain causing angle.
Proud not ashamed of a well fit part.
Wait a minute...
What strain are you guys experiencing?
You're seating the bolt before connecting to the engine, right?
Wed, 22 Jun 2022 05:54:07 +0000

Ossessionato
62 VBB1T Round Tail W/ leaner sidecar
Joined: Sat, 26 Jan 2019 09:50:15 +0000
Posts: 3284
Location: california
 
Ossessionato
62 VBB1T Round Tail W/ leaner sidecar
Joined: Sat, 26 Jan 2019 09:50:15 +0000
Posts: 3284
Location: california
Wed, 22 Jun 2022 05:54:07 +0000 linkquote
I read it as the bolt being forced to sit at a slight angle, caused by misalignment of three parts, the two holes on the respective ears of the exhaust, and the swing arm hole.
I assumed what the PO was stating was, if he relieved the top of the hole in one of the ears, he could get ghe bolt to go through the swing arm and align with the other ear, without angle or tension.

Correct?
Wed, 22 Jun 2022 07:17:46 +0000

Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
 
Hooked
px 125 disc
Joined: Thu, 28 May 2020 16:48:26 +0000
Posts: 127
Location: Essex, GB
Wed, 22 Jun 2022 07:17:46 +0000 linkquote
charlieman22 wrote:
I read it as the bolt being forced to sit at a slight angle, caused by misalignment of three parts, the two holes on the respective ears of the exhaust, and the swing arm hole.
I assumed what the PO was stating was, if he relieved the top of the hole in one of the ears, he could get ghe bolt to go through the swing arm and align with the other ear, without angle or tension.

Correct?
This is the problem I think I have, hence the 'adjustment' suggestions.( By the way Charlieman, well used to fixing stuff on the fly. used to be a troubleshooter for a building firm I used to work for, so it doesnt scare me.)
Thank you all for your input, I shall work through all your ideas before I 'do some 'adjusting'
Thanks everybody
Wed, 22 Jun 2022 14:49:44 +0000

Molto Verboso
Joined: Sun, 29 Nov 2020 21:32:23 +0000
Posts: 1138
Location: Los Angeles
 
Molto Verboso
Joined: Sun, 29 Nov 2020 21:32:23 +0000
Posts: 1138
Location: Los Angeles
Wed, 22 Jun 2022 14:49:44 +0000 linkquote
If it doesn't align disconnected to the engine, you might be bumping against the center stand spring clip.

I shelved the clip and drilled a hole in the rib to seat the spring out of the way.
Wed, 22 Jun 2022 21:48:13 +0000

Addicted
Joined: Thu, 28 May 2020 18:20:07 +0000
Posts: 605
Location: Planet Earth
 
Addicted
Joined: Thu, 28 May 2020 18:20:07 +0000
Posts: 605
Location: Planet Earth
Wed, 22 Jun 2022 21:48:13 +0000 linkquote
You have to move the stand spring. With back wheel off and engine jacked slightly up you can use something underneath exhaust to support the exhaust as you afix, I used a cardboard box. Visually with exhaust manifold directly under exhaust stub push the frame retaining bolt through the exhaust fitting into the caged nut and socket it in a couple of mm of thread to bite it but still have some play manifold end. You now got the main weight supported of polini box by frame bolt. You can then line up the exhaust with cylinder stub and with a Block of wood you can knock it gently right up to manifold hilt with the hammer on block then secure the manifold bolt. then go back to exhaust frame bolt and tighten up. The polini box is not poor fitting they are spot on unless it's been dinked somehow.
   

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