Malossi VROne Mhr187 build
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PX 150
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Tue May 19, 2020 1:59 pm quote
Starting a new build on VROne cases and some tasty parts are starting to roll in
This is the worb5 laser welded version 60mm crank

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Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
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Tue May 19, 2020 2:36 pm quote
Niiice... watching this one with interest. Would love to know what difference it makes too (for those who dont know, Jimscoot already runs a MHR on Piaggio cases). Maybe - Tips on using GSF Dyno
Ossessionato
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Tue May 19, 2020 3:04 pm quote
That's one fancy looking crank! The weld that's been sanded down looks suspiciously like either a TIG or even a MIG bead for some reason?
Molto Verboso
62 VBB1T Round Tail W/ leaner sidecar
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Tue May 19, 2020 6:50 pm quote
Jimscoot - that is one fancy crank.
Like it!
Assume this is going to be a reed set up then?
Will enjoy the ride.
-CM
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PX 150
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Tue May 19, 2020 7:15 pm quote
Yes itís already a reed valved motor on PIAGGIO cases as Ginch stated.
Itís just giving me more scope on the Vrone cases. Bigger inlet better flowing through the overflows etc.
Malossi state that you can use full web crank (full circle) as they have moved the inlet slightly more forward as to not block the intake or disturb the gases.
Does anyone have experience with the differences a full circle crank (high primary compression) versus a flowed or bell crank (Low primary compression) the variables and how it effects jetting etc.
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
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Tue May 19, 2020 9:38 pm quote
There always seemed to be a bit of discussion on Scooterotica on hpc vs lpc.
You would gain extra case volume with the Malossi case, just because of that bigger opening and space forward of the crank as you described. So maybe with a full circle you'd have a similar case compression to what you have now? You can also increase with reed spacers and boost bottles. Not really sure of the felt effect of high vs low.
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LML 187
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Tue May 19, 2020 11:55 pm quote
That crank looks looks the part! Jimscoot. Is that the one Sip call the evo flowed crankshaft? Iím trying to work out if the standard flowed crank is the same minus the welding or if the evo has had more work/cutting done. That certainly looks flowed to the max! And itís making me jealous, my Ďflowedí crank is nothing compared to that
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PX 150
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Wed May 20, 2020 2:13 pm quote
Crazyfrog187 wrote:
That crank looks looks the part! Jimscoot. Is that the one Sip call the evo flowed crankshaft? Iím trying to work out if the standard flowed crank is the same minus the welding or if the evo has had more work/cutting done. That certainly looks flowed to the max! And itís making me jealous, my Ďflowedí crank is nothing compared to that
Yes,Evo flowed, this is the laser welded version. Sip state that anything north of 25hp would be wise to use this.
I had the cheaper worb5 and it hasn't been worked as much as this one, but man that has been one solid crank. I highly recommend it
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PX 150
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Thu May 21, 2020 1:05 pm quote
Hey guys
Im just working out gearing versus tire size for my build.
Previous i was running 22/68 primary with a 100/90-10 tire.
Ive just assembled malossi 23/64 gear set straight cut teeth.
Should I keep the 100/90-10 or go back to a 3.50-10.
It will be longstroke MHR187 reed intake, above crank, 30phbh carb, Vespower ignition. Scooter and service newline pipe
All on the new Vrone cases.
On my last motor MHR177 the pipe would start to come on the power at around 5700rpm and pull strong through to 8200rpm.
So seeing this will be 187 longstroke with more flow through the inlet ports etc how do you think it will go with 23/64 primary

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PX 150
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Wed Jun 03, 2020 11:23 pm quote
Slowly starting to come together, lot of port work on the cases to match the MHR cylinder

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Molto Verboso
Vespa
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Thu Jun 04, 2020 5:43 am quote
wow purdy
Ossessionato
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Thu Jun 04, 2020 7:32 am quote
Did you consider painting the cylinder & head black to help with cooling?

I did that when I replaced my BGM and it seems to have made a noticeable difference with controlling heat.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
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Thu Jun 04, 2020 12:08 pm quote
Did you put in the 23/64 gearing? Is there a 22 cog for that just incase it doesn't pull?

Looking really nice. Seems a shame to get it all dirty.
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
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Thu Jun 04, 2020 2:52 pm quote
Looks amazing all brand new and clean. And your work looks great too Jamie!

So where dos the engine number go on these? Maybe it's not a big issue, but if you went to register a scooter with one in it, it would be a problem.
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PX 150
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Thu Jun 04, 2020 4:29 pm quote
Chandlerman thats a good point. Ive never had issues with heat on this setup on my old mhr but worth looking into for sure.
Hey Jack yes 23/64
Ive just been out on it for its maiden voyage and gearing seems perfect.
My jetting needed some work but its feeling pretty radical crisp and solid and im at
125main
Av266
X13 needle
40 slide
55pilot
Its very torquey with the newline and the power comes on strong a little earlier around 5500rpm and pulls along effortless with very minimal throttle maintaining fast motorway speeds.
Timing is set static 21, it seems spot on.
Cylinder head temps on a TTO gauge are maximum 126-130c
Thanks Ginch i havent thought about the engine numbers but Stuart brought that up as well and he has a set of piaggio engine punches so will transfer them across at some stage.

Loving the extra power and torque this motor produces. The cases seem very well made and are strengthened in all the right places.
A big shout out to GPS Imports for sourcing these cases for me in a timely manner seeing that there has been a general hold up on online deliveries, with all thats going on in the worls at the
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Sat Jun 20, 2020 12:46 am quote
Okay guys Iíve just upgraded to a new pipe I was undecided with pipe design, because after sending them my setup, they offered me a pipe that was very similar to the SS newline timings, which I already have. Now donít get me wrong, this is a great pipe but it heavily relies on higher RPM and to be frank , the MHR is more of a midrange heavy hitter. The feedback wasnít great after offering me the bullet, which although looked and sounded the part didnít really sit well with my timings out of the box. With my gearing 23/64 on P200 gearing. I was more after something that was going to give me more torque and after toying with a few different pipe designs I ended up settling on the new Sip Nordspeed Camaro.
This pipe has dropped the RPM quite significantly at least 1000 RPM so now my powerband hits approximately 5500 rpm and continues through to approximately 7500rp.
The power hit in this range is magnificent as the front wheel reaches for the sky. Wow what a great pipe.
Iíve had to revise my jetting Specifically the needle and Atomiser to enrichen the mix through the mid section to an AV268 atomiser, coupled with an X4 needle.
Iíve basically copied the Cambridge Lambretta jetting guides for an Imola186 with expansion and it seems to have hit the spot perfectly.
Who would have thought Lambretta jetting crossing over to Vespa, but there you go win win.

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Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
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Sat Jun 20, 2020 3:49 am quote
Looks like some nice work. Very clean. Lot of money spent and high end parts for a tourer set up. Going to be really reliable with such low rpm. Is the kit just bolted on with standard port timing? Sure there's a lot more power in that, if you wanted it but if you wanted to cruise around reliably, I think you're done. Jetting sounds more appropriate btw.
Molto Verboso
Vespa
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Sat Jun 20, 2020 8:01 am quote
wow very nice never seen the Malossi cases in person great video sounds fun!
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Sat Jun 20, 2020 9:35 pm quote
[quote="Jack221"]Looks like some nice work. Very clean. Lot of money spent and high end parts for a tourer set up. Going to be really reliable with such low rpm. Is the kit just bolted on with standard port timing? Sure there's a lot more power in that, if you wanted it but if you wanted to cruise around reliably, I think you're done. Jetting sounds more appropriate btw.[/quote
Yes just bolted on, ports matched. Cleaned and polished exhaust ports, Squish 0.9. Variable timing 19
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
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Sun Jun 21, 2020 12:13 pm quote
jimscoot wrote:
Jack221 wrote:
Looks like some nice work. Very clean. Lot of money spent and high end parts for a tourer set up. Going to be really reliable with such low rpm. Is the kit just bolted on with standard port timing? Sure there's a lot more power in that, if you wanted it but if you wanted to cruise around reliably, I think you're done. Jetting sounds more appropriate btw.
Yes just bolted on, ports matched. Cleaned and polished exhaust ports, Squish 0.9. Variable timing 19
With all that hardware I just would have to tune it. It easy has another 10bhp in it. Those casings can take 10,000rpm all day. I'm buying a P200 set when I break mine. Can't be long now.
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PX 150
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Sun Jun 21, 2020 1:18 pm quote
I would like to Jack but I wouldn't know where to start. What would you suggest.?
Here are my current timings out of the box according to scootercenter.
Approx 30Hp with suitable peripherals

Exhaust angle: 178,5įOverflow angle: 122,5įForward exhaust angle: 28į
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
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Mon Jun 22, 2020 4:44 am quote
First thing to do is measure your cylinder. Every Malossi tends to be unique. Yours will not have these exact port durations. The big power is nearer to 130 degrees transfer, on that kit. As high as you wanted to go would depend on how you want it to perform. There will be dremelling involved and you have to be comfortable with that.
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PX 150
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Mon Jun 22, 2020 2:15 pm quote
Thanks Jack.
I emailed Worb5 about my setup.
Andy explained that Malossi have focused on the latest MHR177/187 port timings to be more road focused or strong road tuned motor. Any changes can quickly make unpleasant riding and really only track use with very close ratio gear set.
He went on to explain that they heavy rely on torque based setups to make road cruising easier.
Any further milling of the durations can quickly become a door stopper.
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
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Mon Jun 22, 2020 10:10 pm quote
And we're back where we started. You built a very nice road cruiser out of bolt together parts. If this is what you wanted you must be very happy.
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PX 150
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Tue Jun 23, 2020 10:39 pm quote
Very Happy Jack thanks for all your advice,
Cheers
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Tue Sep 15, 2020 10:35 pm quote
Ok for all you gear heads out there, pardon the pun, Im trialling a new pipe.
Itís a Malossi MHR pipe to suit there new MHR cylinder kits.

As you can see Iíve had a newline, Sip DSE and Nordspeed camaro.
I tried a BGM big box sport but it was terrible and just choked the MHR.

The Camaro is a great pipe but itís just more torque than really anything else.
The DSE was more high revving but it kinda felt like it was still hitting a wall somewhere and the newline was somewhere in the middle but I had to down jet to get it to run nice but then it would just get to hot and ping itís head off.

This MHR pipe has acceptable torque at low rpm around 4-5000rpm but then a dip to around 6500rpm then it really wakes up and friggin heck pulls your arms off to around the mid 9000rpm.
So loving this pipe for sure.
Down side is, Iím not pulling 4th (Thanks Jack wink;)
Im currently running 23/64 Malossi gearing.
Drt make a 22t Cosa straight cut gear that apparently Will mesh with a Polini 64 primary.
Question is will this work with my Malossi 64 straight cut primary and will it give me the desired down gear effect Iím looking for realising it will down gear across the board.
My gearbox is a standard late model PX150 thatís the same as a P200

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Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
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Location: London UK
Wed Sep 16, 2020 1:57 pm quote
If I didn't say it before, that kind of set up needs lower gearing. Even a P200 struggles with stock P200 gearing. 22 tooth would be ok on the 64 gear. Which 4th you have 35 tooth?

Do you still have all those exhausts? Quite some collection if you do.
Expansion exhausts are shaped and calibrated for use at a specific port timing. Not all companies openly tell you what these magic numbers are but they can be measured and calculated.
If your set up doesn't match the timing, they still go, just with less power, overheating and/or pinking.
Can either select an exhaust that matches the set up or grind the cylinder to match the pipe you like the most.
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PX 150
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Thu Sep 17, 2020 10:11 pm quote
35t 4th.
I counted all the gear teeth when I had it apart.
The Newline is back on and gives me the best overall compromise of low end torque and rev on ability. Tops out around 8,300rpm, no dips between 3rd and 4th and I can just lug it in 4th from very low revs, itís a very fussy pipe with jetting especially through the transition area but I canít really fault it otherwise.
Iíve just recently installed the 300 float valve and that has really helped with keeping up the fuel delivery.
Itís also eliminated that dreadfull faint pinking I had at high speed overrun.
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
Joined: 30 Nov 2011
Posts: 7853
Location: Victoria, Australia
Fri Sep 18, 2020 1:57 am quote
Sounds great. So I guess it's way quicker now than when I rode it it back in... when was it?
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PX 150
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Fri Sep 18, 2020 2:14 am quote
Byron Rally 2018,
Ginch, sheís a completely different animal now!
Veni, Vidi, Posti
74 Super, 75 Super, PX project, LML off-roader and new to 2018, '66 Blue Badge Smallframe
Joined: 30 Nov 2011
Posts: 7853
Location: Victoria, Australia
Fri Sep 18, 2020 8:34 pm quote
Would love to do that again... next QLD rally is 2023...
Jet Eye Master
PX221 Malossi, O tuned PX200 and some motorbikes
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Location: London UK
Fri Sep 18, 2020 10:47 pm quote
jimscoot wrote:
Iíve just recently installed the 300 float valve and that has really helped with keeping up the fuel delivery.
Itís also eliminated that dreadfull faint pinking I had at high speed overrun.
Going weak on overrun is always issues with the pilot jet. Keeping the float level higher might hide this but either the pilot jet is too small or the carb is too small.
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PX 150
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Sat Sep 19, 2020 1:05 pm quote
Great,I'm currently on a 55 pilot. I've got a 57 and 60 in my jet kit, I'll give it a go. Cheers
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