Sun Sep 27, 2020 7:58 am

Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
 
Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
Sun Sep 27, 2020 7:58 am linkquote
Has Anyone ever put a sip road exhaust on there scooter and did it make any difference? Looking to get more performance out of my Stella.

Any thoughts? Also right now everything on the bike is stock



Sun Sep 27, 2020 8:08 am

Molto Verboso
2007 Stella 225
Joined: 02 Nov 2019
Posts: 1875
Location: Rochester, Minnesota
 
Molto Verboso
2007 Stella 225
Joined: 02 Nov 2019
Posts: 1875
Location: Rochester, Minnesota
Sun Sep 27, 2020 8:08 am linkquote
Re: Anyone ever put a SIP exhaust on there Vespa px or Stell
Evanjakiun wrote:
Has Anyone ever put a sip road exhaust on there scooter and did it make any difference? Looking to get more performance out of my Stella.

Any thoughts? Also right now everything on the bike is stock
A lot of us have, they do run better. Does require a few carburetor jets to be replaced with larger ones. Jets are.easy to get to on a SI carburetor. You just have to remove the air filter.
Sun Sep 27, 2020 8:27 am

Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
 
Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
Sun Sep 27, 2020 8:27 am linkquote
Sweet and you noticed a change in power or maybe top end. Just got my Stella. Seems kind of slow but I'm used to my Vespa lx150 with sito plus exhaust but hey it is a 4t automatic. I don't want to start putting a kit on it yet. Scooter shop recommendation was to start with the exhaust first.
Sun Sep 27, 2020 8:47 am

Ossessionato
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 61 Ser 2, 65 Silver Special, 86 Elite 80, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 4071
Location: Oceanside, CA
 
Ossessionato
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 61 Ser 2, 65 Silver Special, 86 Elite 80, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 4071
Location: Oceanside, CA
Sun Sep 27, 2020 8:47 am linkquote
It'll make a difference for sure! Easiest $150 improvement you can make on a scooter. Upjet 4 points and see if your air filter heart has been drilled.
Sun Sep 27, 2020 8:58 am

Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
 
Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
Sun Sep 27, 2020 8:58 am linkquote
Oh sweet,I'm so stoked now. Can't wait
Sun Sep 27, 2020 9:01 am

Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
 
Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
Sun Sep 27, 2020 9:01 am linkquote
The Polini box exhaust out performs the SIP Road in dyno tests. I recently put a Polini on my Stella and it definitely increased power at low and midrange rpms. Didn't have much, if any, effect on top speed, though. The Polini is well made and fit my Stella perfectly. It also sounds much better than stock.

You will have to increase the size of your main jet--a 103 is pretty typical and that is what seems to work best on my scooter. If you're like me and can't leave well enough alone, you can fiddle-fork around with the other jets too, but you don't really have to.
Sun Sep 27, 2020 9:02 am

Molto Verboso
2007 Stella 225
Joined: 02 Nov 2019
Posts: 1875
Location: Rochester, Minnesota
 
Molto Verboso
2007 Stella 225
Joined: 02 Nov 2019
Posts: 1875
Location: Rochester, Minnesota
Sun Sep 27, 2020 9:02 am linkquote
Evanjakiun wrote:
Sweet and you noticed a change in power or maybe top end. Just got my Stella. Seems kind of slow but I'm used to my Vespa lx150 with sito plus exhaust but hey it is a 4t automatic. I don't want to start putting a kit on it yet. Scooter shop recommendation was to start with the exhaust first.
I agree it's easy to do, nothing irreversible. I found this article interesting. There are newer versions of the SIP I think their is a 3.0 these days.

There's also a magazine article floating around here purely about a Stella.




https://www.scootering.com/scootering-classics-vespa-tuning-upgrade-mega-feature/


https://www.scootering.com/?s=Mega+feature

https://www.scootering.com/the-vespa-big-box-exhaust-test/

https://scooterlab.uk/vespa-big-box-exhaust-shootout-feature-2/

ProjectStella.pdf
 Description:

Download
 Filename:  ProjectStella.pdf
 Filesize:  1.8 MB

Sun Sep 27, 2020 9:30 am

Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
 
Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
Sun Sep 27, 2020 9:30 am linkquote
Wow you guys are great I can't believe you guys gave me all this information and so quickly.

Now to start reading 📖
Sun Sep 27, 2020 9:37 am

Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
 
Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
Sun Sep 27, 2020 9:37 am linkquote
Oh yeah. I also replaced the stock Stella air filter with the predrilled one from Piaggio. Done at the same time as the exhaust change so can't really say how much of the improvement was from one or the other.
Sun Sep 27, 2020 10:12 am

Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
 
Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
Sun Sep 27, 2020 10:12 am linkquote
One more thing, take that old project Stella article with a huge grain of salt. Based on my experience, it is full of hyperbole and misinformation. In particular, I found the so-called Bald John jetting was all wrong.
Sun Sep 27, 2020 11:18 am

Ossessionato
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 61 Ser 2, 65 Silver Special, 86 Elite 80, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 4071
Location: Oceanside, CA
 
Ossessionato
73 & 74 Rally, 76 ET3, 80 P200, 06 PX150, 61 Ser 2, 65 Silver Special, 86 Elite 80, 2015 HD Road Glide Special, 2011 Ural Tourist
Joined: 18 Jan 2012
Posts: 4071
Location: Oceanside, CA
Sun Sep 27, 2020 11:18 am linkquote
Air filters make a pretty big difference. If you havent already, ditch the white plastic filter under the seat if its there, and if you want to clean up acceleration, swap the blue Stella filter for a metal mesh P200 filter with the heart drilled out. Blue filter with the heart drilled out works fine, but I've noticed high revs in 1st really clean up with the P200 mesh filter.
Sun Sep 27, 2020 1:51 pm

Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
 
Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
Sun Sep 27, 2020 1:51 pm linkquote
OK, so I reread that project Stella article and, to be fair, it was not as bad as I remembered. What drove me over the edge was the part of the specifications stating that a stock Stella would do 60+ mph. That is ludicrous. It is also contradicted by the testers' own results reporting that a Stella with stock cylinder, stock pipe, P200 air filter and the very lean Bald John main stack only did 51 mph. That result and the others reported do seem credible.

Apart from that and the Bald John jetting generally, I would say the biggest issue with the article is the way it focuses on top speeds only achievable with true expansion pipe exhausts without adequately acknowledging the way they shift the power band toward the upper limits of the engine's rev range.
Sun Sep 27, 2020 2:47 pm

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: 8091
Location: Victoria, Australia
 
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: 8091
Location: Victoria, Australia
Sun Sep 27, 2020 2:47 pm linkquote
Evanjakiun welcome to the forum.
Glad you found your information, however there is a search function on the forum, had you used it you would have found a bazillion references to the SIP road exhaust.
Hope you'll make more use of it... in time you'll be able to offer advice based on your own experiences.
Kowalski wrote:
...I would say the biggest issue with the article is the way it focuses on top speeds only achievable with true expansion pipe exhausts without adequately acknowledging the way they shift the power band toward the upper limits of the engine's rev range.
Don't know if you were around in those days... the Sito Plus was the only option if you didn't want an expansion. It's easy to take the plethora of different box exhausts for granted these days. There has been a huge amount of development going on 99% driven by the Germans trying to find something that would give them the power of an expansion but still be able to comply with their TUV rules to be legally on the road. For that 4-5000pm area the modern box walks all over most expansions due to the dip/hole before they hit their design resonance area.

Yes, they did focus on top speed, but there was no box pipe that would improve top speed then.
Mon Sep 28, 2020 5:28 am

Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
 
Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
Mon Sep 28, 2020 5:28 am linkquote
You get about 1bhp extra with a sip road 2.0 and about 0.5bhp with air filter drilled out on standard 125; there were some diagnostic results for this put online some years back and the biggest difference came from the air filter drilling . It does make a considerable difference and the cheapest bolt on modification ive done. My main jet was 102 on a 20mm si and this was pretty much the norm for this setup, 101-102. There is now a sip road 3.0 out which is claiming up to 2bhp more than the sip road 2.0 but these results are for tuned setups. I would imagine on standard you would see a slight difference in power.

I note in that scoot stella exhaust info they are all expansion pipes, noisy, upset the neighbours. Box pipes IMO are the way to go on standard rigs, more sympathetic in looks, noise and advanced now in power. They make things easier too by the road side, such as changing tyre, adjusting clutch nut, brakes etc.

I have since gone to a dr177 using my old sip road 2.0 and its got loads of torque and about to change to the sip 3.0 purely as my road 2.0 is getting on a bit. Having said that, seeing reviews it appears the sip 3.0 is just a near copy of the polini box and louder too. Maybe i will throw on a polini box instead. if you go on youtube you can hear the difference.
https://www.youtube.com/watch?v=RuJ1ZrOswJE

So maybe dont throw money at the road 2.0 if its old tech, consider either the polinibox or the road 3.0 One thing about the SIP stuff is they always fit first time and line up perfect. Ever tried lining up a supposed standard piaggio pipe, they never fit on the exhaust stub properly. Not sure if polini is the same.
Mon Sep 28, 2020 6:18 am

Ossessionato
1979 P150X, 1983 P200E, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 2461
Location: Veria, Greece
 
Ossessionato
1979 P150X, 1983 P200E, 1988 T5, 1995 PX200E, 2011 Yamaha Fazer 600 S2
Joined: 02 Aug 2015
Posts: 2461
Location: Veria, Greece
Mon Sep 28, 2020 6:18 am linkquote
If you can find the Polini BOX stateside, it's even better than the SIP Road 2.0...
Mon Sep 28, 2020 6:54 am

Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
 
Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
Mon Sep 28, 2020 6:54 am linkquote
I am in the US and got my Polini here.

https://primoscootercompany.com/products/146-62?variant=32979998965900&currency=USD&utm_medium=product_sync&utm_source=google&utm_content=sag_organic&utm_campaign=sag_organic&utm_campaign=gs-2020-03-29&utm_source=google&utm_medium=smart_campaign

It took them a few days to acknowledge my order and it actually shipped from some affiliated vendor in FL but it was all good in the end.
Mon Sep 28, 2020 9:11 am

Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
 
Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
Mon Sep 28, 2020 9:11 am linkquote
Yes and if you line up a picture of the polinibox with the sip road 3.0 you will notice they are pretty identical. I think SIP are playing catchup. It also seems in the UK the polinibox is a bit cheaper and from the previous youtube link ive posted in this thread, you can hear the polini sound is closer to the original. My sip 2.0 at speed (60-65 mph) is really loud and gives me quite a headache after a long thrash. The polini got a deeper sound where as the sip sounds like a chain saw, ding ding ding, or as my friend said a machine gun. The sip 3.0 has a couple of latches on it for securing to engine via two springs, bit of security in case the exhaust clamp comes loose, im not sure, maybe somebody confirm, whether the polinibox has this.
Mon Sep 28, 2020 1:54 pm

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: 8091
Location: Victoria, Australia
 
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: 8091
Location: Victoria, Australia
Mon Sep 28, 2020 1:54 pm linkquote
Polini Box doesn't have spring hooks, and probably needs them. I welded some like this on.
It's definitely a little louder than the Sip Road, though as you say with a deeper sound which is easier to live with.



Wed Sep 30, 2020 4:02 am

Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
 
Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
Wed Sep 30, 2020 4:02 am linkquote
Ginch wrote:
Polini Box doesn't have spring hooks, and probably needs them. I welded some like this on.
It's definitely a little louder than the Sip Road, though as you say with a deeper sound which is easier to live with.
Thanks for sharing this. The sip road 3.0 has two spring mount points.
Wed Sep 30, 2020 8:33 am

Hooked
Stella 2T 150, Honda C70
Joined: 25 Sep 2019
Posts: 159
Location: Seattle
 
Hooked
Stella 2T 150, Honda C70
Joined: 25 Sep 2019
Posts: 159
Location: Seattle
Wed Sep 30, 2020 8:33 am linkquote
I've got the SR Race exhaust from Mercato. Basically a cheaper copy of the Sip Road 2. Between that, the air filter and some jetting, I found it made my Stella a much more practical city scoot (especially with hills). Its still not a speed demon but it gets me where I need to go and has enough power to feel exciting without going so fast that I'm beyond the limits of my abilities.

Hal
Thu Oct 01, 2020 8:32 am

Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
 
Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
Thu Oct 01, 2020 8:32 am linkquote
whereshaldo wrote:
I've got the SR Race exhaust from Mercato. Basically a cheaper copy of the Sip Road 2. Between that, the air filter and some jetting, I found it made my Stella a much more practical city scoot (especially with hills). Its still not a speed demon but it gets me where I need to go and has enough power to feel exciting without going so fast that I'm beyond the limits of my abilities.

Hal
Beyond the limits of my abilities, that made me smile. Ive just run in a DR177 and hit the heady speed of 65 with a road 2.0 (gps confirmed) and quite frankly felt like i was losing my bottle as the little PX125 never gone that fast before. 65mph on ten inch wheels, crap roads with pot holes, car drivers who just want to pull out at junctions in front of me, with a good front disc brake but rear drum pathetic.
Thu Oct 01, 2020 11:18 am

Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
 
Hooked
2005 Stellalossi 177 Fe
Joined: 14 Jun 2020
Posts: 172
Location: MA
Thu Oct 01, 2020 11:18 am linkquote
ferriswolf wrote:
Beyond the limits of my abilities, that made me smile. Ive just run in a DR177 and hit the heady speed of 65 with a road 2.0 (gps confirmed) and quite frankly felt like i was losing my bottle as the little PX125 never gone that fast before. 65mph on ten inch wheels, crap roads with pot holes, car drivers who just want to pull out at junctions in front of me, with a good front disc brake but rear drum pathetic.
I've been meaning to ask whether you've been in Bognor Regis long enough to remember a disco club named Khristianos. Misspent some of my youth in that place a long time ago.
Fri Oct 02, 2020 5:36 pm

Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
 
Member
Stella
Joined: 19 Sep 2020
Posts: 34
Location: Staten island
Fri Oct 02, 2020 5:36 pm linkquote
Just got the sip road exhaust put on along with rejetting and all that good stuff. Holy balls did it make a difference. 2nd gear feels more like 3rd and 4th now. Way more room in the gears to rev it up. I'm impressed that it actually made a difference. I'm so used to 4t Vespas with performance pipes and it only makes a little difference but with the 2t it was really noticeable.

Super stoked
Sat Oct 03, 2020 10:23 am

Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
 
Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
Sat Oct 03, 2020 10:23 am linkquote
I've been meaning to ask whether you've been in Bognor Regis long enough to remember a disco club named Khristianos. Misspent some of my youth in that place a long time ago.[/quote]

Hell yes, i used to hang out there too, this would have been around 1983 and it was my guilty pleasure to dance about tanked up on Pernod and Black, listening to all the new romantic scene. My fellow scooterists, who were either mods or coming out of mod and becoming scooter boys would hang out in Waterloo Square all day and all night but hit the club on the pier for the occasional mod/northern soul night. I liked all music so headed to Kristianos with other like minded folk. It burnt down in the end, then a few years back the whole building burnt down when the chippy and restaurant underneath it went up in flames.
PM Me because theres a good chance i actually know you!

Last edited by ferriswolf on Sat Oct 03, 2020 10:30 am; edited 1 time in total
Sat Oct 03, 2020 10:25 am

Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
 
Hooked
PX
Joined: 28 May 2020
Posts: 214
Location: Bognor Regis
Sat Oct 03, 2020 10:25 am linkquote
Evanjakiun wrote:
Just got the sip road exhaust put on along with rejetting and all that good stuff. Holy balls did it make a difference. 2nd gear feels more like 3rd and 4th now. Way more room in the gears to rev it up. I'm impressed that it actually made a difference. I'm so used to 4t Vespas with performance pipes and it only makes a little difference but with the 2t it was really noticeable.

Super stoked
Thats great news. a performance exhaust that actually performs and not just a noise magnifier. Glad you are happy.
Wed Oct 07, 2020 3:27 pm

Ossessionato
2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others
Joined: 26 May 2013
Posts: 4096
Location: That bushfire place
 
Ossessionato
2 matching N.Z. '69 VBC Super, 177cc Racer, VespaCross Bodge, Puch SRA150, Piaggio Zip 100! & others
Joined: 26 May 2013
Posts: 4096
Location: That bushfire place
Wed Oct 07, 2020 3:27 pm linkquote
SEARCH... Please use the SEARCH function
"Has Anyone ever put a sip road exhaust on there scooter"
Nah!
Nothing more to add!
Thu Oct 08, 2020 7:43 am

Hooked
PX
Joined: 07 Feb 2016
Posts: 178
Location: Switzerland
 
Hooked
PX
Joined: 07 Feb 2016
Posts: 178
Location: Switzerland
Thu Oct 08, 2020 7:43 am linkquote
I fitted a SiP Road to my PX with a Pinasco 177 and 24 carb..when I restored the Vespa a few years ago.
To be honest I have never been really happy with the exhaust.
I think its a SIP Road 2.
The exhaust even though it has only done around 1000Km since new has become progressivly louder. Also I get a lot of vibrations through the frame when this exhaust is fitted.
The pipe mount and the main bolt I always torque to the correct values.
I have never really been able to tune the motor to run well with this exhaust either.
I fitted an original Piaggio exhaust today as I needed to have an MOT check.
I only adjusted the idle mixture and idle speed just to get to the MOT.
But I was shocked at how smooth the original exhaust made the bike run. I didnt really notice any loss of power either ???
The flat spot that I have always had with the SiP Road is still there but I would say a lot less with the Piaggio standard exhaust.

I have looked for problems like cracks or maybe a loose baffle but I cant see any issues with it.
It could be blocked inside the baffles but i doubt it with so few miles...

I wont be fitting the SiP Road again..
Maybe I just got a bad one 😂
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