Modern Vespa

I always liked the look of the Polini old school pipe. The way it tucks under and the silencer is right at the engine.

And you can have a spare tire.

The Polini Box looks nice too.

You don't really need to remove the shock to check the spacer. Look at the flywheel cover lines in relation to the floorboard or engine cowl. Like Safis picture, the slits in the flywheel cover is aligned straight with the floorboard or the bottom of the motor cowl, if the cowl was on. If the flywheel slits point at an angle and not straight the spacer is too short or too long.

The picture with of the red P shows the flywheel slits at an angle in relation to the bottom of the cowl. The angel of the picture maybe wrong and the correct spacer maybe used but you get an idea of what your looking for.

Man, I'm always learning, many thanks for that info, makes all sense.
I checked mine (no one seated) and its low, I need a longer distance nut, mine is 26mm I'll check the 42 or 48mm version

Hello. Thanks for the picture, I am in love with your expansion chamber, it looks very nice and it fits very well., what brand is it? I have had a few expansion chambers and not a single one had issues hitting the ground. The elbow were big and fast (hold your jokes) but the elbow were tucked up. A fellow rider from this forum sent me a Polini and I am going to test it for fitment and also for performance, I already told him that it is very likely that I will trade my "new"(now scratched SR3 for his Polini. He is aiming for more top end, specifically more top speed.

I will be doing some test this weekend as soon as the gust winds slow down within the 48 hours ("got to love the southwest desert") lol..

I have a set of brand new shocks sitting on my coffee table that I could try installing to see if that mitigates the problem but as I said, the problem lies on that front elbow design pointing down. Sure the new rear shock could help some but considering that I will be picking up my son for many more months I just want to measure that I put exhaust hardware that is well design and safe.

Man!! I am looking at the picture of the rear of your vespa and it looks bad ass! Malossi engine cases, aluminum wheels, Allen bolts on the engine cases, lightweight flywheel, aluminum footrest, beautiful expansion chamber.. you don't mess around

Thanks!! Exhaust (Cobra 220) is made by Pipe Design ( http://www.pipedesign.de/home.html ) and comes from Germany. My engine build is below...

Going back to rotary

I dunno, needs more springs. Like 7 or 23 more

Safis, that's a bad ass vespa, great work! Thanks for sharing

There are a few expansion chamber exhaust fabricators in Germany, a few weeks ago two tourists approached our Vespas, one of the them said "My son in Germany builds exhausts for Vespas", we took a picture together so that we could use it later to get a discount

It's https://falk-r.de/en/
Small world

*swoon* over those lamp grilles and panel embellishers. I love me some 80's tat (duh) but man alive if a headlight stone guard didn't damn near kill me. I'd ordered lenses and guards for my PK from SIP back when it was, like, an ordeal and *finally* my stuff showed up and I was all hot to trot.

on a windy back road hauling ass the HL guard unhinged itself and flew up hitting me in the face and decided to take up residence in the visor orifice of my helmet while prying off my headlight lens and jettisoning it out into the great dark unknown. upon regaining my composure I found myself mostly unscathed, with a feeble lamp in the dark and out all that dinero (the guard AND and a new headlight!). needless to say, I took all that shit off and put all the stocker stuff back the next day. but it still looks cool AF though.

anyhow, I've always liked RH Pinasco, polini and simonini pipes. sound wise they're not awful and they all seem to ride with decent manners while giving a decent boost of power.

I want to say that there was a pipe shoot out back when where the test mule was a T5 and the simonini pipe actually topped some super expensive high end stuff.

I found something after the fact that changes the game. Long history short, a fellow forum member sent me his Polini Box last week for testing. I did an all day 4-5 hour testing back to back between a Polini box, a Malossi box and a SR3.

I used my PX150 as a mule with much stiffer rear suspension and the SR3 fits much much better. I came to realize that the SR3 exhaust was touching the floor basically due to a softer rear suspension on my Sprint Veloce.

At this time I am no longer putting my SR3 for sale nor trading it in like I was almost about to do. On a negative note, my own testing has been like a kick in the 00s because I literally just ordered a Polini Box for my P200E believing that the fitment issue was irreconcilable but now knowing all the facts I wish I knew earlier because I would have ordered the SR3 for the P200E too.

It is now too late, I am stuck with a Polini box, a Malossi box and a SR3 box all 3 recently acquired. Had I known that the fitment issue was 80% due to a softer suspension and I would have ordered all three SR3s instead of Polini, Malossi and SR3.

On a different note, the testing went well. I tested back to back a Malossi box, then a Polini box(sent to me by a fellow forum member) and lastly a SR3. Here is the order of performance SR3>Polini>Malossi.

The Malossi box is tiny, it is as small as the stock box. The polini is about 10-15" larger and the sr3 is also 10-15 larger than the Polini.

Scooterist, not only the SR3 was touching the floor because of the softer spring suspension, as also I *think* it was designed with something more in account - rear shock stack height.

As seen on the video I posted above, the exhaust pipe *was* entering the box on an angle, facing down, worse when I put pressure with my weight. Well, no more, now the fit is as good or even better than my previous SR2, I changed the spacer nut for a 48mm one and bingo... in total the rear raised around 2cm and the exhaust pipe is now horizontal to the ground. with my weight the flywheel vents align perfectly with chassis vents.

Here it is before with SR2 and now with SR3 + SIP Perf.2.0 rear shock and 48mm spacer nut.
Btw, the cartridge on the original shock was leaking so now its much better in control and comfort.

Ditto. I have the SR3 on my P200-ified Sprint. It's never hit the ground and I'm about 230lbs these days, and that's riding on what passes for roads here in Nashville.

I'll go snap a clearance shot of the exhaust, but I'd definitely consider getting a longer rear shock spacer to improve your geometry. It will make a huge difference.

Are the horizonal louvers of your flywheel cover parallel to the bottom of the cowl? If that's not the case, you need to adjust it.

That looks WAY better.

And I see you have a possible stealthy location for your CHT gauge, should you some day decide to pull the trigger:

I didn't post the picture as it was before fitting the new rear shock + longer nut but yes, its way better. Neat ... Faked can LOL, mine has oil and its smaller 1L

Its as seen on lower pic. When I'm seated they get perfectly horizontal. Riding height is just perfect now. One thing I noticed too, it seems to sink less front when braking but that really doesn't surprise me since the replaced shock was leaking so I guess it was basically blown and rebounding at light speed

Yours looks correct. I was referring to Scooterist's.

Here's mine.

if you want to, it can go +1/2 inch installing a longer spacer nut. But it looks fine as it is