Stella 4T exhaust, lets discuss

viney266 · Post by **viney266** » Thu Nov 28, 2013 6:35 pm

The 4T is so quiet ( I don't like obnoxious loud) it needs something, and besides, that cat HAS to go. I have installed 2. Let's get some feedback on what is out there.

http://www.scooterworks.com/sito-plus-e ... peKYic7AfM

I installed one of these on a friends 4T. Pro: Cheap and easy, only mod was a 1 size larger main in the stock carb. Con: little louder and a small performance upgrade. I think the carb is holding it back, but for the money you can't beat it. No cat and it runs better and so far has NOT cracked.

http://www.scooterworks.com/pinasco-per ... peK9Cc7AfM

One of these came in installed with the carb kit , too. Pro: the pipe DEF. made better power, a improvement of 5-6 MPH easy. Con: costly , but it works.... as a side note, that carb kit is crap, we need something that works, myself as well as others could NOT get it to stop fouling plugs down low.

http://www.scooterworks.com/giannelli-e ... peLpic7AfM

Haven't tried, but MOST interesting, an expansion chamber on a 4T huh? Hey, the price is right and it might work, LOL, I think the exit pipe is too small, but if anyone tries it let us know.

http://www.sip-scootershop.com/en/produ ... +_19000140

REALLY want to try one of these. I think this might be the ticket.

Anything else to add please do.

Tipper · Post by **Tipper** » Thu Nov 28, 2013 7:01 pm

The GPR -

http://www.gpr.it/prodotti.htm?idTipolo ... od=&idAcc=

Stainless,road legal,sounds nice and gives a dyno proven power increase.

az_slynch · Post by **az_slynch** » Thu Nov 28, 2013 9:33 pm

Pinasco's carb kit has the wrong throttle slide. The #30 slide creates too much low-throttle vacuum. Try swapping it out with a #40 PHBG slide from some place like Treatland.

jimmbomb · Post by **jimmbomb** » Fri Nov 29, 2013 3:19 am

I tried one of the Polinis on a 2010...
www.sip-scootershop.com/en/products/rac ... +_19000140

I didn't do any performance tests but it did nothing to make it louder.
Still quiet but a different warble at best.

jimmbomb · Post by **jimmbomb** » Fri Nov 29, 2013 3:23 am

I tried one of the Polinis on a 2010...
www.sip-scootershop.com/en/products/rac ... +_19000140

I didn't do any performance tests but it did nothing to make it louder.
Still quiet but a different warble at best.

Stilts · Post by **Stilts** » Fri Nov 29, 2013 2:43 pm

viney266 wrote:The 4T is so quiet ( I don't like obnoxious loud) it needs something, and besides, that cat HAS to go. I have installed 2. Let's get some feedback on what is out there.

http://www.scooterworks.com/sito-plus-e ... peKYic7AfM

I installed one of these on a friends 4T. Pro: Cheap and easy, only mod was a 1 size larger main in the stock carb. Con: little louder and a small performance upgrade. I think the carb is holding it back, but for the money you can't beat it. No cat and it runs better and so far has NOT cracked.

http://www.scooterworks.com/pinasco-per ... peK9Cc7AfM

One of these came in installed with the carb kit , too. Pro: the pipe DEF. made better power, a improvement of 5-6 MPH easy. Con: costly , but it works.... as a side note, that carb kit is crap, we need something that works, myself as well as others could NOT get it to stop fouling plugs down low.

http://www.scooterworks.com/giannelli-e ... peLpic7AfM

Haven't tried, but MOST interesting, an expansion chamber on a 4T huh? Hey, the price is right and it might work, LOL, I think the exit pipe is too small, but if anyone tries it let us know.

http://www.sip-scootershop.com/en/produ ... +_19000140

REALLY want to try one of these. I think this might be the ticket.

Anything else to add please do.

I plan on getting one of those Giannelli pipes in the spring and will definitely share my experience.

misterbrackets · Post by **misterbrackets** » Sun Dec 01, 2013 4:05 am

Tipper wrote:The GPR -

http://www.gpr.it/prodotti.htm?idTipolo ... od=&idAcc=

Stainless,road legal,sounds nice and gives a dyno proven power increase.

Looks/sounds nice. Tipper, did you install one of these? Any other modifications you needed to make? Carb, etc?

Tipper · Post by **Tipper** » Sun Dec 01, 2013 1:11 pm

misterbrackets wrote:
Tipper wrote:The GPR -

http://www.gpr.it/prodotti.htm?idTipolo ... od=&idAcc=

Stainless,road legal,sounds nice and gives a dyno proven power increase.
Looks/sounds nice. Tipper, did you install one of these? Any other modifications you needed to make? Carb, etc?

They don't make one for the 200 4t so I haven't been able to fit one. You will definitely need to up jet a couple of points though.

Eel · Post by **Eel** » Sun Dec 01, 2013 7:14 pm

Do they still make the sito plus? I cant seem to find it anywhere in stock.

Tipper · Post by **Tipper** » Mon Dec 02, 2013 12:00 am

Eel wrote:Do they still make the sito plus? I cant seem to find it anywhere in stock.

Sito have gone bust so once they're gone they're gone and I don't think their were huge amounts of the 4t version out there in the first place.

Eel · Post by **Eel** » Thu Dec 05, 2013 9:52 pm

So I am considering a pinasco for my stella 4T. (3k miles)

I don't personally care about power max speed, etc. My current stock exhaust is cracking and i need a quality replacement.

Do I need to upgrade the main jet? if so what size should I be upgrading to for the free flowing exhaust? I dont intend to upgrade the carb or air filter to anything but whats stock.

Any issues with fitment or quality that I should be aware of?

Could really use some help before I pull the trigger.

Thanks in advance.

Eel · Post by **Eel** » Fri Dec 06, 2013 9:34 pm

Bit the bullet and got the Pinasco. Talking to scooterworks they are saying I only need one size larger on the main jet if I'm not upgrading the carb. (Size 92)

Scooterworks has it for some crazy value on their website (430 bucks) but if you go to ebay, they (scooterworks) are selling it for $269. Dont know how that works but I'm not going to complain. Pretty much takes the cons noted above for this exhaust out of the conversation.

Looks like still one left on Ebay if anyone wants to scoop it up.

SonnyD · Post by **SonnyD** » Mon Dec 09, 2013 7:40 pm

If I end up with a Stella, I'm definitely going for the GPR... that thing sounds awesome.......

viney266 · Post by **viney266** » Tue Dec 10, 2013 6:01 am

someone have a link to one running? ( the gpr)

Tipper · Post by **Tipper** » Tue Dec 10, 2013 11:42 am

Tipper wrote:The GPR -

http://www.gpr.it/prodotti.htm?idTipolo ... od=&idAcc=

Stainless,road legal,sounds nice and gives a dyno proven power increase.

There are videos on the page.

anton walbrook · Post by **anton walbrook** » Thu Dec 12, 2013 6:11 am

Here's all the Polini Stuff http://scooterpartsco.com/index.php?mai ... ath=85_505 I've been thinking about one of the stellas but i might wait for the automatic one. Someone told me that GPR stuff that is really cheap on ebay is from China and they just sell it in Italy like the prima stuff that scooterworks sells is really chinese junk but they make it sound like it's from italy.

Tipper · Post by **Tipper** » Thu Dec 12, 2013 4:10 pm

I can't find any evidence that the GPR pipes are made in China.

Lots of Italian people,talking Italian in factories that look like they are in Italy though.

SonnyD · Post by **SonnyD** » Fri Dec 13, 2013 12:35 pm

Yeah, it definitely looked like Italy to me....maybe they have them built in China, I don't know, but the quality looks pretty good from what I could see.... and I definitely haven't heard any others that sound that good!!!!!

slotrod65 · Post by **slotrod65** » Fri Dec 13, 2013 3:55 pm

Well, I took the leap and ordered the GPR exhaust, partially funded as a Christmas present. I will post more when it arrives, and takes photos.
Unfortunately, as I live in upstate NY, it will not be installed until the spring.

http://www.ebay.com/itm/LML-STAR-125-ST ... OC:US:3160

And as for the origin, the auction states: HAND MADE PRODUCT MADE IN ITALY

Stilts · Post by **Stilts** » Fri Dec 13, 2013 3:58 pm

slotrod65 wrote:Well, I took the leap and ordered the GPR exhaust, partially funded as a Christmas present. I will post more when it arrives, and takes photos.
Unfortunately, as I live in upstate NY, it will not be installed until the spring.

http://www.ebay.com/itm/LML-STAR-125-ST ... OC:US:3160

And as for the origin, the auction states: HAND MADE PRODUCT MADE IN ITALY

we have to wait until spring?! oh, come now, where's your spunk?

slotrod65 · Post by **slotrod65** » Fri Dec 13, 2013 4:37 pm

Stilts wrote: we have to wait until spring?! oh, come now, where's your spunk?

It's out in the shed, which is covered with snow.

jimmbomb · Post by **jimmbomb** » Fri Dec 13, 2013 4:52 pm

slotrod65 wrote:
Stilts wrote: we have to wait until spring?! oh, come now, where's your spunk?
It's out in the shed, which is covered with snow.

Haha...take the mirrors off and roll it inside. .!!!

Tipper · Post by **Tipper** » Fri Dec 13, 2013 7:17 pm

slotrod65 wrote:
Stilts wrote: we have to wait until spring?! oh, come now, where's your spunk?
It's out in the shed, which is covered with snow.

The shed is covered in snow not your scooter,get out there and get it fitted !

Oh and don't forget to get lets of photos,HD video and then before and after dyno print outs.

Thanks,happy Christmas.

jimmbomb · Post by **jimmbomb** » Sat Dec 14, 2013 2:30 am

i'm thinking with that GPR... one could pick out any nice tailpipe chrome or make one any style... bullet, fishtail, etc.. and get the right diameter and just clamp it on to that shorty that comes with the pipe.. the possibilities are mucho..
if I ever get my mits on another 4t.. i'm going with the GPR and adding a custom tail pipe...

slotrod65 · Post by **slotrod65** » Sat Dec 14, 2013 2:42 am

Tipper wrote:out there and get it fitted !

Oh and don't forget to get lets of photos,HD video and then before and after dyno print outs.

Thanks,happy Christmas.

Dyno?

Tipper, The closest dealer is over 2 hours drive from me...

Tipper · Post by **Tipper** » Sat Dec 14, 2013 10:37 am

slotrod65 wrote:
Tipper wrote:out there and get it fitted !

Oh and don't forget to get lets of photos,HD video and then before and after dyno print outs.

Thanks,happy Christmas.
Dyno? Tipper, The closest dealer is over 2 hours drive from me...

Perfect opportunity for a road test !

viney266 · Post by **viney266** » Sat Dec 14, 2013 3:36 pm

and a good chance to fit snow tires and report on those too!

slotrod65 · Post by **slotrod65** » Fri Jan 10, 2014 4:35 pm

Well, I received the GPR exhaust system. It sure looks smart, and it cam in these neato bags:

The tag on the exhaust can has a serial number, and my name as the customer. All of the parts fit together nicely.

jimmbomb · Post by **jimmbomb** » Fri Jan 10, 2014 4:52 pm

Very nice. We know that youll document the install for us and video it running...
Will you re-jet, Slotrod?

SockyTX · Post by **SockyTX** » Fri Jan 10, 2014 5:06 pm

Slotrod- ya gotta keep us posted, that set looks sick. The only performance mod I've considered for Stella is exhaust. Do tell if it's a simple as it looks or if other measures are required and how you tweaked the set up(jetting or what evs)

slotrod65 · Post by **slotrod65** » Fri Jan 10, 2014 6:05 pm

I will certainly document. GPR has an installation video on their website:

http://www.youtube.com/watch?v=Xx8S-iPrbtk

I have test fit everything, and as long as it mates to the exhaust flange on the Stella, it should be relatively painless. (Now I have jinxed myself.)

As far as plugs and jetting, that is sort of trail and error, no? I have no qualms about doing it, but I sure wish I wasn't the guinea pig!

az_slynch · Post by **az_slynch** » Fri Jan 10, 2014 6:51 pm

Very classy setup! The GPR is a must-have once I pick up my 4T. So close!

Tipper · Post by **Tipper** » Sat Jan 11, 2014 10:29 pm

I'm jealous ! I really hope they make one for the 200.

jimmbomb · Post by **jimmbomb** » Sat Jan 11, 2014 11:33 pm

Tipper wrote:I'm jealous ! I really hope they make one for the 200.

haha, I wish I could get my hands on a 2O0 4t here in the good old US of A

viney266 · Post by **viney266** » Tue Jan 14, 2014 4:19 am

yeah The GPR look good, can't wait for feedback.

Tipper · Post by **Tipper** » Tue Jan 21, 2014 12:25 am

Good news !

A dealer over here is building a pipe similar to the GPR for the 200 and is going to send me the prototype for testing

slotrod65 · Post by **slotrod65** » Tue Jan 21, 2014 12:38 am

Excellent news!!

listless · Post by **listless** » Mon Feb 03, 2014 2:47 pm

Anything new to report on the GPR exhaust?

It is sounding like my welded-together stock exhaust has started to spring another leak and I need to make some decisions soon.

I'd hate just just buy another crappy stock one...

(and I seem to be the odd one out who actually wants a very quiet scooter)

jimmbomb · Post by **jimmbomb** » Wed Feb 05, 2014 1:53 am

listless wrote:Anything new to report on the GPR exhaust?

It is sounding like my welded-together stock exhaust has started to spring another leak and I need to make some decisions soon.

I'd hate just just buy another crappy stock one...

(and I seem to be the odd one out who actually wants a very quiet scooter)

Pull your muffler off (again).. run it to the corner auto body shop and have it welded up again.... cheapest option...
then go and get that bad ass GPR.....
keep your re-welded stock as a spare for when the GPR starts to rot away.
good luck

Tipper · Post by **Tipper** » Fri Feb 07, 2014 4:33 pm

Here's the first photo of the Tasso exhuast for the 125/150, its a simple straight through design and it sounds great.

He is going to make a few finishing touches (welding on some studs to bolt the stone guard to and beefing up the swing arm bracket a bit. Its a steal at £95 ($155).

Tipper · Post by **Tipper** » Sun Mar 16, 2014 7:25 pm

Any news on the GPR ?

The Tasso race pipe has just been released for the 125/150.

jimmbomb · Post by **jimmbomb** » Sun Mar 16, 2014 7:35 pm

His Bike must be still covered in snow and he didnt bring it inside to his back room..

slotrod65 · Post by **slotrod65** » Sun Mar 16, 2014 11:07 pm

I shoveled out out the shed last week... then we got more snow and ice...

Grrr...

Post by **ericalm** » Mon Mar 17, 2014 3:09 am

Tipper wrote:Here's the first photo of the Tasso exhuast for the 125/150, its a simple straight through design and it sounds great.

He is going to make a few finishing touches (welding on some studs to bolt the stone guard to and beefing up the swing arm bracket a bit. Its a steal at £95 ($155).

I just bought one. $237USD shipped, which isn't quite a steal but still less than other options.

It was a roll of the dice for me. I was really hoping a Sito would magically appear before me but no luck.

I don't give a monkey's butt about sound. I only care about performance. I'm not going to dyno to ($$$) but will see for myself how it does. I'll probably up the jetting, maybe try a couple to see what happens.

Stilts · Post by **Stilts** » Mon Mar 17, 2014 3:46 pm

So we'll have two reviews from regular contributors up shortly (fingers crossed)! YAY!

slotrod65 · Post by **slotrod65** » Mon Mar 17, 2014 4:39 pm

Yeah, the install is getting closer. If the weather stays in the mod 40's this week like it is supposed to, I will install the battery and wake the Stella up from her winter's nap. Then I have to do my first service, and then comes the exhaust install.

Does anyone have any thoughts about the need for rejetting??? Is pulling the plug the best way to tell, like a 2 stroke?

az_slynch · Post by **az_slynch** » Mon Mar 31, 2014 6:27 am

Happened to look at ScooterWorks, saw this blog entry. They're working on a prototype pipe, apparently. I like the look of it:

Here's the blog post that mentions it.

I also like how they put an OG Stella hub up front on this 4T. That's on my list for my bike when I get it.

Tipper · Post by **Tipper** » Mon Mar 31, 2014 10:58 am

I love the look of that rack ! (Pun intended,deal with it).

clayjo · Post by **clayjo** » Mon Mar 31, 2014 1:23 pm

Green Machine is beauty..

Wondering if any of these 4T exhausts will fit the Automatic? My guess is probably not, but hopefully Scootwerks will properly note in their product descriptions

slotrod65 · Post by **slotrod65** » Mon Mar 31, 2014 1:35 pm

That old style front hub intrigues me. I am not a fan of the way the star hub looks. Does anyone have a clue what would be involved in adding this style front hub to a Stella?

Modern Buddy

Stella 4T exhaust, lets discuss

Stella 4T exhaust, lets discuss

Re: Stella 4T exhaust, lets discuss

Scooterworks Getting into the Exhaust Mix?