OP
@popgunandy avatar
UTC

Hooked
61 VBB 76 Rally 200 79 P200 80 Sport 100
Joined: UTC
Posts: 288
Location: Folsom CA
 
Hooked
@popgunandy avatar
61 VBB 76 Rally 200 79 P200 80 Sport 100
Joined: UTC
Posts: 288
Location: Folsom CA
UTC quote
I recently installed an SIP 3.0 exhaust and changed my P200 to a 120 main jet to complement it (I made no other changes). It's not delivering quite the over boost I hoped for (though I'm happy) and I was wondering what jetting others are using with it.

If you have a 3.0 how did you jet your carb? I've got a standard 24/24 carb. The 120 should be enough but maybe I should change out the idle jet and boost the main jet further...122? Did you change your timing?
@mjrally avatar
UTC

Veni, Vidi, Posti
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
Joined: UTC
Posts: 5078
Location: Oceanside, CA
 
Veni, Vidi, Posti
@mjrally avatar
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
Joined: UTC
Posts: 5078
Location: Oceanside, CA
UTC quote
4-6 points higher is what's usually recommended.

What part of the rev range were you hoping to clean up? If you're looking for acceleration, do the heart mod to the air filter.
@christopher_55934 avatar
UTC

Ossessionato
2007 Stella 225
Joined: UTC
Posts: 3547
Location: Rochester, Minnesota
 
Ossessionato
@christopher_55934 avatar
2007 Stella 225
Joined: UTC
Posts: 3547
Location: Rochester, Minnesota
UTC quote
Re: SIP 3.0 Exhaust Jetting
Popgunandy wrote:
I recently installed an SIP 3.0 exhaust and changed my P200 to a 120 main jet to complement it (I made no other changes). It's not delivering quite the over boost I hoped for (though I'm happy) and I was wondering what jetting others are using with it.

If you have a 3.0 how did you jet your carb? I've got a standard 24/24 carb. The 120 should be enough but maybe I should change out the idle jet and boost the main jet further...122? Did you change your timing?
What exhaust did you start with?
DoubleGood Design banner

Modern Vespa is the premier site for modern Vespa and Piaggio scooters. Vespa GTS300, GTS250, GTV, GT200, LX150, LXS, ET4, ET2, MP3, Fuoco, Elettrica and more.

Buy Me A Coffee
 

Shop on Amazon with Modern Vespa

Modern Vespa is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to amazon.com


All Content Copyright 2005-2024 by Modern Vespa.
All Rights Reserved.


[ Time: 0.0236s ][ Queries: 3 (0.0015s) ][ Debug on ][ 313 ][ Thing One ]