Main jet thread

[Skydog]

Man can not wait to get my wide band on to see what it says! Sled runs great!!

Skydog

 

[Silverbullet]

ttt

 

[HYERUP]

170 mains, 6000', silver holzman springs in carbs

 

[Freak]

142.5 mains and still a little lean at 20lbs but getting better.

 

[Silverbullet]

Guys you need to add how much boost you are running so that the jetting makes some sense

 

[Turbo Tim]

Cpr turbo 14 psi 130 mains with GP1 exhaust .....140 mains after going to straight pipes .
Bender turbo 14 PSI 127.5 mains ........3000-6000 feet

 

[Skydog]

Yea put 22.5 pilots in way to fat! Think i will stick with close to stock! 1 1/2 turns on fuel srews. 135 mains fat up top mid good! Needles up one!
Bender kit 500 bender jet.


idle 11.00
2000-6000 rpm 10.2-10.5!!
7000-9000 rpm 12.0 12.5
WOT 10.8-11.0

Skydog

 

[Skydog]

11-12psi

 

[rxrider]

I have the 22.5 pilots in now. I started out with a 55/110 spring and engagement of 5000 it was no problem. Now I have a spring with engagement of 3500. It is soft at bottom (too rich I guess) until it goes into the needle part of fuel delivery. I will go back to stock 17.5 pilots. With the MCXpress rear mount, stock 135 main jetting is OK upto 14 psi boost, according to MCXpress.

 

[Skydog]

((go back to stock 17.5 pilots))

Same here!

 

[rxrider]

I will, gas milage was not any good either, 8.4 MPG. I did ride in difficult terrain a lot at low speeds, then some lakerunning WOT and met my friend and he wanted to race me cause he hasn't had any competition this winter. Well he did tune his clutches and used me as a bench mark. We did 10 660 ft passes in total, guess we did burn some fuel. Still waiting for the Supertips to arrive.

 

[Jonny Rocket]

135 mains, 17.5 pilots w/2 turns out on screw. 10 psi. Bender titanium. Thinking about going to 137.5 Mains.

 

[rxrider]

Went back to stock pilots 17.5 - It was too fat, hard to start and too much thottle chop with the 22.5 pilots in. It is running great now at 10 lbs boost.