Jetting & Timing for SIP Racing Exhaust on SS180

I have installed an SIP racing exhaust on my stock SS180 with a modification to the exhaust stub. Do you have any recommendations for jetting and timing for the new exhaust?

Thanks! drew?[?[]

Hi Drew,

I have done the same but with a added Vespatronic ignition kit. (highly recommend)

Awesome exhaust, great sound and better performance

Im trying to find out about jetting also

I will try a bigger main jet but don't know if I have to change the Air correction jet at the same time?


Cheers, Craig

Standard carb 27/23
SIP Racing exhaust Road #24163000
Vespatronic ignition #50004200
Engine has been ported
Jets I am using -
Main Fuel 120
Mixer Tube BE3
Main Air 160
Idle Jet 50
I'm going to increase my main jet size but unsure of matching up Idle jet and Mixer tube sizing?