carb help?

[AKRACER]

i put in the red line kit my self and the car still has a slight back fire. any thoughts?  

i cleaned the carbs before install.  thinking that maybe a diphiram is bad but hope to get some advise from others.


thanks

[VMS Motorsports]

Could be alot of things, idle mixture screw adjustment, fuel, sticking float, diaphram, carbs not synchronized, boot leak, wrong/bad plugs, barometric pressure, normal running of a 28 year old motor, etc.

[AKRACER]

sorry but putting on my other set of carbs the motor runs smooth.  hope that helps

[VMS Motorsports]

Are you running it with an air filter? If so, what type? How are your other carbs jetted?

[AKRACER]

rc2 dirt filter other carbs jet by hank scott with 120 mains and 160 air and 42.5 . never touched the idle air on them.

[VMS Motorsports]

Thats quite different than the Redline kit, plus they use different needles I believe.
May just need to do some tuning

[knoxracing]

Ya, the red line kit would not run a 120 jet. It would be a 125 0r more likely a 127.5 That configuration with the 42.5 and the 160 would be long track. I am not a fan of this carb set up.

[AKRACER]

thanks jim. ill play with it some more thanks for the help.