Quote:
Originally Posted by Jakobi
The CHN needle that comes with the bike is what they use in the restricted models (closed airbox, cat converter in the pipe). Its way too lean to use with a normal setup.
On top of the carb cap you will see a number printed in a circle. 36/38. This is the carb size. Some shipped with the 36's and will make a big difference in your jetting specs.
What temps are you riding in?
I'd personal start at minimum with a 42P and a 172Main to be safe, and then lift the clip on the needle one spot at a time until things clean up and feel crisp. A fat pilot won't idle and will burble on low throttle but should clean up coming into the needle and will be noticable if it needs to go bigger or smaller based on AS adjustements. The fat main will be noticable around WOT. The needle position has the biggest effect at 1/4 throttle.
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The carb is a 38mm temps around 70deg. What needle should i get? Will most moto shops carry needles for the keihin carbs? I am a car/truck guy trying to learn motos. Thanks for the help.