using the air filter cone that lancer sent with the carb
Re: carb
« Reply #5 on: May 28th, 2006, 10:34pm » Quote lancer Modify
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The factory air filter will definitely restrict air flow, I would advise using the aftermarket filter... it will help a good bit with more power and aid in your jetting job. The main jet needed will depend on the engine, carb, filter, exhaust, and ??. Go down one size at a time until the bike runs strong at full throttle without bogging down. Stop at that point on the main jet.
Then check the midrange ... which notch on the needle does it run best in the 1/4 to 3/4 throttle range.
Then the pilot jet setting that makes the highest rpm @ idle...should be between 1 & 2 turns out...less than 1 turn out and it needs a larger pilot jet...more than 2 turns out and you need a smaller one.
When tuning a carb, it is all about "throttle position", 1/4 or 1/2 or 3/4 or full throttle, not mph or rpm (except pilot jet).
For just getting a few jets to tune with you will do better getting them locally, it will save you shipping costs. If you are unsure of the jet size just pull them out and look...it is printed on the main and pilot jets. Sometimes a magnifyer is helpful.
This is a good place to review some tuning stuff.
http://www.mikuni.com/fs-tuning_guide.html