Quote:
Originally Posted by Alberto17
What is the difference between those 2 in terms of bike performance?
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There's no difference in performance between the AS1 and AS2, both will work great on your bike...
BUT it's essential to get your carb setup correctly, or it won't run correctly or may not even start at all!
Start with the basics, clean air filter, good spark plug correctly gapped, new fuel with good quality 2 stroke oil (usually 2% for full synthetic but check). Check rubber tube between carb and reed block, on older bikes the rubber can perish and split causing an air leak, it's not expensive to replace.
Then check carb, remove main jet and pilot jet, inspect/clean. The hole in the pilot jet is very small and can easily be blocked.
Remove float and float valve, clean/inspect. Rubber tip on float valve can look OK but on older bikes the rubber can harden and it doesn't seal so well.
Check float height, very important before you start adjusting jetting.
Once you've completed all the above start trying different jets. You said it ran good with your friends carb, try copying his jetting, it might not be perfect but should give you a good starting point.
Main things to concentrate on are... Main Jet, Pilot Jet, Needle and clip position, Air Screw.
Good luck, stick with it. Once you get it jetted correctly it'll be a great ride!
