Sounds like your running lean. start with your main jet/needle adj. make sure the bike is pulling hard the WHOLE way to red. after you have that you can work the pilot jet and air fuel screw. Now do you have your air fuel screws 2 half turns out from dead bottom make it one full turn, or 2 full turns and one half from dead bottom. if you have not installed a jet kit there is where you need to start. and please dont forget to sync your carbs when your done.
If you can give me the jet sizes, needle settings and air/fuel screw setting. and we will get this worked out
M.Woodring
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