Quote:
Originally Posted by skrymir69
.... I have adjusted it down and up. The adjustment works fine. Its just a problem after it warms up.
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Pull your plugs an see what they look like, also observe your exhaust smoke and a smell of unburned gas. An engine that performs better when cold but then it's performance drops as it warms up, can also be typical of a engine that's running too rich.
Any other mods to the bike? Carbs, airfilter, exhaust?