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Discussion Starter · #1 ·
when I first got my 300ex it would start right up with no issues, but either the temp got cooler or something else because all of a sudden it just wouldn't start, I could push start it and it starts fine but still needs like 10 minutes before it will idle, I cleaned the jetting and the valves seemed fine, I'm at a loss of what it could be because it used to start fine

(it has a 330 bore kit, it is jetted with a Mikuni carb, and a pro circuit exhaust)
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