Temperature change make this big of a difference?

busakiller

Registered
So I was at the track and bike was working great one weekend. Temperature outside was a cool 55 degrees. The next weekend I go and the bike just falls on its face. Didn’t change a thing. Only thing changed was temperature. It was 80 degrees and humid. I checked clutch and plugs. Do I need to add more spring pressure to my 1st stage on the clutch. I’m running a rock solid hand slider clutch with 3 stages. It never dropped rpm before this weekend.
 
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