01 Cr250r Fuel

Joined
Oct 24, 2003
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#1
I recently bought a 01 cr250r and i ran preimum fuel with a 32:1 ratio and it ran great. I just bought 12 gallons of 107 octane race fuel and i mixed it 36:1. When i took it for a test ride the bottom end was spiting an spattering (alot of hesitation). But on the top end it ran decent. Do i need to change the spark plug or jetts in the carburator? Thanks
 
Joined
Jan 14, 2000
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#2
sounds like water in the gas to me.. put some of that new fuel in a clear glass and see if it has water in the bottom of the glass (looks like bubbles). but then again, maybe that high octane made it run rich on bottom.