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Originally Posted by forthelove
I thought using anything other than manufacturer reccomended Octane fuel decreased performance?
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LMAO, ya thats what the race shop near me has told me many a times. Try runnin what the owners manual tells u, then try to bump up to 89, some bikes may run better with a higher octane fuel. 99 F4 Midgrade(89) fuel.
No hesitation, your jets maybe partially plugged, or plugs.