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[QUOTE="yamalast, post: 1228859, member: 21518"] Well since this came up... I'm riding an '07 YZ250, stock except for a 1/8" pipe spacer & jetted for crisp response on 93 octane Sunoco pump @ 32:1 Yamalube. It runs great but is on the edge of detonation at 1/4 throttle or so in fourth and fifth in deep sand, when kinda rolling the throttle on. With colder temps coming to central Florida I need to cost effectively raise my octane a bit without giving up any crispness in throttle response. What's my best way to do this? Thanks. (BTW I sent you an email Rich, don't know if I did it right as I had a little PC issue :ugg: ) [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Race gas
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