Thread: First Dirt Bike
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Old 05-15-2008, 10:20 PM   #29 (permalink)
tigmaster
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Ya, power to weight says a 450 should be just a bit faster yet we all know that isn't everything. My F4I tops out at 71MPH in 1st gear. I forget the math for my CRF450R. Probably like 30mph I believe. I did it once. I have an '06 with EFI of course (F4I vs. F4). It should however solidify the point that 450s are capable of pulling their gearing until the rev limiter. I actually watched a dirt bike race at the strip against a street bike. It lost but it was close. I also believe that gearing greatly helps out on the dirt bike in grabbing the holeshot. The F4I is a slow street bike compared to many, well 6hp less that a 600rr but still... However, it lacks power horribly down low. My girlfriend has a YZ300, I would enjoy that race. Anyway, some day I will get around to racing my bikes. Thanks for the info.
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--'03 CRF450r--
--FMF Pipe, Pro-Tech Revavle--
--Vortex Basket With Tusk Disks And HP Springs--
--Pro Taper Triple Clamps And Bars--
--Devol Full SP With Moose HGs--
--Renthal 13/50 With R1 Chain--
--Now It Is The End, Probably...--

--'06 CBR F4I--
--Bone Stock--

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