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Honda MX & Off-Road Dirt Bikes
CRF450R Y09 - RECALL? - 1st Ride Report
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[QUOTE="Rich Rohrich, post: 1323874, member: 16241"] I'm not talking about the ignition mapping, I'm talking about the fuel curve mapping. The fuel curve is very sensitive to changes in the exhaust. The best information I have at this point is the stock fuel map is very crisp with the stock pipe. Changing the pipe will likely build lean areas into the curve and really flatten the power. It might be worth trying the bike with the stock pipe just to have a base reference point for modifications. It's a system (and a highly optimized one at that), and you have to approach modifications with that in mind. It's not like the old days. I'm not sure if that's good or bad though. :) Yoshimura has developed EFI piggyback systems for other applications so they might have a solution in hand for the 09 CRF already. It will be interesting to hear what they have to say. [/QUOTE]
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Dirt Bike Discussions By Brand
Honda MX & Off-Road Dirt Bikes
CRF450R Y09 - RECALL? - 1st Ride Report
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