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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
makin a trail friendly yz250
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[QUOTE="Tom68, post: 1310456, member: 80663"] You have several options, be absolutely sure you know where you need to reduce power and where you need to increase it. Increasing bottom end can also inrease the power band hit and make the bike harder to ride, If you try to get more top end at the expense of midrange that can smooth out the power and leave you with some up top for unexpected surprises on the trail. If you decide you want more power below the band you can retard port timing but that may increase the hit as well. Vortex makes a multi curve ignition unit which will help a lot but you may have to get all your mechanical mods soughted first. Eric Gorr's book has good info, Motorcross & Off-Road Performance Handbook. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
makin a trail friendly yz250
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