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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
IT465 vs YZ465
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[QUOTE="Joe in Florida, post: 1223531, member: 72877"] What I have is an 87' YZ 490 that I race on a gokart and am trying to understand the effects of the port timings to power ranges. I would like to be able to get more bottom end torque. If anyone can help, I would appreciate it very much. [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
IT465 vs YZ465
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