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Try polishing the exhaust port, you can also enlarge it in different ways to get either top end or bottom end power but that's better done by an experienced engineer. Also some exhausts are fitted with restricters so an aftermarket exhaust will help, then upgrade your jets in the carb, put a good airfilter like a k&n. Good Luck

Try going with a smaller tooth sprocket in the front and a larger one in the rear. It will give you faster accelleration, but lower top speed.

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โˆ™ 2011-09-13 05:04:30
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Q: How can you give a 1999 yz 125 dirt bike more acceleration or power?
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Related questions

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The most powerful dirt bike is the Honda CRF 450,It's power is rediculous!

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A Dirt Bike is considered a vehicle.