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Yamaha MX & Off-Road Dirt Bikes
Acc. Pump Tuning?
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[QUOTE="jmics19067, post: 713585, member: 27963"] Good question Fark, I have been trying to help a buddy of mine tune up his 450quad and have been running into the same question of jetting or acc. pump. what I have learned is the airscrew does make a big difference and what I tried to do is run the bike at a steady throttle,in the different carb circuits, and load the bike down by dragging the brakes.Then seeing how well it picks back up while maintaining the steady throttle to try and eliminate the acc. pump. sorta Mickey Mouse but I have been able to succesively tell him that he is drowning out the engine by stabbing the throttle open with acc. pump and to start rolling the throttle open instead of just whacking it open. ooops sorry fuel screw!!! :eek: [/QUOTE]
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Dirt Bike Discussions By Brand
Yamaha MX & Off-Road Dirt Bikes
Acc. Pump Tuning?
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