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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Bike runs wide open after closing throttle
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[QUOTE="MarkSims, post: 795231, member: 51091"] I went ahead and ordered a new cable, throttle return spring, throttle rotor, and throttle pulley. The throttle tube is an oberg sports twister and has a bearing inside. It turns smoothly and looks clean inside. I cleaned the carb well and I'm going to clean the tank, too. I'm going to pick-up a fresh can of U2 before the ride. I had a problem like this once before where the bike was acting the same way. The gas I was using was mixed a couple of weeks earlier. When I mixed up some fresh, the problem disappeared. I always thought that was due to water that got in the gas and was causing a lean condition by sucking up water when I would open the throttle - as Layton suggests. A new mix of gas didn't help this time - but it may still be due to a lean condition. When the bike surges, the front wheel comes way up and I think it is more powerful than it is normally - which also makes me think it is a lean condition. The pilot may have had some water or dirt in it. I couldn't tell what it was but I couldn't see light clearly through it until I blew it out. The carb bowl had some dirt in it also. It'll be the 17th before I can test ride it. I'll let you all know how it goes. If that doesn't fix it I'll have to start thinking about an air leak. Thanks for the help! [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
Bike runs wide open after closing throttle
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