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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="MXTex, post: 795152, member: 17501"] Mark, Whatever you do, be very careful on that thing until you have confirmed resolution. I've crashed due to a stuck throttle and miraculously walked away virtually uninjured, but it could have been bad; real bad. It's the worst feeling I've ever had on a bike. With all this said, an engine needs air to rev as you have described. Yes, air leaks via gaskets or blown seals can make a motor surge and run lean; but not rev like wide open throttle. Simply not enough air. To this end, I would focus on what could inhibit that throttle slide from closing. Sounds like you're on the right track. Replace the throttle cable and ensure proper routing. Clean the thottle tube assembly and ensure free/smooth operation. Make sure the carburetor is surgically clean and that the slide and slide bore are in good condition. And for added safe measure, I now install vent tube canisters on all my bikes in order to eliminate the possibility of sucking dirt into the carb and possibly creating a jam in the needle main jet bore interface. With all this done, ride very carefully with your finger on the clutch at all times until you're positive of resolution. Then ride with confidence but keep your finger on the clutch anyway. It's safer and better riding technique anyway. Good luck and be very safe. Stuck throttle condition must be respected. [/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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