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Model Forum / Radio Controlled / Air Models / March 2006engine problem
I have recently bought a KTM 125 motocross bike. I got this bike cheap as it starts and runs but will not rev to its full potential. I have fitted a new plug, stripped and cleaned the carb, decoked the exhaust but to no avail. The bike starts first time without any trouble and will rev up to about 1/4 throttle but any more and the whole engine bogs down and will not rev any higher. By holding the throttle wide open it puffs and splutters and tries to blow the exhaust off, I believe this to be a backfire? does anyone have any ideas of where I should be looking to solve this problem. many thanks. nigel. > I have recently bought a KTM 125 motocross bike. I got > this bike cheap as it starts and runs but will not rev to [quoted text clipped - 7 lines] > anyone have any ideas of where I should be looking to solve > this problem. many thanks. nigel. You pro'ly should be looking towards rec.motorcycles.tech, mate.  SignatureHPT Sounds rich. Try leaning the upper end. mk >I have recently bought a KTM 125 motocross bike. I got this bike cheap > as it starts and runs but will not rev to its full potential. I have [quoted text clipped - 5 lines] > believe this to be a backfire? does anyone have any ideas of where I > should be looking to solve this problem. many thanks. nigel. Try a new glow plug? >I have recently bought a KTM 125 motocross bike. I got this bike cheap >as it starts and runs but will not rev to its full potential. I have [quoted text clipped - 5 lines] >believe this to be a backfire? does anyone have any ideas of where I >should be looking to solve this problem. many thanks. nigel. Maybe you need a smaller prop. :-) >>I have recently bought a KTM 125 motocross bike. I got this bike cheap >>as it starts and runs but will not rev to its full potential. I have [quoted text clipped - 7 lines] > > Maybe you need a smaller prop. :-) Don't cha just hate it when that happens? <G> Ed Cregger >I have recently bought a KTM 125 motocross bike. I got this bike cheap >as it starts and runs but will not rev to its full potential. I have [quoted text clipped - 5 lines] >believe this to be a backfire? does anyone have any ideas of where I >should be looking to solve this problem. many thanks. nigel. rec.motorcycles.dirt would be a better place to ask. In the meantime, make sure the intake isn't plugged, airfilter is clean. This is a classic symptom of not enough air/running rich. 2-stroke or 4-stroke? (Guessing 2 since it's a 125) Make sure the reeds are closing and sealing properly as well. Smaller prop? Check the clunk for gunk. >I have recently bought a KTM 125 motocross bike. I got this bike cheap > as it starts and runs but will not rev to its full potential. I have [quoted text clipped - 5 lines] > believe this to be a backfire? does anyone have any ideas of where I > should be looking to solve this problem. many thanks. nigel. |
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