T125 right side cylinder trouble
Posted: Mon Aug 07, 2017 3:09 pm
Hi all,
Looking for some advice on what to do next. I have a T125 that only fires on the left cylinder at idle. When I give it throttle, the right cylinder kicks in but it appears very rich with much more exhaust smoke than the left side. Both carbs are adjusted in a similar manner. Floats have been set many times just to double check and carbs rebuilt. Both plugs are showing spark outside the cylinder. Checked for air leaks with a leak down tester and it held well. Compression in both cylinders around 110psi. Timing is set properly and confirmed with a timing light. I did try to switch the carbs and when i did the right cylinder started running fine and the left cylinder experienced the issues so the problem moves with the carb. Ive tried desperately to clean the carbs. Ultrasonic cleaner and soaking in chem dip. I've also blown everything with compressed air and tried piano wire for any small holes.
I'm hoping someone can explain to me why it wouldnt fire at idle but then fire with throttle but seems rich? I would assume it was overflowing that cylinder and not allowing the plug to fire at idle but somehow overcomes that up at higher rpms but with the float height set properly, i cant understand how that could be the case.
Any advice is greatly appreciated! I want to ride it!
Looking for some advice on what to do next. I have a T125 that only fires on the left cylinder at idle. When I give it throttle, the right cylinder kicks in but it appears very rich with much more exhaust smoke than the left side. Both carbs are adjusted in a similar manner. Floats have been set many times just to double check and carbs rebuilt. Both plugs are showing spark outside the cylinder. Checked for air leaks with a leak down tester and it held well. Compression in both cylinders around 110psi. Timing is set properly and confirmed with a timing light. I did try to switch the carbs and when i did the right cylinder started running fine and the left cylinder experienced the issues so the problem moves with the carb. Ive tried desperately to clean the carbs. Ultrasonic cleaner and soaking in chem dip. I've also blown everything with compressed air and tried piano wire for any small holes.
I'm hoping someone can explain to me why it wouldnt fire at idle but then fire with throttle but seems rich? I would assume it was overflowing that cylinder and not allowing the plug to fire at idle but somehow overcomes that up at higher rpms but with the float height set properly, i cant understand how that could be the case.
Any advice is greatly appreciated! I want to ride it!