Ring Cleaner Kit
Ring Cleaner kit
Motorcycle bogs down, backfires, sputters out?
1978Kawasaki KE125Enduro
Starts and runs fine for first 20 minutes or so. I mean I can go through every gear and it will accelerate like any normal running bike would. After I run it say 5 miles at around 40-45 mph or so, it will start to sputter and backfire. When I stop and go to take off again it backfires/sputters/bogs down in each gear at around 4000rpm in every gear. I have recently cleaned the carb, installed a new carb kit (main jet, jet needle, everything except pilot jet basically), replaced rings, cleaned piston/cylinder, tried using hotter plug, checked ignition coil, cleaned air filter. It only does this when I have been running it hard but it runs just fine prior to that.
this problem was present before I tried the above modifications
Was the main jet you replaced the same size as the original? It sounds like it's lean, did you get the right needle and is the clip in the correct slot? Better tear that carb down and swap the old main and needle in before you melt the new top end.
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US $6.10
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