TomONaBike
New Member
Hey. I'm not new, on my second bike, have done complete tear downs, solved blown gasket, bad magneto and other problems but I am at a loss. My engine was running fine, and then it backfired and slowed to a halt. Now it runs weak for a few seconds before it stops firing. I have trawled through the depths of this forum looking for solutions, and tried every last one that I could find. Let me review:
Spark test with plug against acorn passes but anyway I...
Removed kill switch
Cut crappy connectors and twisted black and blue wires directly
Cut off white wire
Resoldered blue wire and wire from magneto
Replace spark plug cap
Replace spark plug
Looked for air leaks (found none)
Removed cylinder top half and cleaned carbon deposits off top of piston
Sanded gasket and where it meets
Torqued down acorn nuts and plug
Disassembled cns carb, float working, jet in place, fills with gas
Idle screw in where I want it
Air/fuel screw at a good level
Poured out all the gas out of the tank and carb bowl
Replaced with fresh gas and oil at a precise 1:32 mix
And nothing. After it sits for a while, I can get it to run for a couple seconds then it silently quits firing or backfires once and is done. All I have left is to pedal and turn the engine over without hope of it kick starting back to life. I even tried running it down long hills, doesn't wake it up.
Any suggestions would be appreciated because I need this thing, have invested countless hours working on it, and I don't know what I have to fix or replace.
Spark test with plug against acorn passes but anyway I...
Removed kill switch
Cut crappy connectors and twisted black and blue wires directly
Cut off white wire
Resoldered blue wire and wire from magneto
Replace spark plug cap
Replace spark plug
Looked for air leaks (found none)
Removed cylinder top half and cleaned carbon deposits off top of piston
Sanded gasket and where it meets
Torqued down acorn nuts and plug
Disassembled cns carb, float working, jet in place, fills with gas
Idle screw in where I want it
Air/fuel screw at a good level
Poured out all the gas out of the tank and carb bowl
Replaced with fresh gas and oil at a precise 1:32 mix
And nothing. After it sits for a while, I can get it to run for a couple seconds then it silently quits firing or backfires once and is done. All I have left is to pedal and turn the engine over without hope of it kick starting back to life. I even tried running it down long hills, doesn't wake it up.
Any suggestions would be appreciated because I need this thing, have invested countless hours working on it, and I don't know what I have to fix or replace.