Hi all,
Im new to the forum, and I need help with my crf50 clone engine. It is a 50cc 4 stroke fully auto. It doesn't have gears or a kickstart, so I am relying on electric start to turn it over. I kinda bypassed some of the electrical, but it gets spark and turns over. I checked for compression by putting my thumb over the spark plug hole and cranking it, and it pushed my thumb out of the way a LITTLE bit. Timing is good, and I cleaned the carb totally including the jets, although I did not check the clearance of the float. The carb is a PZ19. Mixture screw is 2 turns out from being lightly seated. Air filter is clean (I am trying to start without air filter). I am going to clean the fuel pet**** tomorrow. It turns over and sometimes sounds like it wants to start, but it never does. I have sprayed starting fluid into the carb and it still does not start (I have also tried spraying into the spark plug hole). I also adjusted the valves at TDC to .0025 with the engine cold (NOTE: I originally forgot to set it to TDC and I adjusted the valves, but later I corrected this and adjusted them at TDC, does this matter?) I'm sorry for the long post, just trying to be as detailed as possible .
Here are my questions:
1. It didn't start with the original exhaust, so I tried a header from a similar bike, but it didn't fit, so the header is pointed forwards instead of backwards, is this bad?
2. How can I check for engine gasket failure without just rebuilding everything (last time I rebuilt a motor, it never ran again).
3. Does the flywheel case gasket matter?
4. Will the engine start without and exhaust gasket (copper ring)?
5. When I removed the carb and pulled the throttle cable, it did not spray gas, should it?
6. Is there a way to completely bypass the electrical so I just have the battery, starter, and coil?
7. Any ideas on why it won't run?
Im new to the forum, and I need help with my crf50 clone engine. It is a 50cc 4 stroke fully auto. It doesn't have gears or a kickstart, so I am relying on electric start to turn it over. I kinda bypassed some of the electrical, but it gets spark and turns over. I checked for compression by putting my thumb over the spark plug hole and cranking it, and it pushed my thumb out of the way a LITTLE bit. Timing is good, and I cleaned the carb totally including the jets, although I did not check the clearance of the float. The carb is a PZ19. Mixture screw is 2 turns out from being lightly seated. Air filter is clean (I am trying to start without air filter). I am going to clean the fuel pet**** tomorrow. It turns over and sometimes sounds like it wants to start, but it never does. I have sprayed starting fluid into the carb and it still does not start (I have also tried spraying into the spark plug hole). I also adjusted the valves at TDC to .0025 with the engine cold (NOTE: I originally forgot to set it to TDC and I adjusted the valves, but later I corrected this and adjusted them at TDC, does this matter?) I'm sorry for the long post, just trying to be as detailed as possible .
Here are my questions:
1. It didn't start with the original exhaust, so I tried a header from a similar bike, but it didn't fit, so the header is pointed forwards instead of backwards, is this bad?
2. How can I check for engine gasket failure without just rebuilding everything (last time I rebuilt a motor, it never ran again).
3. Does the flywheel case gasket matter?
4. Will the engine start without and exhaust gasket (copper ring)?
5. When I removed the carb and pulled the throttle cable, it did not spray gas, should it?
6. Is there a way to completely bypass the electrical so I just have the battery, starter, and coil?
7. Any ideas on why it won't run?