Need some help. Out of ideas.

[Diabloman]

Okay so. Was riding along. Engines been great so far. Had for while. Just moved it a bit for better seating on frame and leveling the carb a bit more. Mid throttle flatground. And it quits. Check my wires. Check killswitch, spark plug, coil looks good. Changed spark plug to be sure. Changed idle a bit. Both directions. Tried choke. No choke. Clutch is fine. We have gas going to carb. And at least enough to try to sputter a start. [Its got a blue 2 stroke oil. Just to be sure] tried a few more. Each ending with fair speed. Sputters. And an attempt to throttle a little. And it dies out to a stop. Or dies out immediately if the clutch get pulled. Not sure. Nothings loose. Unless internal. Granted after a shorter manifold few days ago caused me to level the carb from the stock offset manifold. Ive got a bit more vibrations going on. Will have to double check in daylight to be sure. But any ideas?

 

[WINDY CITY BOB]

Check for airleaks. I know its hard qjem it's not running But that's where I would start.

 

[Diabloman]

Okay. Turns out electrical. Weak spark. Fixed all that. Checked for leaks and there arent any. But everytime i start and goto pull the clutch it tries to rev all the way up. Even with idle screw set as low as i can. If choked it idles well but dies with throttle.

 

[crassius]

that means an air leak - probably right where carb fits on

 

[Diabloman]

Was the screw that holds my carb on the manifold. The spot for it to tighten was stripped a bit and preventing a good hold. Replaced and we're happy and the motors happy. Appreciate the help guys.

 

[crassius]

glad you got it working

 

[Diabloman]

Getting pretty good at tearing these apart and putting em back in better shape. Heh

 

[WINDY CITY BOB]

Sometimes its So simple And its rite in front of you. Its nice to have people like this to keep you sharp and learn from..

 

[Frankenstein]

Once I had the worse air leak I mean worst, I tried everything, tightening everything, putting rtv. On every last hole and nook and cranny, engine just kept reving out of control.

I tried different carbs, and intakes, i basically removed the idle screw, I richened the jet to make up for it and it wouldn't stop reving and it pissed me off for almost a week and then in the middle of an intersection I looked at my throttle body and the adjustment screw got loose and was way out, effectively acting like I had the engine at almost half wide open throttle...

Well that was certainly a learning g experience, almost drove myself off a bridge after I realized it was never an air leak after all.