Loc Posted May 16, 2011 Report Share Posted May 16, 2011 So let me tell you what I built then we will find out what wrong 421 Cheetah Cub 34mm Carbs Noss Head 20cc domes timing at +4 So I get it together and heat cycle it and there are no leaks. I check the torque on the bolts and we are good. I take it for a quick ride. Nothing crazy just a steady easy ride in first, second and third. It runs for about 10 minutes then just dies. Will not restart. While riding I lost a pod filter and went for about 600 yards before I noticed it fell off. It was in grass and no real dust. Checked the plugs and they look good. Checked the fuel and it is good. Still cant restart. Compression is right at 140psi. Any help on what to check. Quote Link to comment Share on other sites More sharing options...
Zwiser Posted May 16, 2011 Report Share Posted May 16, 2011 (edited) maybe when your pod fell off i little piece of dirt got into your pilot jet, did you try cleaning the carb? also check your air/fuel screw mine turned in by its self on my blaster and it died once i let off the throttle and wouldnt start till i noticed it was turned in. Edited May 16, 2011 by Zwiser Quote Link to comment Share on other sites More sharing options...
Coupelx Posted May 16, 2011 Report Share Posted May 16, 2011 on a new build a couple things come to mind- 1-the flywheel key sheared off. 2- pickup coil loose 3- shorted wire or loose connection. Quote Link to comment Share on other sites More sharing options...
Loc Posted May 16, 2011 Author Report Share Posted May 16, 2011 So we have no spark. Guess I will start to chase this down Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted May 16, 2011 Report Share Posted May 16, 2011 well that can be a good thing.....as far as knowing its not a damaged cylinder. did you use a flywheel puller specific for atv's? if you use a jaw-style puller it will actually bend the flywheel and really screw things up. pull your cover and check things out. im believing that it either sheared the key or may have spun the retaining nut off. you should be using loctite on the nut and should be torquing it to 80ft/lbs. you can put it on with an impact also. do not use anything to stick in the wholes of it to try to hold it in place.....put the bike in 6th gear and hold the brakes.....or you can also take a penny and stick it in the gears to hold it from turning... Quote Link to comment Share on other sites More sharing options...
Loc Posted May 16, 2011 Author Report Share Posted May 16, 2011 I am going to take it apart today and check the flywheel. I used the puller from FAST to remove the flywheel, that thing is great. Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted May 16, 2011 Report Share Posted May 16, 2011 you should be able to run more compression if you want with running straight 100LL Quote Link to comment Share on other sites More sharing options...
Loc Posted May 17, 2011 Author Report Share Posted May 17, 2011 Ding ding ding................the winner was a flywheel nut backing off and shearing the pin. Fixed that bad boy and off we go. I must say I havent even really got to crazy and I am pretty sure this thing is going to rip. Quote Link to comment Share on other sites More sharing options...
Coupelx Posted May 17, 2011 Report Share Posted May 17, 2011 Ding ding ding................the winner was a flywheel nut backing off and shearing the pin. Fixed that bad boy and off we go. I must say I havent even really got to crazy and I am pretty sure this thing is going to rip. just hit the nut with an impact once to make sure Quote Link to comment Share on other sites More sharing options...
camatv Posted May 17, 2011 Report Share Posted May 17, 2011 blue locktight is your friend!! Quote Link to comment Share on other sites More sharing options...
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