4millcub928 Posted March 1, 2013 Report Share Posted March 1, 2013 We just put together a 4mill cub with a cool jead and 19cc domes and 38/41mm carbs flat slides it idles fine launches good but dies out after you shift running on methanol any help would be good thanks Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted March 1, 2013 Report Share Posted March 1, 2013 More details.. timming? Plug gap? Are you running the bowls dry? Gas cap vented well and pingle valve flowing rigjt? Quote Link to comment Share on other sites More sharing options...
Jereme6655 Posted March 1, 2013 Report Share Posted March 1, 2013 along with are you carbs converted to run alky? Quote Link to comment Share on other sites More sharing options...
4millcub928 Posted March 1, 2013 Author Report Share Posted March 1, 2013 The timing is set advanced 4 it has the dual pingle valve oversized bowls and the cap is good tried 3 different ones Quote Link to comment Share on other sites More sharing options...
4millcub928 Posted March 1, 2013 Author Report Share Posted March 1, 2013 And the carbs are converted to alky by k&t Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted March 1, 2013 Report Share Posted March 1, 2013 tried 3 different ones? you only need one with a 1/16" hole drilled in the top to let plenty of air in it. your timming can easily be advanced to 7-10* Quote Link to comment Share on other sites More sharing options...
4millcub928 Posted March 1, 2013 Author Report Share Posted March 1, 2013 Do you really think the timing would be the reason it dies after you shift or just lack of fuel I'm not to sure this bike has just been a huge headache lol ill try moving the timing right now Quote Link to comment Share on other sites More sharing options...
Surfrjag Posted March 1, 2013 Report Share Posted March 1, 2013 Could be both. Check your plug gap to. I shoot for. 018"-.020 Quote Link to comment Share on other sites More sharing options...
4millcub928 Posted March 1, 2013 Author Report Share Posted March 1, 2013 Ill try gaping them right now thanks for all the help Quote Link to comment Share on other sites More sharing options...
possum Posted March 1, 2013 Report Share Posted March 1, 2013 dude just feed it some fuel and check what everyone else said. Quote Link to comment Share on other sites More sharing options...
4millcub928 Posted March 1, 2013 Author Report Share Posted March 1, 2013 I changed the power jets fuel lines and I guess that was is thanks for all the help Quote Link to comment Share on other sites More sharing options...
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