i just rebuilt the top end on my bike, got it all together, put the choke on and it started second try. when i thought it was warmed up i shut the choke off and the bike died as well. and now it will not start again. its been two days. any suggestions?the only thing we can think of is that we know some two stroke oil go on to the rod and some of the parts under that. could that be the problem?

try changing the spark plug..

the spark plug is firing.. anything else?

Put a new plug in it anyways. clean your air filter and try again.

i had that problem to and its the plug even if its firing.

alright thanks. its running like a champ now.