Could someone tell me what could be wrong. I have a rancher 350 w/ and fmf megamax II pipe with no jet kit. the bike has about 3500 miles (hard miles). It is smoking now. Could it be rings or valve guides

 

it could be rings does the qaud smoke all the time ? It is more likely that it is ring sif the smoking stops after the engine is warm. This is because the piston and rings expand when they get hot and this stops the oil getting up into the cumbustion chamber it could be valve seals which would smoke all the time. Hope I have helped