I went hunting yesterday on my 88 Honda 300 4X4, and never even had it at half throttle. when I got back from hunting and put it up, it ran fine, but I just started it up and it was smoking worse than it has ever had, and smelt like something was burning. I just rebuilt the top end in it last month. Please tell me what could be wrong with it. It hasn't been in any mud in a long time, and is kept in a shed.
Thanks in advance

 

check the oil, how was the motor broken in ?

 

It has the same amount of oil in it that it did when I checked it last week. It's been broken in for a while(I ride a lot), and was broken in mostly easily.

 

if you never had it past throttle, then the rings probably never seated right, try running the **** out of it but i doubt that will fix it this late in the game

 

well here in WV it's pretty cold, and I went out and started it up and let it run, and a lot of the smoke cleared up. in other words i think its because it's cold here. thanks

 

my bike, starts at -15 F with 0 smoke, air temp has nothing to do with it. if you let it warm up the smoking will eventually stop, bikes should not smoke period, believe whatever makes you feel better

 

Last year it would start up and not smoke in even colder weather so i'm not exactly sure