Ok so the good ol TB i belive blew up today...the compression came bac at 90-93...it still should fire no? I noticed that it ran fine at first then i stopped added some gas and the thing started smoking BAD thick white smoke when ever i was giving it gas...then i stopped shut it off tryed to start it again but it wouldnt turn over..acted like it was sezied but after a lil bit i tryed again and it turned over...so i pulled the head off just to get a good look at the piston and it appered fine...so i bolted the head back on and tryed to turn it over again..it started to turn but after maybe 5sec of turning it stopped and smoke was comeing off off something near the primary cluch HELP ME!!

 

did the oil injection stop working and you seized it up. you'll have to pull the carb off as well as the exhaust manifold to see if the sides of the piston has score marks. also could be the crank bearing. either way 90 psi isnt really good

 

its not seized...it turns over...and when i had the head off the jug appered smooth as well

 

Ok so i just called my local shop...he said it sounded like kerosen insteda gas...and sence i did not fill the "gas" can u im gonna try draining the tank and putting fresh gas in it

 

You've got a blower on your trailblazer? LOL Piston Wiseco, $120.00. Bore, $40.00. Top end gasket set, $20.00.
Lots more power for a buck 80 not so bad. How long did the last bore job last?

 

i belive it was stock bore

 

That's pretty good, my last rebuild on a 250 Polaris was $450.00. That included everything down to the crank bearings.
I dropped the engine off though, did the R&R myself. They are great little engines. Doc

 

well ya see i wanna get it going good and sell and save for a z400 because my buddy has one and is sooo nice

 

could be stuck rings on the piston &/or bad crank bearings & crank seals, but
ya make sure there is real gas in the tank!!!!