Yamaha Big Bear 350 (1996)

[dogboystoy]

OK, I know the top end needs a rebuild because it smokes, meaning its burning oil. I havent cheked the compression yet but I bet it needs a new piston and rings.

Now, Lets say it just needs to be honed (no scoring on the cylinder walls). Well, I can just buy a stock size piston and rings right? I mean the rings on the current one are probably just shot right?

 

Now If I need to have any scores bored out (which I am hopeful that there are none), then what do I do? Do I have it bored out 20 over (if that removes the scores), and then buy a piston 20 thou. over stock size?

I have never done this myself before and want to make sure that I start out in the right direction.

Thanks in advance

 

[banshee890]

I think so but im not positive