I just bought my first Blaster. I always liked how small, light and cheap they were. I am an automotive mechanic so I know my way around.

This Blaster needs a little work but I did not have enough to buy mint condition. My question is about a rebuild. I did a compression check on it and I got 90PSI. At 90 PSI the guage held steady and did not leak. The quad runs decent. From what I read on here its suppose to be 130-140PSI?

At 90PSI can you get away with just a re-ring or do you think I would need to rebore?

 

how does it start? and what year? u could prolly get away with a re ring and maybe at least hone it a lil, id take a bore gage and see where its at

 

I would tend to agree with 91Warrior357 and think that a hone, but I think I would throw a new piston in it while you have it apart. That is one of the main failures is the darn piston breaking.

 

Sorry for the second post but I was going to say that with that low of compression I would be pretty sure there is piston slop and it may already have some cracks in the piston waiting to go.