Chainsaw Repair

Always thought you were a saw guy.
The 650 has alot of similarities to a 105cc Stihl 090 . Same 40 mm stroke . Cast iron liner like on my YZ125 can be oversized many times.
Whether you want it for a firewooder or a tuned pipe power bucker in a hot saw race. It has good  ergonomic potential for both.

too many different motors out there to learn for me to be a saw guy.

thanks.....will have to look into the 090.   

that's the rub.  for the yz, they make oversize pistons up to 0.080.  has a thicker liner.  great platform with cheap off the shelf parts.

my saw is past the wear limit, at least for me......0.006" after i hone it it will be a no-go with the stock piston.  there are no 2.25" (57mm) oversize that i can find that have a 5/8" wrist pin hole.  cannot find even a new stock one.  have to send the the piston out to get it built up to get things tighter.  still checking bearing listings to see if i could get by with running some other piston with smaller pin, but no luck so far.

-joe