This saw is a ms 650 with a 066 engine cover. Randy cut the cylinder for me but no porting has been done on this cylinder. Compression is 170 and it runs very well with just the cylinder base and combustion chamber being cut. It also has a new meteor piston and rings in it along with a dual port muffler. I sold this saw to Beau aka NewToStihl who sold it to his friend. His friend needed money for something so I bought it back. I don't need it and thought what the heck lets trade it so let me know what you got. I would sell it also for 500.00 plus shipping
I cant get pictures to upload so send me a pm if your interested and I can email you pics.
I cant get pictures to upload so send me a pm if your interested and I can email you pics.