With an operating speed of 9,000 rpm versus the 290's 13,000, the Jonsie would need an 11-tooth sprocket to come close to the Mighty Farm Boss' chain speed and a 12-tooth to beat it, assuming same pitch chains...
Ford 832 - I'm NOT beating up on your saw, just having fun with math. Congrats on the new rig.
Hey Bump_r, I got a 49cc Partner 5000 that I will run against your 290 56cc-57cc, It runs 13,300 out of the wood stock with carb gov still attached. I will even run 3/8's chain to try and slow it down in the cut from all the drag.:hmm3grin2orange: