The only one that I know of is an OREGON 9 tooth, but it run .325 chain. I wonder what that would run like. Less chain drag plus the 9 tooth sprocket. FAST. Let us know what else you find. I own an 066 too.
Hello stihltech,
You can get a 9 tooth, a 10 tooth, and a 11 tooth sprocket from masdens. they are racing sprockets and are 25.00 each. but I dont think that 066 will pull a 10 or 11 pin unless you have a turbo or nitrous. lol.
ken