Are you rebuilding the complete engine?? Replacing the crankshaft and all that stuff or just doing the top end? The price on the crank will ruin your day for sure. If I have to do a 951 I'm sending my crank to Competitive Crankshafts. I've never used them but had some dialogue with the guy. I'm comfortable giving him a try. For the rest of your parts, I deal with Bay Area Powersports but lots of vendors will have the parts. Check prices on ebay also. Good Luck !! Post some pictures.