After some searching on this site and others, I am still not clear on the best method to rebuild my yz400f top end. Sorry if I simply missed it. The bike is still running good but the time is near. I'm looking for better but reliable performance. So:
Rebuild w a Weisco or JE piston at 12.5 or 13.5? It runs hot already.. Hotter @ 13.5 I assume?
Is the 450 piston in a 400 case a reality? Do I need a new cylinder jug or just a bore to do do this? What is the resulting compression ratio?
Any recommended cams for slower speed use? Yes I know it was a motocrosser, but I like that (what feels to me to be a ) 1200 to 12000 linear power band.