I just had some WC-1 flywheels shaved and balanced by Bill Green.What a difference in them!They were 6 pds per flywheel and are now a little over 4 pds.i'm getting quicker acceleration,less dead wieght and no vibration anymore! 2 are for the 99 and 1 for a 2000. One of the 99 has the WC-1 cylinder with heat coating on piston,valves, combustion chamber,exhaust port and outside cylinder coated with 99.9% pure aluminum.Temps are about 300 degrees.alot better than 500+. the other 99 has the NE kit that came out in 2004.the 2000 was the first to get heat coated back in 2007.here's some pics. Ray