2nd gen single plug Zlock Rods Spears hi-compression 81mm pistons 1g cam swap Adjustable cam gears Lightened fly wheel (fully charging) Lightened starter sprag. 7 race weekends on motor At rebuild:heads refreshed; Transmission gone through, bottom-end bearings replaced. motor is on stand and available in central NJ 07040 $1175 was ran and tuned on pump gas with bored TB and open air box