So I am restoring a 1993 ZX600E-1 from tires to wind screen, I have everything under control so far but I need an engine someone left the carbs off and the valves are extremely rusted now, so there is probly no salvaging them so F it I want to get another engine and I know these engines are NOTORIOUS for 2nd gear problems so why chance it I bought it not running. My question is what engines and year gaps fit this frame as a bolt in ??? 93-00? Any suggestions please share. Thanks !!