my father's kriss1 now aged 17yrs edi ('93).. engine never jam, never need overhaul at all (at least not yet).. just jaga the oil, chain, sprocket, tayar etc a.k.a normal wear & tear parts.. i usually full throttle it as im quite a speed-freak during my teenage era.. now the bike passed to my bro he's using it for ride to work everyday 60km no problem until today.. where got modenas bike no quality 1?? kawasaki technology maa..