Amittedly 4 strokes are getting up there these days power wise. But due to the lightened engine internals, things do not last as long as they did. The valves tend to stretch very easily and cost a fortune to service every xx hours. I know a dude, ex pro racer that has owned a 92 KX500 from new and has only late last year had to pull her down for inspection only. He shouted it a birthday while he was in there. Thats a pretty good run? Its had a lot of work. These bikes are torque monsters. But still have the top end rush. I've yet to see any 4 stroke get past me. Mines only lightly moded with FMF pipe V-Force2 reed block and mild porting. Reguarding oil for it, she runs on Ams100:1 which works out heaps cheaper cause you use half the amount of the other leading brand recommendations. (good ones 50:1) Mind you if you road racing you run a little richer to compensate for more W O T. In my mind 2 strokes, especially powervalved models, are gonna take a lot of beating.


LONG LIVE 2 STROKES.