Let me tell you a (short) story...
It's about my bikes engine...
I started with only an engine....
which was sold to me by an older young man
who used to be in side car moto cross
he build a special 25 years ago
with a heavily tuned Kawasaki Z1 engine
but it apeard to be to powerfull
and the engine went out after just 2 races
as it seems, in the fist race a piston was that heavily damaged
that they had to rebuild the whole engine....
so after the other (2nd) race the engine landed in a (heated) shed
and was left there for more than 25 years
and today I found a picture of that engine still fitted in the sidecar cross machine thing
pictures overhere...
http://www.motor-forum.nl/forum/list_me ... 4#23813534