"Bart D. Hull" wrote:

Interesting,
Even looks like 4 valve heads. Too bad you can't really see
how the valve train was put together. (Shim over bucket,
shim under bucket or shim on valve stem.)

Still no reason for it to run so poorly down low. Lots of
race bikes are "race tuned" (pun intended) so they barely
run, but they sound cool. When they run properly they really
put out hp and torque. My parents used to run a motorcycle
shop since 1976 to about 7 years ago, so I've seen my share
of the aforementioned "race bikes".

Bart D. Hull

Perhaps you need to send your resumé to Honda? Perhaps
they are in need of your "expertise" in the field of
250cc 6 cylinder factory racers?

Tom