"tomcas" wrote in message
...
jtaylor wrote:
"Steve Walker" wrote in message
news:4fFxf.24909$em5.17566@trnddc05...

Awhile back there was a discussion about a 4 cylinder 250. Here's a link
to video of a 6 cylinder 250cc Honda.

http://video.google.com/videoplay?do...091875&q=honda



I remember reading an article about that engine.

(No rockers, cam drove the valve stems directly.)

You can't get any less valve train mass than that. It must of had a very
high rev limit before the valves started to float.


The RPM's were probably high for that era, but have you ever checked the red
line on a '06 Yamaha R6? Max HP is at 14,500 RPM! Red line is 17,500 RPM.
This out of a production bike, with a warranty!
Greg

--
PoorUB
'05 Ultra Classic