Norton Commando 961 Breaks Land Speed Record

[kevin_stevens]

Pushrods...

Yeah, I guess.  And not so much just pushrods, but the scarcity of pushrod performance motorcycle engines?

KeS

[1KPerDay]

Yeah, I guess.  And not so much just pushrods, but the scarcity of pushrod performance motorcycle engines?

KeS

PRODUCTION pushrod performance motorcycle engines. There are a great number of drag-race/performance houses who will be happy to build you a 150+HP pushrod harley clone engine. Nobody puts them in production machines becase:

1. cost
iv. longevity
9. water-cooled DOHC multi-cylinder engines make more power easier and cheaper and more reliably. They're just more boring.

[Galo]

And don't forget.....at 4320 feet above sea level, normally-aspirated engines are losing about 13% of their horsepower -about 3% per thousand feet ASL  

[dorklord]

Dang.  Not to deprecate, but the BMW S1000RR just went 196 in stock trim as well.  I wouldn't have thought there was nearly that big a difference - maybe 30mph, but not 60.    For that matter I'd have thought the Buell was faster than that, my stock 1125CR dynoed at 130RWHP at 130mph in 4th at 94 degrees ambient this summer.  Must be something in the salt.

KeS

 

Not sure how the liquid cooled, DOHC Buell 1125 motor is supposed to be comparable to a pushrod twin (air cooled, as well)?