engine wheight to power ratio

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xboxd83 · #1 Unread post by **xboxd83** » Thu Aug 16, 2007 12:16 pm

what motorcylce engine has the highest weight to power ratio so which one is the smalles and most compact but packs a punch

RideYourRide · Fri Aug 17, 2007 4:07 pm

A worked over big bore ring-dinger. KX500, CR500, various old school Husky or KTM death machines.

Fast Eddy B · Sat Aug 18, 2007 11:39 pm

Probably a tuned 250cc (or 500cc) two-stroke, like found in an Aprilia RS250, Kawa KR1-S, or Suzuki RGV250.

The RS250 put out 240bhp per litre.

You planning on bulding something?

atom · #4 Unread post by **atom** » Sun Aug 19, 2007 6:06 am

Why do you care?

While a high hp/displacement suggests advanced engineering, it usually means the power is concentrated in a narrow powerband which can hamper usablity.

If your considering th hp/weight for the entire bike, its a design priority for every sportbike. I haven't looked at the stats but the new Hayabusa might have the top hp/weight at the moment.