Posts Tagged ‘sc500’

This one could be a bit of a challenge, to restore and to ride. For now it is placed against the wall of the garage waiting its turn.

Everybody jabbers on and on about changing the powerband of a motorcycle engine. The scrambles boys want a bundle on top; the MX-ers want a nice, even spread.

Sooo, motors got ported, polished, reeded, drilled, stuffed, files, tampered, folded, spindled and mutilated in the never ending quest for the prefect powerband.

However, only one path has been found to that elusive Perfect Power-band: cubic inches. Or even better, cubic feet.

Yup. You can achieve bottom end, top end and even middle end, if the motor has a big cnough hole in it (and a piston to fit that hole).

Naturally, whenever we get a big-incher in for a test, we expect to be greeted by power. Buckets of power all over the place, Power from idle to peak revs. We expect to put the bike in top gear and go boom-boom-boom down thc road, digging trenches as thc engine barely turns ovcr.

A short while ago, Yamaha dropped off one of their new 500cc bikes at our offices. And promptly blew our preconveived notions about big-inch power right out of the lunch box. Read the rest of this entry »