Re: Advice Please - Spencer AMA bike

Posted by shinyribs on Mar 04, 2015; 4:35am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/Advice-Please-Spencer-AMA-bike-tp4055668p4055676.html

SeeDoubleYou wrote

1) I see that the CB750 DOHC produces about 70bhp and the CBX750 about 90bhp. So would a CBX engine drop into a CB frame. I can do mods if need be



Any view appreciated.  Thanks

A DOHC CB900F is claimed to make ~90hp and a DOHC 1100F makes close to 110 hp. Both of those engines will bolt directly in to a 79-83 DOHC CB750 frame. Never tell them apart unless you look close at the clutch cover and a couple other tiny clues. But being in the UK I'm not sure about your MOT allowing those kinds of swaps?