Air cooled Honda DOHC woes

[Billy Balthorpe]

My CB 750 Nighthawk which i was going to use for a base for a Bobber is blowing smoke and has low compression on all cylinders, i was hoping against hope that it was the valves slightly propped but no, a squirt of some oil down the bore and the compression shot up to over 200 psi. Conclusion, bores are knackered. Its a shame coz the engine runs very sweet with no rattles, clunks or tapping. I've priced up the replacement pistons for a rebore from David silver and gave up when the total got above £500 for parts alone. So im thinking of putting a CBX750 motor in it. Has anyone had any experience of this or could anyone point me in the direction of a Honda forum which would give me some advice??

Anyway i'm off to put my head in the gas oven, i'm gutted, i MOT'd the thing a week ago as well!
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M.O.B. Successfully taking the piss since 2014.

[Nixon]

It knows what you wanted to do to it, so killed it'self, its an Omen! No bike willingly want's to be bobbed!

[Billy Balthorpe]

I dragged myself out of the oven for that!?

At the moment i've got a Streetfighter Blade and a standard CBR600FX. I wanted something else a bit different but not a V twin cruiser. The Shitehawk has the right shaped tank and lowered shocks are easy to get hold of and cheap, ive got all the bits to build it apart from the bars, its even got 12 months MOT.

A Honda DOHC Bobber would have done the trick, looks like ive got to find a tatty CBX with a good motor cheap now.

Plus i think it would look better as a Bobber than it does as standard.
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M.O.B. Successfully taking the piss since 2014.