SOHC.co.uk Forums > CB750

ART Pistons

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Seamus:
Thanks folks. Remeasured the bore at 74mm (makes 810 volume)

As for fireblades, I had a 929 and a 1000RR, followed by an SP2. so hopping up a CB 750 is not on the radar.

I like restoring bikes of my youth (Did a Commando and a Bonneville so far) and really liked the CB750 first time round, hence this one. I seem to recall that someone did an 810 conversion in the 70's. but I could be mistaken.

Thanks again for the info

Seamus

Bryanj:
Are you sure its 74 not 64, as you say many people did upgrades most sought after being the Pops Yoshimura ones

Seamus:
Sorry Bryan, it is 64mm. Been reading on the other site and there is lots on 70 odd piston sizes. Stayed in my brain.

Cheers

Seamus

Bryanj:
Thought so, the 70+ require bigger sleeves with block and case boring and one i did the block went porous so we had it stove enammelled black to stop oil seepage

Seamus:
Sound like an interesting beast. I guess it was a shade quicker than standard ::)

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