SOHC.co.uk Forums > CB500/550

DSS .25 pistons not correct size

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Trigger:
Pistons and rebores can be a problem with some engineers when it comes to these old girls.
If the pistion is 20% silicone and you rebore to Honda clearances, it will be a tad too tight once the engine is up to temp . The clearance in the Honda Manuel is only for Honda OEM pistons. A lot of the aftermarket ones are out of weight with each other so, they have to be weight matched and matched to the bore  ;)

Laverda Dave:
I think you have the answers. SRS are good especially Michael the owner (tall young guy with a beard). If he works to be the Honda specs (he rebored my CB250RS after its blow up and it now runs absolutely great) and uses Triggers advice you should be fine.

eight0:
Always amazed by the combined knowledge of this forum. Thanks again for the advice.
Glad to hear SRS are known here too, thanks Dave.

Lesson learnt for next time.

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