SOHC.co.uk Forums > CB350/400

Blown piston - best way forward

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Andrewd2667:
The no 3 piston has blown with what looks like piston ring split and damage, along with excessive carbon.

How much damage to barrel - before you have to re-bore?

looking at all the pistons is it a case of replacement for all?

kevski:
Any bore damage will require a re-bore, there is no other fix!

Bryanj:
Used to be common on 175/250 twins if pushed hard from cold

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