Author Topic: CB750 k6 pistons  (Read 165 times)

Offline zzphilzz

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CB750 k6 pistons
« on: July 16, 2026, 06:19:35 PM »
Hi, has anyone any experience of the 392 type IMD pistons when installed in a 300 type cylinder block? Slightly higher compression and supposedly ok in UK supplied bikes.

Offline Skoti

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Re: CB750 k6 pistons
« Reply #1 on: July 16, 2026, 07:44:40 PM »
Yes,

but not exactly addressing your question.
 

I bought a low mileage cylinder block with 300 type pistons from the USA, which replaced the 392 higher compression pistons and rust damaged cylinder block on my UK F1.

Every thing fitted OK and performance seemed similar.


Hope this helps.
Skoti


Motorcycling is Life, anything B4 or after is just waiting...

1976 Honda CB750F1