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Author Topic: Cb400F 1975  (Read 129 times)

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Offline chrisbc55

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Cb400F 1975
« on: December 26, 2024, 02:05:10 PM »
I’m just getting my mechanic to bore the cylinders to 0.5 over
The bores at present are clean but out of spec for 0.25 which they were bored to previously by PO
What piston to cylinder wall clearance is recommended? 0.9thou?
Cheers
Chris
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Offline Tim2005

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Re: Cb400F 1975
« Reply #1 on: December 26, 2024, 02:19:43 PM »
It depends on what your piston manufacturer recommends, 0.9 thou is often recommended for genuine Honda ones though.
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Offline chrisbc55

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Re: Cb400F 1975
« Reply #2 on: December 26, 2024, 04:44:45 PM »
Thanks
Yes they are genuine pistons and rings
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