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SOHC.co.uk Forums => CB750 => Topic started by: Galea on December 06, 2011, 06:38:13 PM

Title: CB750 F2 cylinder head differences
Post by: Galea on December 06, 2011, 06:38:13 PM

Are there any external differences between a CB750 F1 and F2 cylinder head, apart from the black paint and different carburettors, which make identification possible with the assembled engine still in the bike?  I am quite wary of the bad reputation of the F2 head regarding the accelerated exhaust valve guide wear.

Title: Re: CB750 F2 cylinder head differences
Post by: Jerry Rxman Griffin on December 16, 2011, 04:29:11 AM

Top fin, intake side, next to #3 - look for "410". That would indicate a F2/F3. If you see "392" then it's a F/F1 or K7/K8. Neither then it's a K0-K6 in all likelihood.

Title: Re: CB750 F2 cylinder head differences
Post by: Rozabikes Tim on December 16, 2011, 10:44:14 PM

Rumour has it the F2 head also has "Cadburys" marked on it too.

Title: Re: CB750 F2 cylinder head differences
Post by: SteveD CB500K0 on December 16, 2011, 11:41:56 PM

That'll be "Kraft" then...

Title: Re: CB750 F2 cylinder head differences
Post by: Seamus on December 17, 2011, 05:27:14 PM

Are there any identifying marks on the barrels (block) as well? Just wondered as I have a set of barrels that I believe are from a later K bike (judging by the oil seal holes on top).

Title: Re: CB750 F2 cylinder head differences
Post by: Galea on December 17, 2011, 06:42:38 PM

Thanks Jerry, much appreciated.