SOHC.co.uk Forums > CB350/400

250 Four

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SteveD CB500K0:
They seem to have their own Yahoo group...

https://groups.yahoo.com/neo/groups/cb400f/conversations/topics/4829

It seems to be run/organised by Rick Denoon (I think he is/was a member here - I certainly used to get his email newsletters)
Here's Rick's site: http://www.denoonsp.com/my-cb400f.htm

Also Kevin (TTR400) seems to be involved (he's here too).

AshimotoK0:

--- Quote from: SteveD CB500F on February 20, 2014, 06:59:38 PM ---Yep.

I remember it well.

As a 250 it was expensive and underpowered. But boy, did it look good!


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--- End quote ---

Are we talking about the same bike Steve..... this was just a bog standard 400F but with 250cc capacity conversion so that a learner could ride one.
I remember my CB250K2 HDT2J I found was 325cc (Read-Titan) , which I only discovered after I bought it (and stripped down in my student room!!!). It's still taxed, so wonder if it still has the conversion.

Back to the '250' 400/4.. wonder who it was who sold them. Possibly House of Wheels or maybe Read Titan.

SteveD CB500K0:
It was Jock Kerr. He did loads of weird stuff. My room mate at Uni had a CB125S with a 185 conversion.


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AshimotoK0:

--- Quote from: SteveD CB500F on February 20, 2014, 10:22:35 PM ---It was Jock Kerr. He did loads of weird stuff. My room mate at Uni had a CB125S with a 185 conversion.


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--- End quote ---

Ah Ha now I remember................Found this on another site ....

" Ah yes, those where the days when physics, metallurgy and customers didn't really seem to matter, cams could be ground by hand, Stellite was your friend and you always rely on Araldite to get you out of trouble.
I used to work there from 1977'ish to 1979'ish. It was in fact a Honda 400/4 with massive 25mm thick liners and C50? pistons taking it down to 250cc. We kept the original liners for when the rider passed his/her test. Just imagine the affect of this way out of design ba**ard child with its super low compression, 'slightly' imbalanced crank in the hands of a learner. I don't think any survived to be resleeved back? I personally nearly lost a part of my head when one of these was on ramp and being revved up (just to see how far it could go) after 2 minutes of top revs decided it wanted no more and promptly threw a rod through the case - and yes ..we did bolt a turbo onto a Gold Wing. It was an old (lorry) Holset turbo with a waste gate fashioned from an old radiator valve and bits from an old c50 - more smoke than the entire red arrow team and proving once more that Araldite (even when mixed with aluminium filings) is always weaker than piston alloy"

Cheers ... AshD

SteveD CB500K0:
You're not wrong. The 185 was held together more by hope and the fact that the 125 was quite well engineered.
Ian passed his test and bought a 400/4! I don't know what happened to the 185. I seem to remember that it only had one piston ring?


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