SOHC.co.uk Forums > CB350/400

Petcock size on new tank?

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stevush:
Well after sterling service for 40 odd years my F2 tank started leaking so I've bit the bullet and bought a new one from DS. The description on their site says that the tank requires the USA type F2 petcock, otherwise order part number  16950KCPJ01 (£62.40 inc VAT). 

I assumed that this is the 20mm tap, great! the old one should fit but no. The new tank has arrived with the threads on the tank measuring approx 14mm I thought that Honda petcocks were all either 16mm or 20mm. Plenty of replacement 16mm petcocks around on ebay and there are some 14mm around £20 is this what people are using ? Anyone had the same problem ?

Thanks
Steve

stevush:
The picture is showing the threaded section that's welded into the tank, any petcock would have to match those threads at approx 14mm

Thanks
Steve

McCabe-Thiele (Ted):
My tank has a brass part that sits between the tank boss & the Petcock do you need one of those parts ?

stevush:
Thanks for the reply. I wasn't aware that there was a brass reducer to go between petcock and tank, I assumed it was just a straight fit.
Unfortunately I've had to get back to DS today, the tank doesn't fit! Its too narrow and the front  where the tank rubbers locate and wont go over the spine of the frame. I think I'll see where we go from here with DS first then I'll PM you if I need the part as you suggested.

Many Thanks
Steve

Athame57:
Hi Stevush
The DSS tank is a copy of the US spec, I have one myself, you do need to order the petcock as well. I had trouble making my tank fit at all, I seem to have been the first to buy a tank at least from the batch involved. What needed to be done was to shave a few mm off the two circular rubber mounts on the frame so it can slide on, they had to get a mechanic to identify the problem at their end, it seems obviously it wasn't the perfect replica! OK... ;D

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