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What size is the fuel line on CB400F2 / top engine breather pipe termination ?

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Nurse Julie:

--- Quote from: Macabethiele on August 28, 2020, 11:19:00 AM ---
--- Quote from: Bryanj on August 28, 2020, 10:15:19 AM ---5.5mm for fuel pipe, dont know about breather

--- End quote ---

Is that 5.5mm o/d presumably 3.0mm i/d any tips on whether it should be cotton braided or where to buy from please..

--- End quote ---
The main fuel pipe is 5.5mm ID and the carb overflow pipes are 3.4mm I'd. Non cotton braided, you can get everything from Planet Silicone on ebay.

McCabe-Thiele (Ted):

--- Quote from: Nurse Julie on August 28, 2020, 02:14:47 PM ---
--- Quote from: Macabethiele on August 28, 2020, 11:19:00 AM ---
--- Quote from: Bryanj on August 28, 2020, 10:15:19 AM ---5.5mm for fuel pipe, dont know about breather

--- End quote ---

Is that 5.5mm o/d presumably 3.0mm i/d any tips on whether it should be cotton braided or where to buy from please..

--- End quote ---
The main fuel pipe is 5.5mm ID and the carb overflow pipes are 3.4mm I'd. Non cotton braided, you can get everything from Planet Silicone on ebay.

--- End quote ---

Thanks I really need to get my head round metric sizes as they mean little to me so its 5.5 mm i/d not o/d. lol

Bryanj:
You got a Honda so EVERYTHING is metric

McCabe-Thiele (Ted):

--- Quote from: Bryanj on August 28, 2020, 02:45:47 PM ---You got a Honda so EVERYTHING is metric

--- End quote ---

Surprisingly a lot of the early Japanese Car Engines used imperial sizes as OEM. Back in 1978/9 the firm I worked for had a pick up can't remember if it was a Toyota L2 or the Datsun equivalent. Anway the big ends went so we had to have the crank ground & re-shelled. All the bearings were standard BLMC sizes due to the fact that the manufacturers bought a load of old BLMC machinery and obsolete engine manufacturing rights. The crank turned out to be straight out of an old Austin A60 or similar except with a different crank taper. !

SeanFD:
The fuel hose is 5.5mm ID and 10.5mm OD.

The breather pipe is 12mm ID and, about, 15-16mm OD at the top and bottom.

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