SOHC.co.uk Forums > CB350/400

Fuel pipe quickie

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Laverdaroo:
Evenin all,

I didn't have one on mine when it came to me in a sorry state so dont know the actual dims but can anyone confirm the ID of the fuel line for the 400/4/ I have 4.5mm in my head but cant remember where from.

fanks

McCabe-Thiele (Ted):
I am pretty sure it's originally 1/4" - I used 5 mm i/d others here will confirm.
I just tried to measure mine but it's not easy as the E10 proof tube open as you get the caliper it's about 2 mm wall black rubber type appearance.

NJ stated it was 5.5 mm when I asked last year so that's going to be the original size - I found some on e-bay advertised  for a scooter. it's 5 mm but not reinforced so it pushes on easily enough - does not need a clip but used one anyway.

I used an inline filter - these -https://www.ebay.co.uk/itm/132906255205 there is a taper on these so the fuel line fitted a treat sitting above the carbs with the side entry towards the fuel tap.

Laverdaroo:
Thanks Ted, I have some of the 4.5mm but it looks tiny going from the tap to the carbs, hence the question. I have some 5.5 lurking somewhere, I'll get a bit of  that on it I reckon. Cheers for the heads up buddy.

Bryanj:
5.5 id is thecorrect stuff,  Julie did put me on to a supplier but cant remember who

allankelly1:
Hi Ted

Watch out for these cheap Chinese filters

They are generally not good with normal super unleaded and from experience definitely not ethanol proof

Due to the fuel tap filter not being in good condition I had some and the first one was attacked and the glue joint failed and for the second one fitted, fuel started over a period of time to dissolve the internals and made the fuel sitting in the filter turn yellow, and I think the dissolved plastic can then wind up in the carbs jets and re hardened when the fuel is not present

In the end fitted one of these all metal types that obviously are petrol proof for all grades of fuel



https://www.ebay.co.uk/itm/Aeroline-Alloy-Fuel-Petrol-Diesel-Inline-Filter-1-4-6mm-For-MOTORCYCLE-SCOOTER-/173734676326?mkcid=16&mkevt=1&_trksid=p2349624.m2548.l6249&mkrid=710-127635-2958-0


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