Honda-SOHC

SOHC.co.uk Forums => CB350/400 => Topic started by: royhall on September 26, 2015, 02:19:48 PM

Title: Where do these pipes go
Post by: royhall on September 26, 2015, 02:19:48 PM

Could somebody give me a pointer as to where the three pipes go in the picture.

[attachimg=1]

I assume the single larger pipe is the fuel feed in which case why has the fuel tap got 2 outlets. What are the two small pipes doing, breathers perhaps?
Cheers.

Title: Re: Where do these pipes go
Post by: Bullit on September 26, 2015, 02:48:43 PM

Are they attached to the bottom of the carbs? If so they are the overflows and need to point downwards

Title: Re: Where do these pipes go
Post by: Trigger on September 26, 2015, 03:20:26 PM

The large pipe is your fuel and there should be two small pipes that are vent tubes, that just vent ;)

Title: Re: Where do these pipes go
Post by: Chris400F on September 26, 2015, 03:23:52 PM

Both the tap on my bike and on a spare tank I have only have a single outlet, not sure why yours has two.

Smaller pipes appear to be breathers and are routed over the airbox and down behind the engine, exiting where the overflow/drain tubes go.

I sold a set of carbs on eBay recently, don't know if this picture helps.
[attachimg=1]

Title: Re: Where do these pipes go
Post by: royhall on September 26, 2015, 03:30:41 PM

Thanks guys.So the vents go over the right of the air filter box and down below swing arm height with the 4 bowl drains? Looks like I will have to blank off one of the feeds from the tap. Didn't get chance to see this as it was all apart when I got the bike. Thanks.

Just had a good look at the fuel tap and it is one of these http://www.ebay.com/itm/K-L-Fuel-Valve-Petcock-16950-300-020-Honda-CB500K-CB550K-CB750K-18-4129-/191693311006?fits=Model%3ACB350F&hash=item2ca1cfcc1e&vxp=mtr (http://www.ebay.com/itm/K-L-Fuel-Valve-Petcock-16950-300-020-Honda-CB500K-CB550K-CB750K-18-4129-/191693311006?fits=Model%3ACB350F&hash=item2ca1cfcc1e&vxp=mtr)  . As its nearly new I will keep it. It says on the site to get a splitter to join them together, so I shall do that (or just blank one).

Title: Re: Where do these pipes go
Post by: Trigger on September 27, 2015, 09:31:44 AM

looks like you may have a 400 set of carbs and a 350 fuel tap.

Title: Re: Where do these pipes go
Post by: royhall on September 27, 2015, 09:54:33 AM

Is there a difference Trig, I thought it was just the jetting. The original picture is a spare set of 350F and they are identical. Am 99% sure there the same but there's always that 1% of doubt.

Title: Re: Where do these pipes go
Post by: Trigger on September 27, 2015, 10:46:51 AM

Quote from: royhall on September 27, 2015, 09:54:33 AM

Is there a difference Trig, I thought it was just the jetting. The original picture is a spare set of 350F and they are identical. Am 99% sure there the same but there's always that 1% of doubt.

What is the Carb number ?

just had a good look and you are right, you have a fuel tap off a CB500/CB750K. So its just the wrong tap for a CB350 ;)

Title: Re: Where do these pipes go
Post by: royhall on September 27, 2015, 11:05:24 AM

Yes it's definitely a 500 tap, but its nearly new and fits okay so I will order a splitter for it. Cheers.

Title: Re: Where do these pipes go
Post by: Tiny Tim on September 27, 2015, 12:44:13 PM

350 fuel taps are hard to come by.
I did find a new one in Italy and yes it was pricey.
The tap on my 400 has one outlet, would that fit?

Title: Re: Where do these pipes go
Post by: royhall on September 27, 2015, 01:43:31 PM

No, the 400/4 is a screw fitting tap. This ones nearly new so it's fine with a 2 into 1 splitter.

Title: Re: Where do these pipes go
Post by: Tiny Tim on September 27, 2015, 02:01:41 PM

Ah, didn't look at that bit.