SOHC.co.uk Forums > CB750

Fuel restriction.

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Johnny4428:
This cracks me up! Could never understand why the outlet on some of these taps weren’t positioned away from obstructions like out the back of the tap horizontally. Had a nice run out a few days ago on returning the engine started making a horrible noise and instead of stopping I limped along to get nearer home until eventually it cut out completely. I did think it was catastrophic. After having a good look around couldn’t see any oil or fluid leaks anywhere. Pushed the button to start and away it went so hopped on and drove home. This is what I discovered when I got back to base.
Sorry if pic 90 out. Click and it’s fine!

Bryn:
Having just changed the plugs, added an in-line fuel filter and put the tank back on 10 minutes ago I notice my tap outlet goes out the back of the tap horizontally (550K3)

K2-K6:
Some of the earlier taps look like they weren't bespoke, more off the shelf type arrangement tgat didn't take account of other items close by, not a huge amount of room around there anyway.

Original fuel pipes had quite thick wall, making them resistant to kicking like this too.

Wouldn't hurt to use length change in looping lower and back up again to ease pathway either.

K type 750 would usually run for about 3 miles with fuel off just on float bowls as I often turned mine off on way home to habitually leave the carbs more or less empty when not in use.

Pauarc:
I think the fuel pipe should go through the carb housing

Laverda Dave:

--- Quote from: Pauarc on July 20, 2024, 06:31:44 PM ---I think the fuel pipe should go through the carb housing

--- End quote ---

That's a great idea, I wish the 400 had that arrangement as the fuel pipe sits on top of the carbs. I know it is double skinned and has the spring heat shield arrangement but it looks ugly.

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