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Topic:
Fuel line question - 75 CB400F
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Topic: Fuel line question - 75 CB400F (Read 229 times)
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krksquared
Enthusiast
Posts: 123
Fuel line question - 75 CB400F
«
on:
November 03, 2024, 11:11:45 AM »
Looks like a T fitting between the two center carbs is loose as can be seen by the linked video. Shouldn't be this way - right? I've never been this deep into the bike. O rings on the T? Looks like a bit of a struggle to get in there. Carbs need to come off? I don't like the idea of gas leaking in that area (or any other area)! Also, is 4.8mm fuel line hard to come by?
https://www.nostalgickitscentral.com/mustang/fuel%20line.mov
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@kennectwithme
1975 CB400F
1971 SL350
1979 CBX
2007 Buell XB9R
2003 Harley V-Rod VRSCA
If it ain't broke, I'm riding...
CycleRanger
No comment about being an
Really Old Timer ...
Posts: 5,433
Central Texas Shop Manual Advocate
Re: Fuel line question - 75 CB400F
«
Reply #1 on:
November 03, 2024, 11:50:58 AM »
Yep, the carb rack has to come out
and
apart to change those o-rings.
The good news is Honda still sells the "packing set" (O-rings, gaskets) for those carbs.
PN 16010-333-315
They also sell the proper fuel line.
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Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5 '79 XL250s CL350K3
CB750K3 '76 XS650 '76 CJ360T
krksquared
Enthusiast
Posts: 123
Re: Fuel line question - 75 CB400F
«
Reply #2 on:
November 03, 2024, 01:20:18 PM »
Thanks for the info! The things you discover when fixing something else
Better now than later!
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@kennectwithme
1975 CB400F
1971 SL350
1979 CBX
2007 Buell XB9R
2003 Harley V-Rod VRSCA
If it ain't broke, I'm riding...
BenelliSEI
Really Old Timer ...
Posts: 9,932
1969 cb750
Re: Fuel line question - 75 CB400F
«
Reply #3 on:
November 03, 2024, 02:30:30 PM »
If you don’t change the “0” rings on the tees, be patient. They may drip for a while, swell up and seat. Usually when that happens in the Spring, I make a note to replace them, next Winter!
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carnivorous chicken
Master
Posts: 1,852
Re: Fuel line question - 75 CB400F
«
Reply #4 on:
November 03, 2024, 02:37:06 PM »
Also, these carbs are like other SOHC carbs where that T can wiggle a little, so the fact that it is moving isn't necessarily something bad. Better to see if it is actually leaking.
«
Last Edit: November 03, 2024, 02:50:03 PM by carnivorous chicken
»
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bryanj
Really Old Timer ...
Posts: 14,025
CB500 Number 1000036
Re: Fuel line question - 75 CB400F
«
Reply #5 on:
November 03, 2024, 03:07:38 PM »
Be very carefull with the tee, a lot are plastic and you cant buy it seperately
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Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).
Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!
Don R
My Sandcast is a
Really Old Timer ...
Posts: 19,917
Saver of unloved motorcycles.
Re: Fuel line question - 75 CB400F
«
Reply #6 on:
November 03, 2024, 03:09:11 PM »
I changed the tee on a KZ1000 and did remove the rack but only took two carbs loose enough to slip the tee out.
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No matter how many times you paint over a shadow, it's still there.
CEO at the no kill motorcycle shop.
You don't need a weatherman to know which way the wind blows.
krksquared
Enthusiast
Posts: 123
Re: Fuel line question - 75 CB400F
«
Reply #7 on:
November 03, 2024, 03:19:54 PM »
Hey you talked me into checking for leakage. I'd never noticed any leaking before but it's hard to see in there with the tank on and I always close the tank valve when parked. If I can get out of pulling the carbs, I'm all for that. And if I consume it faster than it leaks - no big deal haha. The only thing worse would be my CBX! Hmm maybe it's time to check that one too...
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@kennectwithme
1975 CB400F
1971 SL350
1979 CBX
2007 Buell XB9R
2003 Harley V-Rod VRSCA
If it ain't broke, I'm riding...
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Fuel line question - 75 CB400F