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1Back to top Go down    Fuel tank pipes '92 K75 on Wed Aug 01, 2018 5:38 am

edmundf

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Hi all,

I am just confirming i have the layout of the fuel pipes correct - underneath the tank, back right as you are sitting on the bike, there are two small pipes, breather and overflow which line up with the funnel clipped into the frame. On the LHS the front left pipe from the tank goes to the pressure regulator behind the throttle body and then the return line from the fuel injection rail goes back to the pipe on the back left of the tank.

Does this sound right?

I got the bike without any fuel lines so have no reference and any of the photos or schematics i have been looking at are unclear.




Ed

    

2Back to top Go down    Re: Fuel tank pipes '92 K75 on Wed Aug 01, 2018 5:55 am

charlie99

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almost correct terminology

the front tank left hand side is the return ….from the fuel pressure regulator

the rear left hand side front  is the high pressure -feed line to the fuel rail …)on 8 valve k bikes )  ie the front of the fuel rail

the rear of the fuel rail  dives around the back to the fpr …

then returns to the tank ...as above

does that help ?


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

3Back to top Go down    Re: Fuel tank pipes '92 K75 on Wed Aug 01, 2018 6:12 am

edmundf

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Thanks for the response - i am pretty new to K bikes so yep i am making up a lot of this as i go along..

I got a bit lost at 'the rear left hand side front' 


I am asking the question a bit badly i suppose - underneath the tank there are two pipes on the left hand side, where the rubber fuel lines attach. These i understand connect to the front of the fuel injector rail and to the top of the fpr, which goes to which? Smile


best photo i have found showing it is from here https://silodrome.com/bmw-k75/ - i cannot post photos here yet so 14th photo down, when that power unlocks i can upload some.

Ed

    

4Back to top Go down    Re: Fuel tank pipes '92 K75 on Wed Aug 01, 2018 6:22 am

charlie99

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fpr goes to the front tank spigot

rear tank spigot goes to the fuel rail ...front

clear ?


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cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%O
    

5Back to top Go down    Re: Fuel tank pipes '92 K75 on Wed Aug 01, 2018 6:37 am

edmundf

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Perfect thanks Smile - hopefully soon i will be able to post photos which will make this a whole lot easier

    

6Back to top Go down    Re: Fuel tank pipes '92 K75 on Wed Aug 01, 2018 11:00 am

Laitch

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Here's a diagram from an online BMW K75/K100 workshop manual.  The pipes are much closer together than drawn here for clarity of their relationship to the system. You should download this manual from the Forum Tech here. It's in the Manuals section. Click the Portal tab to access it. There's a lot of help in the Forum Tech.


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1995 K75T 68,000 miles
    

7Back to top Go down    Re: Fuel tank pipes '92 K75 on Thu Aug 02, 2018 5:09 am

edmundf

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@Latich - Cheers, it was that diagram that got me to the question - i just wanted to confirm. The forum has some excellent resources which i am working my way through

    

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