BMW K bikes (Bricks)

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1Back to top Go down    Fuel line burst on Tue Jun 27, 2017 2:57 pm

timo27

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Hi all, Ive just started her up and a fuel line has just gone pop / bang - its the one whilst looking at the bike side on to the left which leaves the fuel rail - or does it enter the fuel rail?? i thought this hose went back to the tank? so before i strip her down is there anything i should be aware of?? 1984 k100. thanks Tim

    

2Back to top Go down    Re: Fuel line burst on Tue Jun 27, 2017 3:02 pm

duck

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It goes to the fuel pressure regulator - and then back to the tank.

How to get to the FPR:
http://www.kbikeparts.com/classickbikes.com/ckb.tech/0.ckb.tech.files/maf/maf.htm

Once you get the MAF out you will have access to the FPR.

You'll probably want a couple of BMW 13mm hose clamps to replace the Oetiker clamps that hold the fuel lines to the FPR.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

3Back to top Go down    Re: Fuel line burst on Tue Jun 27, 2017 3:08 pm

timo27

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Thanks Duck, do you think after sitting for seven years this hose was just past it? i guess this is the case. Thanks Tim

    

4Back to top Go down    Re: Fuel line burst on Tue Jun 27, 2017 3:16 pm

duck

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That would be my guess.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

5Back to top Go down    Re: Fuel line burst on Tue Jun 27, 2017 3:19 pm

timo27

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6Back to top Go down    Re: Fuel line burst on Tue Jun 27, 2017 7:13 pm

Dai

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Probably teaching me granny to suck eggs, but change all the fuel lines while you're in there. Be aware that the one on the rear spigot of the fuel tank is 7mm ID (thanks BMW) but an 8mm ID line will go on and not give trouble if you clamp it up properly with a worm drive.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

7Back to top Go down    Re: Fuel line burst on Wed Jun 28, 2017 5:03 am

92KK 84WW Olaf

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We just put a new one on Magda's K100 last weekend.

I had some BMW line in my shed, 8mm inside diameter, 13mm outside diameter. If you are getting a non BMW one make sure its rated for fuel injection and you need at least 60psi because that's what's coming from the pump to the fuel pressure regulator.

I agree with Dai but for one small part. I also got the 13mm clips, but they are too small and fiddly to get them on and took them off and went one size up. You need 6 clips.

When you put the new lines in make them longer than the original ones by about 1 1/2" or so and you will be able to slide the tank back without disconnecting it to access the radiator coolant filler and you will also be able to lift it enough to access the relay box without disconnecting it. The pipe at the very front just behind the radiator should have an insulation around it.

I managed to do mine by just removing the bottom half of the air box. But there are 2 allen bolts inside bolting the bottom down to the top of the engine......WD40 them to get them out and liberal copper grease when you are putting them back.

While you are in there it's easier to get at the crankcase breather pipe and its small money so if in doubt swap it.



Last edited by 92KK 84WW Olaf on Wed Jun 28, 2017 1:52 pm; edited 1 time in total


__________________________________________________
1992 K100LT 0193214 Alaska Blue 101,000 miles
1984 K100RT 0022575 Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Mystic Red 58,645 now 80,700 miles
    

8Back to top Go down    Re: Fuel line burst on Wed Jun 28, 2017 1:01 pm

timo27

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Again many thanks chaps - this is defo the most helpful forum like

    

9Back to top Go down    Re: Fuel line burst on Wed Jun 28, 2017 1:16 pm

duck

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I use 5/16 (7.9mm) ID FI fuel lines on my bikes and the 13mm BMW hose clamps fit fine on that.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
http://www.ClassicKBikes.com
    

10Back to top Go down    Re: Fuel line burst on Wed Jun 28, 2017 3:39 pm

timo27

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Well that air box is a joke. :hp:But all done apart from ordering a new air filter, I might as well have ordered every spare part going haha

    

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