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Thread: 1994 K75S Z Hose Question

  1. #16
    Registered User argent brick's Avatar
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    Hi Jim, Did you ever manage to sell your K12?
    Lynn
    MOA #57883
    Current Ride: 1995 K75 Standard
    Past: 1978 Yamaha XS 750, 1976 BMW R60/6

  2. #17
    Registered User 58058D's Avatar
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    Not yet officially on the market. Now looking at selling the K13S and getting a track bike. My wife is thinking maybe it would be good to sell all the bikes!?!?? We are about to list the Inn for sale as we begin work with our architects for our home in San Miguel de Allende, MEX. So, all this will take a while, but right now, theoretically both the K12RS and the K1300S are for sale, I will probably list them both in the next week on Craig's list, etc. I do have a line on a couple of good track bikes to cover me, but having to 'drive' to Sacramento weekly in a car when I could ride these wonderful roads is pretty tough to consider.....
    Jim Douglas '00 K1200RS >138,000 miles -- Black, 01/10/2000 to present
    Gone: White '09 K1300S sold @ 22k mi, Black '93 K1100RS traded @ 78k mi, Red '85 K100RS sold @ 44k mi, '06 Kaw 650R chrome yellow track bike sold http://www.seagullbb.com/

  3. #18
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    As a temporary fix to get you home, could you remove the hose and plug the opening on the plenum?
    Ron

    91 K75RT ABS

  4. #19
    3 Red Bricks
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    Quote Originally Posted by roncooper View Post
    As a temporary fix to get you home, could you remove the hose and plug the opening on the plenum?
    Yes, but you would get oil coming out of the crankcase end. Probably best to leave it in place and change it as soon as you get home. You'd open up more cracks taking it off. Small cracks for a couple hundred miles are better than big cracks for less. But change it ASAP.

    LONG MAY YOUR BRICK FLY!

    Ride Safe, Ride Far, Ride Often

    Lee Fulton Forum Moderator
    3 Marakesh Red K75Ss
    Mine, Hers, Spare

  5. #20
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    z hose replacement

    is it possible to replace this hose without removing the gas tank and then the air filter. On my 94 k75 (naked version) it looks like the hose is jammed right underneath the air filter with no room to lift it off.

    I am a proud new owner of this k75 so have a lot to learn!

    Rob

  6. #21
    Registered User mlytle's Avatar
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    not easily. best to take that stuff off to do it. as a new owner, this is great opportunity to get in there and check other things like the air filter, FPR vacuum hose, fuel hoses, air intake elbow, etc. if they are original, they all need to be replaced.

    taking tank off is easy.
    Marshall
    92 K75s, 94 K75s, 96 K1100RS (caretaker), 09 K1300s

  7. #22
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    Quote Originally Posted by rjayson View Post
    is it possible to replace this hose without removing the gas tank and then the air filter. On my 94 k75 (naked version) it looks like the hose is jammed right underneath the air filter with no room to lift it off.

    I am a proud new owner of this k75 so have a lot to learn!

    Rob
    Rob, i had the same question on my 93 nakid as well. As long as you can get to the clamp screws, as in facing to the left side, yes, very easy it turns out. I removed the plastic cover on the coils and had plenty of room. The hose is very pliable and slips over the crankcase stub easily. About ten minutes work. Cheers.

  8. #23
    3 Red Bricks
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    Chunk is correct (even if he does live in the wrong end of the state).

    The lower hose clamp needs to be FULLY loosened to the max to get it off and needs to be over the hose when you slip it back on.

    Quick easy job.





    LONG MAY YOUR BRICK FLY!

    Ride Safe, Ride Far, Ride Often

    Lee Fulton Forum Moderator
    3 Marakesh Red K75Ss
    Mine, Hers, Spare

  9. #24
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    Seems to me that in years past the Z Hose was a good bit higher priced. As much as 50% or more. Thats just from memory and probably not even correct. $15 + is certainly tolerable. (Though seems to me also that K75 oil filters went way up once to see what the market would bare. That drove me off.)
    Ridiculously priced parts make me put off replacement until I can pay for them without Credit.

    Which brings me to my point. I also have considered replacement Hose alternatives. Memory again tells me that on my K75s the two connection points for that Zhose are two different O.D.s. Sound right ?

    Would love to hear alternative methods if someone has done alternate hose piping on one or more bikes.

    Charlie

  10. #25
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    Z Hose : First Sign of Going BAD

    The Z hose will someday get its first crack. Temperature of the air and motor etc will allow the crack to open ever so slightly but only for short periods at any time during the ride, then more heat or less heat will help the hose get more rubbery or more stiff and seal itself for a while or a day or a few days then . . . You will notice that it doesn't go right, you might think it is bad gas or a hundred other things. Once you get a big crack or several you'll figure it out more easily.

    One time in WY or so it would not go up a long stretch (several miles) under high power (85mph loaded for camping) in warm weather, the motor seamed weak. A call to a great Dealer's svc people said, " sounds like a leaky Z hose." It would fix itself when you turned off the bike and it cooled some. Some rubbery tape wrapping at a hardware store made the Z hose work right for a thousand miles, the dealer in Kansas City had a new Z hose I bought.


    85 K100RS w 198,000 near Philly

    Happy New Year 2019 and hope this helps some of you.

  11. #26
    Registered User drneo66's Avatar
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    I don't think I've ever ran across this, but why aren't we using two 90 degree elbows, decent hose and another couple of clamps between these two fittings? This pipe isn't under a lot of pressure and it seems the rise/run would allow for an okay slope?

    Just thining
    Current: 2007 BMW R1200RT, 2013 F800GS
    Former: 1995 BMW K75S, 2009 BMW G650GS
    MOA Member #:150400, IBA#: 37558

  12. #27
    3 Red Bricks
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    Try it and let us know how it goes.



    LONG MAY YOUR BRICK FLY!

    Ride Safe, Ride Far, Ride Often

    Lee Fulton Forum Moderator
    3 Marakesh Red K75Ss
    Mine, Hers, Spare

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