heejrbmw
New member
I had my K75 gas tank sitting to the side while I gained access to the relays. I noted that the two hoses attached to the rear end of the gas tank were brittle and broken off. I traced one to the foot peg area on the right side and the other seemed to go near the right side then turned to the left side. I did not finish tracing where it went before it was too late to see if it was attached to anything. It appears that it was not attached to anything, because the hose end was dirty and did not have the appearance of having been attached to anything. It may have gone to the left footpeg area. I searched the forum and found the following:
"It is not uncommon to take the vent hose that runs from the tank to the crankcase and disconnect it from the crankcase end and then run it to the right side by the centerstand. The thinking is that any fuel slosh caused by overfilling or any fumes caused by expansion will not find their way into the crankcase thereby compromising the oil. Usually these fumes gas off after the oil has been hot for a period of time. If you do alot of short trips (to the corner store, a close by friends house, etc,) it is thought that instead of gassing off, it builds up.
The two tank hoses (vent and filler overflow can be T'ed together if they go to the area of the right footpe(not left, there is a big chrome hot thing there!) But don't allow the filler overflow to go to the crankcase. If you overfill it , it will put raw gas into your oil.
You said that the hoses "were disconnected from THE FUEL TANK". On later K75 there was a cup underneath the tank vents that would catch anything that came out of the vent tubes and then drain through a hose, but I gather yours does not have this. If you don't have the cup, a hose should be attatched to each of the two tubes and then routed to the right footpeg area."
Lee Fulton
I found a follow up from PGlaves as follows:
"The little plastic funnel that clips to the frame under the tank is called an "air accumulator" and the part # is: 16 13 2 307 467. It positions under the two stub pipes on the tank.
The vent hose running from the tank to the crankcase was disconnected because it was one of those stupid ideas that didn't work out. Fill the tank, and park in the Sun on a warm day, and you were almost guaranteed to dump raw fuel into the crankcase - thus diluting the oil and trashing the bearings. My dealer disconnected this hose and installed the air accumulator (funnel) on my K75 back in '86 at the 600 miles service, 3 days after I bought the bike."
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Paul Glaves - "Big Bend", Texas U.S.A
I believe that what I'm reading above indicates that I should replace the two brittle hoses and run both to the right footpeg area or replace with a single hose coupled with a tee. Can anyone confirm? If the line I did not trace all the way down was connected to anything, where should I look to see if I need to plug a line or crankcase?
Thanks for the help in advance!!
Ed
"It is not uncommon to take the vent hose that runs from the tank to the crankcase and disconnect it from the crankcase end and then run it to the right side by the centerstand. The thinking is that any fuel slosh caused by overfilling or any fumes caused by expansion will not find their way into the crankcase thereby compromising the oil. Usually these fumes gas off after the oil has been hot for a period of time. If you do alot of short trips (to the corner store, a close by friends house, etc,) it is thought that instead of gassing off, it builds up.
The two tank hoses (vent and filler overflow can be T'ed together if they go to the area of the right footpe(not left, there is a big chrome hot thing there!) But don't allow the filler overflow to go to the crankcase. If you overfill it , it will put raw gas into your oil.
You said that the hoses "were disconnected from THE FUEL TANK". On later K75 there was a cup underneath the tank vents that would catch anything that came out of the vent tubes and then drain through a hose, but I gather yours does not have this. If you don't have the cup, a hose should be attatched to each of the two tubes and then routed to the right footpeg area."
Lee Fulton
I found a follow up from PGlaves as follows:
"The little plastic funnel that clips to the frame under the tank is called an "air accumulator" and the part # is: 16 13 2 307 467. It positions under the two stub pipes on the tank.
The vent hose running from the tank to the crankcase was disconnected because it was one of those stupid ideas that didn't work out. Fill the tank, and park in the Sun on a warm day, and you were almost guaranteed to dump raw fuel into the crankcase - thus diluting the oil and trashing the bearings. My dealer disconnected this hose and installed the air accumulator (funnel) on my K75 back in '86 at the 600 miles service, 3 days after I bought the bike."
__________________
Paul Glaves - "Big Bend", Texas U.S.A
I believe that what I'm reading above indicates that I should replace the two brittle hoses and run both to the right footpeg area or replace with a single hose coupled with a tee. Can anyone confirm? If the line I did not trace all the way down was connected to anything, where should I look to see if I need to plug a line or crankcase?
Thanks for the help in advance!!
Ed