1 Fuel vapor smell is stronger than usual from vent hoses down by the swing arm. Mon Jun 20, 2011 2:23 pm
1987k100rt
active member
Hello all. Maybe someone out there can help with this anomally.
1987 K100 RT 46k miles.
after a few month hiatus off the road due to a broken clutch cable I took the bike's fairing all off and replaced clutch, throttle, and choke cables. Upon puting the tank back on I found out the tank was leaking underneath from a original rubber "O" ring that had dried up and shrank from no fuel in the tank for months. I Replaced that "O" ring in the sender unit and made sure it was tightend down well by the fuel gauge sender piece. Also replaced the fuel pump vent hose with a new one from a BMW store. Re-installed the tank and added quick dis-connects for the two fuel lines. Re-attached the vent hoses to the underside of the tank. Added 1/4 tank worth of gas. I let that sit for a while and checked for leaks. I only smelled the vapor coming from the vent lines down by the swing arm/ rear brake master cylnder. Thinking that it was due to a near empty tank I decided to fill the tank near full so it would have even less air or vapor in it. I had the same results. After a day of sitting in the garage it has left a strong fuel odor. I have had the bike for over 2 years and it had never created so much fuel smell before. I had pulled some slack on the external vent lines while re-attaching to the underside of the tank maybe it was kinked and now is not. Anyone have any ideas why this could be. Iinstalled the new fuel pump vent hose in the tank exactly like the old one was. I appreciate any advice or help. Also, I saw mention in an older post about the clutch cable nipple holder which has a tendency to slip downward in the lever hole. Mine is doing the same and I am trying to find out how to prevent it. I replaced the clutch cable nipple holder with a new one (the old cable broke in this same area). I have adjusted the cable as directed in this forum and it still slips downward creating an uneven rotation while pulling in the lever. I would like to prevent another broken cable if possible. There was a mention of a fix with a screw to the botom of the lever. Are there any diagrams or directions to do this? Thank you all for your help. James.
1987 K100 RT 46k miles.
after a few month hiatus off the road due to a broken clutch cable I took the bike's fairing all off and replaced clutch, throttle, and choke cables. Upon puting the tank back on I found out the tank was leaking underneath from a original rubber "O" ring that had dried up and shrank from no fuel in the tank for months. I Replaced that "O" ring in the sender unit and made sure it was tightend down well by the fuel gauge sender piece. Also replaced the fuel pump vent hose with a new one from a BMW store. Re-installed the tank and added quick dis-connects for the two fuel lines. Re-attached the vent hoses to the underside of the tank. Added 1/4 tank worth of gas. I let that sit for a while and checked for leaks. I only smelled the vapor coming from the vent lines down by the swing arm/ rear brake master cylnder. Thinking that it was due to a near empty tank I decided to fill the tank near full so it would have even less air or vapor in it. I had the same results. After a day of sitting in the garage it has left a strong fuel odor. I have had the bike for over 2 years and it had never created so much fuel smell before. I had pulled some slack on the external vent lines while re-attaching to the underside of the tank maybe it was kinked and now is not. Anyone have any ideas why this could be. Iinstalled the new fuel pump vent hose in the tank exactly like the old one was. I appreciate any advice or help. Also, I saw mention in an older post about the clutch cable nipple holder which has a tendency to slip downward in the lever hole. Mine is doing the same and I am trying to find out how to prevent it. I replaced the clutch cable nipple holder with a new one (the old cable broke in this same area). I have adjusted the cable as directed in this forum and it still slips downward creating an uneven rotation while pulling in the lever. I would like to prevent another broken cable if possible. There was a mention of a fix with a screw to the botom of the lever. Are there any diagrams or directions to do this? Thank you all for your help. James.