Howdy folks! I need your help...
I have two bricks - a 95 low seat model and a 95RT. I bought the latter because the ergos of the former kill my fat old man knees! Anyhow, I have been chasing a possible fueling issue on the RT for three months and I am utterly stumped.
I purchased the bike in Oklahoma from the 3rd owner with 45k on the clock. The bike was running rough-ish when I picked her up, though I attributed that to the fact that the air cleaner had been replaced with an EXTREMELY oily and filthy K&N.
When I got her home, I ordered both the standard and supplemental service kits from Bob's BMW and got stuck in. All in all, nothing concerning emerged from the service aside from the too-tight exhaust valves (not catastrophically so), which I also took care of. Following the service, I warmed her up, balanced the throttle bodies, and set the idle.
Right away she ran ROUGH at idle and would bog down and stumble under any acceleration. Again, I got stuck in. I:
- confirmed good flow from the fuel pump and new fuel filter
- replaced all of the rubbers around the airbox and throttle body
- cleaned the throttle body
- replaced the injectors (the old ones were quite bad) and fuel lines
- replaced the vacuum lines and vacuum caps
- cleaned up the inside of the airbox and ensured the barn door on the air sensor moved freely
- replaced the spark plug wires
After reassembly she ran much better… above 4k rpm. Currently, she starts fine most of the time with the throttle advance on, and she idles fine once she is warm, though the idle is inconsistent when cold. Also, I can’t get the TBs perfectly balanced at either idle or 4k. They are close, but not perfect.
Also... between 2 + 3500 rpm she will either stumble if we are on the road until we hit 3500 and then run fine OR plateau and then fall back to 2k if she is on the center stand. Also, the idle will increase if I tilt the bike to the left (not the right) with the bars straight! I have never seen anything like on my previous beemers or Japanese bikes.
In addition to the new service parts, the bike is mostly stock. The only real modification is one of the Eu police tanks, which was installed by the original owner.
That is where we are as of today. I have combed the forums (including yours!!!) and have done darn near everything aside from adjusting the air sensor, which most folks say not to do.
I will graciously accept any and all thoughts y’all might have. Thank you!