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Average Member
 
Group: Forum Members
Last Login: 2 days ago @ 8:12:50 AM
Posts: 803,
Visits: 292
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quote:
Originally posted by Head Hog
HEtkind,
Let's see, in an earlier post you referred to me as a "trol" and then in your previous post you referred to me as "Hoggly Head". Strange, but I don't ever remember using either of these monikers. But then I guess by the fact that I seem to be "low on logic", what else could it be other than your right
It's always amazes me that superior individuals with advanced degrees and maybe even riders of certain types of motorcycles are far better than the rest of us.
Have a nice day.
Head Hog
'79 FLH
'00 FLSTC
'01 Concours
Shhh, don't you know his rules don't apply to him?
Good grief, you're brandishing dangerous logic, man!
Boycott Sturgis!
deadman out
Minivans. Why is it ALWAYS the minivans?
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Starting Member
Group: Forum Members
Last Login: 7/29/2008 10:24:44 PM
Posts: 1,
Visits: 1
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I have stumbled upon an easy and cheap fix to the surging BMW problem - add a little oil to the fuel. I have a 1998 R1100RT with 50K miles that surged pretty noticeably, particularly in 2nd, 3rd, or 4th gears around 4K rpm. A few weeks ago I accidentally set the bike on its side (thought the sidestand was all the way forward but it wasn’t) and the tip over resulted in a little oil getting into the cylinder. Turns out laying a boxer engine over often does this. When I cranked it a large cloud of white smoke billowed out of the tailpipe but the bike ran fine otherwise. During the 10 mile ride to blow out all the oil I noticed the surge was initially gone but then returned once the oil was all out. So, being curious by nature, I asked my local dealer (BMW Ducati in Col Springs) how bad I would screw up my BMW if I added oil to the fuel on purpose. Being assured I wouldn’t cause any damage, especially if I used small amounts, I began to test my theory. I am an aerospace engineer by trade specializing in stability and control of aircraft and it made sense to me that the surge was caused by an instability in the equations used by the computer to manage air, fuel, and other variables. If you could alter one of the variable slightly you might be able to remove the problem in the equations. So, I ran my tank almost dry then started experimenting with small amounts of oil (Penzoil 10W40 with Slick 50 additive) in just one gallon of gas (Shell 91 octane). I was confident that if I began experiencing problems I could just fill up with pure gas and dilute the problem away. After several hundred miles of testing I have arrived at the minimal ratio of fuel to oil that completely removes my surge – 45 oz of fuel to 1 oz oil. With this there is no surge, no smoke at all out of the tailpipe, and I’m pretty sure it even idles more smoothly. I bet if your bike surges more you could add slightly more oil and eliminate your surge. Good luck. It sure is nice riding a BMW that is as smooth as glass.
Ryan BMW CO
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