Originally Posted by harrowbmw
I was shocked when I viewed your video clip of your LT Chris, especially the severity of those bars shaking. I find it hard to believe BMW could have allowed this to occur considering all the know succesful combinations of motorcycle frame geometry.
How this could have slipped through BMW's R & D department and testing defies logic. Is this a bad side effect of the change in rake, trail or steering head angle of the later LT's? If this is an improvement by BMW they should all be hanging their heads in shame. I'll be staying with my '99 for a while longer then.
Any further comment?
Hey, Paul - I prolly shouldn't type this without backup (cleaned out my office coupla weeks ago and now can't find squat!!) - butt I had kept a list that included just about every
*brand* of motorcycle where a front end shake wuz mentioned in an article or in a post. Not only true 'tank slappers', butt just wobbles/shakes/bar oscillations/etc. Lots of suggestions and blame, as to why this phenomenon occurs. One thang I did notice in a lot of the articles wuz the combined mention of *hands off the grips while de
-celerating down thru the 50-45-40 mph range. Hondas, Suzukis, Yamahas, BMWs, and on and on --- and of course, as you might expect, a lot of the blame wuz placed on the particular manufacturer of the brand specified in the article.
I'm of the opinion that the manufacturer is not the ultimate culprit in these instances, butt rather, it's the combination of several factors that are the causation of the event --- road surface, tire inflation, tire condition, bike load and weight distribution, condition of the shocks, condition of the steering damper, and the obvious result of the fork angle/front end rake of two wheeled vehicles --- coupled with the removal of the handlebar stabilization items (one's hands!!).
Just my opinion, understand. And I wish there wuz a definitive 'white paper' available on the subject, so that the phenomenon had an understandable cause for occurring.
BTW - ole Toad experienced this 'feature' several years ago when I needed to tighten the gauntlet of one glove and didn't have the cruise control set and we de-celerated through the range - scary wobble. We've never experienced it since, until just recently when I, on purpose, tried to induce it again. Yup, front tire has extremely worn center tread (won't pass state inspection) and hands off the bars at 47 mph on a fairly irregular road surface. Pucker factor up,
even tho I figgered it might happen!! New tire is on order!!