Ian Posted June 16, 2010 Share Posted June 16, 2010 Today when setting valve clearance using 5th gear wheel rotation I measured 2" of backlash at the rim of my 2000 R1100RT. Ridden by me only 27K from new. I have read different posts about the amount of free play owners have with this model. Is there any BMW data on this? Can it, and should it, be corrected? regards, Ian Link to comment
ShovelStrokeEd Posted June 16, 2010 Share Posted June 16, 2010 .That's probably not a whole bunch out of spec, if at all. Think for a moment. It is not just transmission backlash. Crown wheel to pinion, pinion to driveshaft (both ends), 3 shafts and gear sets in transmission, input shaft to clutch hub. It all adds up and gets multiplied by the radius of the wheel. Link to comment
Haynes Posted June 17, 2010 Share Posted June 17, 2010 My R1150RT and R1150GS both have somewhere near that. Link to comment
Ian Posted June 17, 2010 Author Share Posted June 17, 2010 I'm feeling better now My thanks to you both, Ian Link to comment
4wheeldog Posted June 17, 2010 Share Posted June 17, 2010 Are you sure you are measuring inches, or could it be centimeters? (Sorry....Just jerking your chain.....I could not resist). Link to comment
BMUU Posted June 17, 2010 Share Posted June 17, 2010 Your post made me curious how much backlash my 1100RT had. I just went out and measured it and you'll be happy to know it's virtually identical to yours. Now we can both sleep better. Link to comment
philbytx Posted June 17, 2010 Share Posted June 17, 2010 Ian, Don't mean to worry you and the others unduly but I measured mine and it was 1.83977 inches !!! ;) Link to comment
Clive Liddell Posted June 17, 2010 Share Posted June 17, 2010 The gear you are in affects the measure :>) Link to comment
philbytx Posted June 17, 2010 Share Posted June 17, 2010 I was in First Gear Meshtex Clive... My summer riding gear Link to comment
Ian Posted June 18, 2010 Author Share Posted June 18, 2010 Are you sure you are measuring inches, or could it be centimeters? (Sorry....Just jerking your chain.....I could not resist). Chain successfully jerked though .... I actually used my thumb width twice for two inches as it was easier than using my pinkie 5.08 times Ian Link to comment
Gothicman Posted July 4, 2015 Share Posted July 4, 2015 I read with interest that other R1100rt owners are experiencing the same backlash as I am, however how much backlash would we assume to be acceptable, I fear that mine is closer to 3”, and when I take up drive I can hear it clunk, Should I worry? I was totally convinced that it had to be the drive shaft uj joint so obtained a replacement via ebay, upon striping down to access the drive shaft, it appeared to have no slap what so ever and that the backlash could be felt further forward from the output shaft through the gearbox, but I can not imagine how we get backlash through the gearbox, The bike has been like this since I bought it 3000 miles ago, but it is disturbing me, does anyone have any thoughts on this, or am I to presume that this is normal and acceptable in view of the number of areas where backlash can show its self within the drive train David Link to comment
dirtrider Posted July 4, 2015 Share Posted July 4, 2015 Afternoon David You resurrected a thread from 2010 here. You really should start your own thread on YOUR problem. In any case-- 2"-3" of backlash at the rear tire is no big deal on an oilhead. BUT it DEPENDS on how much lash is where-- If ALL the backlash is in the drive shaft then you have big problems. On the other hand, if, you have a little lash in the clutch splines, a little lash in the trans shaft gears, a little lash in the input shaft dampener, & a little lash in the drive shaft splines, & a little lash in the rear final drive gears -- that could easily add up to a normal 2"-3" of lash. Link to comment
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