jge@unc.UUCP (06/23/84)
Does anybody out there have any experience with the BMW R65 vibration problem, starts at about 4500rpm ? Does anybodyknow if BMW has plans to provide a retrofit fix anytime in the near future ?
darryl@ism780.UUCP (06/25/84)
#R:unc:-737600:ism780:15800018:000:1706
ism780!darryl Jun 24 09:14:00 1984
There have been several discussions of the vibration in "BMW News", the
magazine of the BMW Motorcycle Owners Association. The suggested fix
is to put rubber spacers on the engine moutine bolts. The June 1984
issue has this to say:
Rubberized Spacers sometimes used as engine vibration dampeners on the
R65 are available from Jesse Fowler (Mid-Michigan Cycle)at $20 per
set. The term engine vibration dampeners is really a misnomer, since
you are really dealing with frame harmonics here rather than engine
imbalance; you cannot cure the problem with engine balancing techniques.
These spacers consist of a hard rubber buffer sandwiched between and
firmly fastened to two steel washers. They replace the 8mm metal spacers
on the front engine mount on the R65; one of them is notched to clear
the oil filter cover.
I happen to have an R65, and it certainly does vibrate. All the same, it
is a relatively small range (about 4250-4750 on my bike), and I find that,
when I do use the engine in this range, I am merely on my way out to 5000.
By riding this way, I find that the vibration is hardly a great annoyance.
Because the R65 has the famous boxer's torque from below 3500, I rarely
go above 4000 in the city, and I like to keep the rpms up when riding
through the canyons.
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/ \
_______| |_______
/ | Darryl | \
___/|________|Richman |________|\___
/ | | | | | | ...!ima | | | | | | \
| | | \`|'/ | !ism780 | \`|'/ | | |
| | | -( )- | !darryl | -( )- | | |
| | | /| |\ | | /| |\ | | |
\_______| |___ ___| |_______/
| | |________| | |
`-' `-'lrd@drusd.UUCP (DuBroffLR) (06/26/84)
Does anybody out there have any experience with the BMW R65 vibration problem, starts at about 4500rpm ? Does anybodyknow if BMW has plans to provide a retrofit fix anytime in the near future ? If you don't already belong to the BMW Motorcycle Owners of America, a check for $15 sent to BMWMOA P.O. Box 128 Florissant, MO 63032 will bring you many benefits, including receipt of the monthly "BMW News." There have been a number of articles in this magazine's technical section dealing with this vibration problem. Dave Parker has published step-by-step instructions, using parts from automobile applications, to modify the engine mounts on the R-65. I don't have my back issue reference library handy (we're moving our household), but Dave's address is: Dave Parker Secretary, BMWMOA Editor, Tech Tips, BMW News 508 West Golf Road Libertyville, Illinois 60048 He'll probably be able to send you copies of the relevant articles.