Re: Cracked System Bag Hook

[Bob MacFarland <emoto1@xxxxxxxxxxx>]

Tony P wrote:

>Bob,
>Unlike myself, you are the master of the obvious!  You hit the nail (or
>final drive as it were) right on the head.  I looked inside the rear
>fender and found a clean tire scuff mark.  It takes 5.5 inches of
>suspension travel for the tire to hit the fender.  It only takes 5
>inches of suspension travel for the final drive to hit the system case.
>I also saw the telltale black vertical mark on the drive you spoke of.
>(Please remind me how well BMW motorcycles are engineered, I'm beginning
>to have my doubts).  Now my problem becomes deeper: will cranking up the
>preload be sufficient or do I need more compression dampening with a new
>shock.  Remember, I was one up with empty cases when I hit the bump and
>broke the case.
>Thanks everyone for all the help,
>Tony
>1997 R1100RS red
>

Well, how about that!  Isn't it amazing that we could have looked at our 
bikes and missed something like that? I found that for myself, cranking 
up the preload was enough. Less than a year after I increased the 
preload, I went to Ohlins shocks, and they were set up for my weight so 
there was absolutely no problem from then on.

>>I broke two hooks on system cases when I had a 1996 R1100RS. Couldn't 
>>figure out what was going on until much time had passed. Turned out I 
>>was running the shock preload too soft and upon extreme compression 
>>(hitting a big bump when loaded heavily) the side of the final drive 
>>housing was striking the inside of the bag and causing the break. You 
>>could actually see a very slight discoloration in the form of 
>>a vertical stripe on the final drive casing where it was rubbing
>>    
>>
>against 
>  
>
>>the inside of the system case. I cranked up the preload some and the
>>    
>>
>problem was 
>  
>
>>solved!
>>
>>    
>>


- -- 
Bob
     Eventual Master of the Obvious
  R1200GS CB750F DoD EMOTO BMWMOA SOHC4
Proud walking jingle in the midnight sun

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