Thread: Rear Wheel Play
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roger albert roger albert is offline
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Join Date: Aug 1999
Location: Austin, TX. USA
Posts: 11,605
The short shock short arm combo looks great sitting there on the stand, but loads the Ujoints more heaviy at full compression. Robs peter to pay paul. My concern with that has always been, that if I have to choose whether my angle is more severe at full extension or full compression, then I'll choose full extension, when the suspension is less weighted. Never made sense to me to choose the heaviest Ujoint and heaviest bike/suspension loading to correrspond. Just food for thought.
A lot of people have had no problem. I'd bet dollars to donuts that a long term study would prove them wrong. There are just not enough hard ridden, high mileage, short/short Ss out there yet. You can get a lesson from a very large data set of airheads, especially GS though. The late ones have a very similar suspension setup. Specifically, their relatively short paralevers/swingarm ratios, when coupled with sagged out rear shocks (which are rampant) very closely simulate the short/short combo. These guy eat Ujoints and driveshafts. Talk to any dealer that does a relativey large percentage of their sales in GS (such a my local TX dealer, or the one up in FtWorth) and they'll tell you the same. Also, note the large airhead paralever model driveshaft repair aftermarket (MCN recently even did an article). Or talk to most any small independent shop that does BMW repair.

The data for a very similar, _probably_ very applicable scenario/configuration is there. We just can't prove it on an S.

that's my 3 cents anyway
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Old 04-17-2003, 08:35 AM
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