So far the shaft splines on the steel engine drive pulley shaft are the #1 weak item of the belt drive system. ...............................................
You remember that was the weak link on the 1200cc Sportster primary drive.
I believe the tapered splines system would be a lot stronger but I suspect it might cost more to make ?
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At the time of that trip to Lancer's house I had really long shocks on my Savage and had the rear loaded with luggage. So the swing-arm bounced up to center a few times . Well , I didn't have my belt loose enough and the belt got "pulled tight" a couple times. After I got home I noticed a few belt teeth were missing ... so I put my spare belt on and learned "how to tighten the belt to max swing-arm length.
The old belt wasn't worn ... but now I wonder ??? Did the pulley get damaged somehow ? I'm sure being stretched to tight didn't help the bearings any either , so maybe 4 bounces of "too tight" at 70mph is the only thing out of normal that has happened.
Neither belt has any sign of wear , only the rear aluminum pulley.
I also wonder if "Road-Grit" imbedded into the surface of the belt might have a "Sand-paper" effect ? I'll be washing my belt every-time I wash my bike from now on !