Well, for sure always good to brandy new for the brandy new factor. Calibration is a different story. I bought the 0746-839 clutch from Kens Sports for my 99 ZL600. Stock weights in the old clutch were 48.5 grams. There was a conversion chart that came with the kit, and it called for using 50 gram weights in the new style, which according to the chart, are actually 50.5 grams (why they just dont call them 50.5 is beyond me)
The newer replacement clutches are the fixed pin type, where the weights actually are set screwed to the pins themselves, and centered in the roller by 2 o rings , one under the pins head, the other under the lock nut. The beauty of em, no more bushing maintenance about every 500-1000 miles, although the o rings do create a certain amount of resistance that from doing some research may cause the sled to be a bit jerky when doing slow speed ops, like loading on a trailer. I just went right to the thunder go rings right off the bat, so I can't be certain of that aspect.
I also haven't been able to really find a good selection of weights of this type, either typing in the wrong stuff on the search engines, dunno, I do know there sure aren't as many to choose from as the old small pinned bushedi weights
Bottom line, it works well, was well worth the price, although if you're someone who likes to really fine tune to the tee, you would be better served installing a set of the aftermarket adjustable weights. Where my machine is at, I could probably use a gram less for my setup, but the next lightest cat weight that I myself have been able to find is actually 3 grams lighter, and might throw a wrench into the whole setup. I'll just leave it alone .
