OSP or Thunder Proucds belt adjuster?

Just put the TPI one on mine over the Christmas break with the 8DN belt. Works like a charm. RPM up about 400 to where they should be over the stock setup. I don't think there are huge differences in the belt adjusters from one brand to the next. From what I can tell, they are a pretty simple design to accomplish what they need to do (which is good). The new Thunder one no longer comes with the hardened washer. Install is about one beer if you are taking your time. Belt changes are a breeze now.
 
I am building the prototypes for the srx/sxr/RX1 and older Yamaha's. Will be real close to the one I built for the Viper and Winder for Thunder Products.
 


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