Do I hear an echo?


For the other users who may be thinking that blasting the steels is a good idea.
Please do not.  It will not end well 99% of the time.  Of course there will always be the one guy that got away with it once and swears by the technique thereafter.  Confirmation bias then takes over.



Remember what my profession is and where I work as opposed to a random double act on an internet forum.
It takes hours rubbing up often 60 plus serviceable clutch steel plates in a typical heavy transmission and a beadblast machine is within 20 feet, yet it is strictly prohibited by the management to blast the steels to save time.  Why would that be?

Because they cone. Thats why.  And the steels I am talking about are a darn sight more robust than motorcycle parts.
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In the late 70s I used to work for a guy who ran one of the first turbocharged Kawasaki drag bikes, being raced in the UK. The clutch was initially pretty much standard, and blast cleaning the steel plates, seemed to work very well, as he won many races.

Modern clutch plates are all dimpled to help retain oil, so no need for any sort of alterations at all. Plain steel plates can be prepared using 240 wet and dry on a surface plate, but blasting is much faster and provides a more uniform finish.

The clutches on DT Yamaha's seem to be quite robust, so unless the power output has been increased significantly, I would think stock clutch parts are going to work fine?