Over the years I have had various Yamahas ported by Bender, Hauck, + even myself. I now use a true craftsman who ports my cylinders and shapes my heads to the specs I provide him with...its not that I believe I'm that smart I just like to have a handle in the finished product.
I have always been satisfied with the job done by Bender + Hauck but you have to ensure they know what you want. If you just ask for [or don't ask a all] + pay for a mild trail port, thats all you will get. You have to be very specific on what you want. It seems, from what I've observed on the forum, that Mrviper ,as well, is very good at understanding and providing the porting job the customer is looking for.
Do your homework and be very specific on what you are looking for and using the sled for..there is no use having a sled that needs 110 octane fuel when you are only trail riding.
JM.02c
Bob