Delaughter Racing Products located just outside of Minneapolis. Probably one of the best Yamaha builders out there. Small shop, not a motor mill, and has his own dyno that he sets them up on. Here's his website.
800vmax4 Do you have the FIII port specs for the Vmax 540. I have both sleds and would like to set a spare engine up with the FIII specs. The vmax 540 porting up date is basically the same port timing as the 81 SRX ,just a little different transfer port timing. If you have the FIII port specs any chance I could get them from you.
Dave does all my race motors, and just about everyone elses. Cant speak highly enough about him. It can be a SLOW process getting things out of his shop, but the wait and bill are worh every penny.
800vmax4, please share thoes specs as well. i would like to tackle my own motor just for the fun of it
Monty