YS performance site doesn't exist. YS performance has merged 100% with YS Parts Parts Service.

There are some tuning instructions that I have been working on but I keep getting isde tracked.

The best place right now is go here

http://www.probuild-uk.co.uk/factsheets/ys_engines.php


The 63S is very similar tot he 63 FZ so use those instructions...The only real difference is the external regulator and the setting on that screw is stock at about 1/2 to 1 turn inside of flush with the housing as opposed to flush on the FZ engine.

Troy Newman
Team YS