On my TZ350G that I use in the YCRT events I have modified a few small things that might be useful as it can also be used for nearly all the other street and race two-stroke Yamaha's (RD's, etc.)

As in mechanical toys everything can go wrong I always use a tiewrap around the clutch wire joint, as you can see here. Easy and it will never loosen itself...

Yamaha TZ clutch wire link