I know I have to take out the clutch limiter, washer at the beginning of the head pipe, and sparky. I know there has to be more than that. Going to buy new filter soon, and get into the carb. I don't really want to bore it though.
What I remember reading
1. Clutch spacer
2. washer restricting exhaust mounted @ the beginning of the head pipe
3. washer restricting the intake mounted @ the carb
4. sparky can be modified with a larger washer welded in to maintain USFS Regs.
5. K&N w/Outerwares upgrade
6. Drilling holes in the airbox lid
7. possible air baffle in the airbox or intake ( I don't remember )
8. In the carb there's a removable jet that restricts fuel
9. DynaTek Ignition advances the timing ( $175 Ebay )
10. Rejet
11. Exhaust pipe
12. 88cc race engine
7 of these mods are free to the consumer & jetting & K&N are cheap mods
I read about this on Z400 central & the popular opinion was that the DynaTek was a big gain, definately worthwhile. A Z50 with all 11 mods could & would spank 80 & 90 quads all day providing they weren't Cobra's or Pro Sharks. Oh yea, with most mods performed the Igniton Timing is so stupid that it leaves the little 50 hitting the very low RPM limiter & thank DynaTek that their igniton raises the RPM limiter
Polarass525 - I think you & Tommy could fab a header pipe for the quad & see what that does for it. It looks as if a conduit bender would work for making the header