I dont personally, but I know of a few around here who are. There is some machining involved to the head and the cylinder, a deck mod, and is either on the top of the jug or the bottom. They shave off a few mm's from what I remember. There is tons of info and people running them over at air foolers dot com . ------- Jon.
THE 80's RAGE! Currently owns:
81, 85 Yamaha Tri Moto 125
83 Yamaha Tri Moto 200 x2
82,83 Yamaha Tri Moto 175 project
85 Yamaha Tri Z 250
84 Kawasaki Tecate 250
84 Honda ATC 70
85 Honda ATC 350X
84 Honda ATC 250R
(2) 84 Honda ATC 200x
82, 83 Honda ATC 185s
81 ATC 200
Lots of other parts and bikes