I used an yz top-end for my tri-z
I locked the ports in fully open position, whith a little home made bracket (not to hard)
But since the hoses connect differently on the yz top, I used the original tri-z, but maybe there is a simple sollution for that to
*1985 Yamaha Tri-z 360 big bore Ohlins with powervalves, 38-carb, boyesen reeds and pro-circuit exhaust!
*1985 Honda ATC 350x "stock"
*1981 Yamaha Tri-moto 175 "stock"
*1982 Yamaha rz350 with Jolly-moto exhaust
*2004 Kawasaki sixdirtysix Stuntbike
*1987 Pontiac Trans-Am
*1996 Pick-Up