I have seen them for both air cooled, and liquid, and own one myself for an 84 R. They are an old school when the 3 wheeler was new pipe. They are an uncommon pipe, more rare then many of the older ones. They are real good in the top end gain, and a little in the middle. You may loose a little bottom end, but who needs that anyways. An old school cool pipe for sure. Is yours for air or liquid?
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