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  • In order to help others find info on a particular bike, be sure to put the year, make or model of bike that you are asking a question about, in the Topic Title. This will allow people to pass by posts they have no interest in.

Kawasaki S3/KH400

I'd love to have one. Reputed by more than one source to be the best of the Kawasaki triples if civility and general friendliness is of value.
 
An RD400 will outrun it. I raced one in Dumas Texas when I was on my way on a tour to Colorado Rockies from Pampa, Texas. My bike was loaded with soft bags, camping gear and a tank bag. I did have the center stand removed, DG pipes and heads though. we raced about a half dozen times until my clutch overheated and started to drag. Probably summer '78 or '79. I think I've got an old comparison test from Cycle Guide where the stock RD also outran it though.

They are old and cool though. I really like the rotary valve 350 twin, especially the scrambler, that they sold before that. RDs are super common, relatively.
 
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I don't know how a rotary valve two cycle works? Anyone have have an exploded view of Kawi triple engine.
 
I had a single cylinder Kawasaki dual sport from the 70's when I was a kid (Maybe a 175cc?), and it used a "rotary valve". I have to replace it and it looked like a rotary cutting disc with a notch cut out of it. As the engine rotated it turned and opened and closed the intake pathway from the carb to the cylinder.
 
srsupertrap said:
I don't know how a rotary valve two cycle works? Anyone have have an exploded view of Kawi triple engine.
Click to expand...
I don't know if it would be correct to call it a 'rotary valve' engine. It's a piston port two-stroke engine.
Seals on the crank separate the individual crankcases. Ports in the head. The only thing that could be construed as 'rotary valve' would be the piston.

http://www.cmsnl.com/kawasaki-h_model15137/partslist/

https://en.wikipedia.org/wiki/Two-stroke_engine
 
I also had a 3 cylinder500cc Kawi 2 smoker, but I don't think it was a rotary valve like my 175cc Kawi... I think my 3 cylinder 500 was a regular piston port engine. But that was a loooong time ago and I was about 15 years old. lol
 
If you want the sound and the smell and the garage queen buy a 3 cylinder Kawasaki ( I did)
If you want to go fast, not spend forever hunting rare parts and endless hours tweaking - Buy the RD
 
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