Is 660 Yamaha a Rotax Engine?

[JP Alexander]

A fellow familiar with MZ bikes is interested in my Tour and says the Yamaha 660 is a Rotax engine. I don't believe it is. Any definitive information to settle this question? My bike is a 2002 Skorpion Tour and watercooled.

Jim.

[Linegeist]

The air-cooled Rotax was used in the Skorpion prototype but the Yam motor was the one that made it through to production. So, unless your;s is air-cooled, you have a Yamaha engine (with an impeccable pedigree too)

There's a potted history here (in Dutch ...sorry ) http://muz.monoconnection.nl/portal/index.php?page=Een_beetje_history

Hope this helps.

[JP Alexander]

Thanks Linegeist,

just as I thought, Rotax are all air cooled and my 2002 Tour has the water cooled Yamaha. Nice island, I checked it out a few days ago online.

Jim

[DAVID THOMPSON]

rotax motor is air cooled and a good motor it dates to the early 1980,s
used by ktm in 83 84 in a bike
Armstrong CCM ATK and harley davidison in the MT 500 army bike
google HD MT500
http://www.olive-drab.com/images/id_har ... 0_full.jpg
link for engine parts
http://www.rotax.net/Engine.htm

this engine has been the king of flattrack racing for about 25years till the AMA changed the rules to get rid of it
dave