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Posted: Tue Nov 02, 2010 6:02 pm Post subject: Hello GreenMtnMan ;
The rotary disk is an induction system that was popular with manufacturers like Bridgestone in the 60's and Suzuki and Kawasaki in the 70's [There were others !]. The rotary disk took the place of the piston port induction or the reed valve induction . It is a round disk ,with a notch cut out of it that spins around an aperture . The notch in the rotary disk controls how soon the fuel starts flowing and also for how long . I was a big rotary disk fan when I was younger as they could be ported rather easily [monetary wise] as you could cut some material off of the leading edge and some off of the trailing edge , reinstall the disk , rejet and add an expansion chamber and you had a cheap performance upgrade . For some reason this induction has a love it or hate it following . It provided great performance in the smaller bore engines , but tended to be a narrower power band in the larger bore engines [compared to reed valves ] . The other disadvantage is it made for a wide engine case as the carb was usually mounted on the side of the engine . Can Am mounted there carbs on the outside using a skunk pipe , but that was the exception . I'm no technical wiz ,but I hope this will help answer your question .
Hey Thanks - I asked because the bike I just got is a rotary disk. The fuel line goes into the air duct/boot. Can't see the carb, it must be under the cover on the side of the engine as you said.
You will see the carb when you remove that right side cover . What model did you get [Kawasaki enduro ?] . I've had a Suzuki and Kawasaki with the rotary disk and they were both over achievers and very reliable . Good luck with it and enjoy it .
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