The Bike Bandit Blog has an interesting article about a relatively new Boost method - http://www.bikebandit.com/blog…utm_content=drum_chargers
Unfortunately, it doesn't look like a candidate for engines with more than 2 cylinders.
Interesting New Boost Method
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Never heard of this before. Pretty neat concept.
I did see an electric hybrid style supercharger that was on TV the other day. It was an "on demand" style supercharger.
It took 275 pounds of batteries to works occasionally.
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Wow! 275 lbs!
The electric unit discussed here - Wild Weasel Tests An Electric Supercharger looks interesting, but I haven't really seen anything new from the maker in several years. No response to my emails.