alaska van posted something that was interesting: http://www.motoredbikes.com/showpost.php?p=78386&postcount=8
A compression release is a brilliant device and it's a shame that they don't put them on motorcycles anymore. A quick flick of the release lever and the resultant 'bang' down the exhaust pipe is teeeerrrific for getting rid of a pursuing dog. I'm hunting for the model of Villiers cylinder barrel that's fitted with a compression release for my own retro motor-bicycle replica. Not that I get chased by dogs much, but the main reason is that I prefer to have a compression release over a clutch or using non period brakes.Yup, coaster brake in the rear only. you mainly use the compression release to start and stop. Remember this is 1906, no traffic, no stop signs, you just got on your bike and rode non-stop to your destination, at about 15-20 mph avoiding chickens, dogs, and horses. This direct drive method was used for a long time, even after everyone else had clutches and three speed transmssions a light weight motorcycle named Servi-cycle had no clutch from 1935 to 1940 or so.
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