BannedCR500Riders.com

http://www.ebay.com/itm/1985-Honda-CR50 ... 55&vxp=mtr

Well it looks legit but I doubt many have ever heard of this option. I know I haven't. Would be pretty cool and rare to have though

its a cut down '84 cyl, hillclimber style

And what would the advantage of this be ? It seems, even on a fully finned air-cooler, the tolerances have to be slacker than liquid cooled equivalents, with the subsequant loss of horsepower. How much worse would it be on that stubby finned thing ? When I was a kid riding small capacity air cooled KTMs, I experimented with converting them to liquid cooling, in the quest for tighter tolerances and more consistant power output. (never particularly succesful, as the barrel and head were enclosed seperately, and linked with external pipes. Not conducive to equal heat transfer, which was the entire object of the exercise. . . . ).
I'm not being facetious, this is a genuine question. Why would anyone want to take such a backwards step in technology ?

maybe there running methanol and cooling isnt an issue?

a finner is gonna be a lot more crash proof

True dat

I had no idea what it was, looks quite exotic and have never seen anything like it before. When they said it was 85, I was wondering myself why anyone would convert their liquid cooled machine back to a finner.