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I believe it’s the same design as the ones you speak of from the 70’s and later. The newer PB 80 versions that are popular are produced by CV Tech. They also produced smaller versions that came on fan cooled skidoos. I believe Cat and Polaris used them as well.
 

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I believe it’s the same design as the ones you speak of from the 70’s and later. The newer PB 80 versions that are popular are produced by CV Tech. They also produced smaller versions that came on fan cooled skidoos. I believe Cat and Polaris used them as well.
I was looking in Phil Mickelson's Ski-doo Buyer's Guide tonight & it mentioned that the 94 Tundra used a Power Bloc clutch. I can't imagine the same clutch used on a Type 277 single cylinder motor is the same one used on motors that make 2 or 3 times the power.
 
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