When engines are assembled for dyno testing, it's very common to just place a belt between the crank and water pump with no form of tensioner. The pulleys are placed on at the same time, rather than trying to pry the belt over the pulley.
That said, your idea of using the stock clutch setup as a tensioner is brilliant. :idea:
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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