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  1. Absolute toughest belt?

    Polaris Trail Boss
    A while ago I acquired a free 2000 trailboss 325 with a blown engine. Rather than repair that slug, I decided to swap in a bigger engine. It now has a 1978 Arctic Cat Spirit 500cc snowmobile twin! Its about finished, currently running well and pulls hard with the stock 325 clutches and belt...
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