as i looked up those belts they have a slightly rounder tooth and that may be the reason it wont last long. i bought a new set of chain sprockets for my 305 (16f and 33r) made by JT sprockets for $48. and o-ring chain for $35. i wanted to convert it so i can lower my rpm's and if i dont do it i got a back up plan on the shelf so if i ever break mine or sell it.
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