the other day when riding in deep snow on my 450, as usual, when the snow gets to deep the bike starts hopping but there was something different this ride.as the bike would start to hop a knocking or clunking noise would start in the drivetran somewhere so I backed off and tried the path again and same thing.checked u joints and nothing seems to be loose to me but I dont know how much play should be in them.any suggestions on what it could be? it runs fine with no noise only when it starts to hop.

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