02′ Grizzly not going into low gear.

I have a 2002 yamaha grizzly 660, and I have a problem with changing gears into low. Reverse and high work fine but when I try and get into low I heard a grinding sound and quit, I’ve tried several times now and I cannot get it to engage at all. Any tricks I can try? If I need to add more info just let me know, thanks.

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