2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 239Get this manual

2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 239

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r , Remove the left wheel and hub (page' 43)
Remove the brake disc hub from the axleRemove the O-ring from the groove in the brake disc hub

loosen Ihe drive chain adjuster (page 3-1