1988-1994 Honda TRX300 Fourtrax, 1988, 1990-1994 TRX300FW Fourtrax Service Manual, Page 149Get this manual

CRANKCASECRANKSHAFTTRANSMISSION Place the engine with the left crankcase down and remove the right crankcase
Remove the dowel pins and gasket
INSPECTION
Check the cam chain tensioner for excessive wear or damage

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