1994-1995 Yamaha FX700 (FX1) Service Manual, Page 92Get this manual
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ENGINE UNIT, INTERMEDIATE SHAFT AND HOUSING4 Install:Oil seal [T=8 mm (0.31 in)] CDOil seal [T=10 mm (0.39 in)] -a-ring
Coat the shaft bolt with LOCTITE (572)E
Coupling: 36 N