Yamaha YFM660RN Service Manual page 248

È
É
CRANKCASE
3.Fit the right crankcase onto the left crank-
case. Tap lightly on the case with a soft ham-
mer.
CAUTION:
Before installing and torquing the crank-
case holding bolts, be sure to check
whether the transmission is functioning
properly by manually rotating the shift cam
in both directions.
4.Install:
Lead guides 1
Hose guide 2
Crankcase bolts
5.Tighten:
Crankcase bolts
(follow the proper tightening sequence)
È Right crankcase
É Left crankcase
3 Bolt:
= 30 mm
4 Bolt:
= 45 mm
5 Bolt:
= 60 mm
6 Bolt:
= 65 mm
7 Bolt:
= 80 mm
NOTE:
Tighten the bolts in stages, using a crisscross
pattern.
6.Apply:
4-stroke engine oil
(to the crank pin, bearing and oil delivery
hole)
7.Check:
Crankshaft and transmission operation
Unsmooth operation → Repair.
5 - 68
ENG
10 Nm (1.0 m • kg, 7.2 ft • lb)