Yamaha YP250 Mobility Scooter User Manual


 
4-10
CYLINDER HEAD
ENG
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10 Nm (1.0 mSkg)
8 Nm (0.8 mSkg)
60 Nm (6.0 mSkg)
5. Install:
STiming chain tensioner
Installation steps:
D Remove the tensioner cap bolt
1
and
springs
2
.
D Release the timing chain tensioner one-way
cam
3
and push the tensioner rod
4
all the
way in.
D Install the tensioner with a new gasket
5
onto the cylinder.
D Install the springs
2
and cap bolt
1
.
D Tighten the bolt (with gasket) to the specified
torque.
Bolt (chain tensioner)
Cap bolt (timing chain tensioner)
6. Tighten:
SBolt (cam sprocket)
7. Check:
SValve timing
Out of alignment ! Adjust.
Refer to the above steps 3 5.
8. Check:
SValve clearance
Out of specification ! Adjust.
Refer to the “VALVE CLEARANCE AD-
JUSTMENT” section in CHAPTER 3.