Refitting The Timing Chain - Derbi Dirtboy 10 Workshop Manual

E E ENGINE
E N G I N E
- Tighten the pivot and camshaft check screw complete with
the washer shown in the figure.
Locking torques (N*m)
Rocker-arm shaft and camshaft bearing screw: 3 - 4 Nm
- To complete the fastening of the cylinder head, tighten the
four cylinder head nuts in two phases in a crosswise pattern
to a torque of 8 -10 N-m.
- Lock with the same torque used for the two side fixings.
- Continue tightening the nuts by giving them three 90-de-
gree turns, following in a crosswise pattern. First locking: 6
- 7 Nm +135° +90° Relocking: 6 - 7 Nm +90° +90°FoIlo-
wing the order indicated
R R
EFITTING THE TIMING CHAIN EFITTING THE TIMING CHAIN
N.B.
SEE "REFITTING THE TIMING CHAIN", TO BE CARRIED OUT
BEFORE RECOUPLING THE HALFCRANKCASES.
- Insert the spacer on the camshaft.
- Using the markings on flywheel and stator mounting brac-
ket, position the piston at the TDC.
- Insert the chain tensioning rod and secure it in its housing.
- Ensure the chain correctly engages the timing gear-shaft
keyed to the crankshaft, on the flywheel-side.
- While keeping the piston in position, fit the chain on the
camshaft drive pulley, while maintaining the reference notch
aligned with the mark on the cylinder head.
36
- CYLINDER ASSY. AND TIMING SYSTEM
- CY LINDE R AS SY. A N D T IMIN G SYST E M