Generic XOR 125, Service Manual

Page: 11 / 97

10
Cylinder head nuts and exhaust pipe bolts
Tighten at each service.
If cylinder head nuts are not tightened to the specified torque, may result
in leakage of compressed fuel-air mixture and reduce output, tighten the
cylinder head nuts in the following procedures:
：
1
．
Remove the frame lower covers.
2
．
Remove the cylinder head cover bolt.
3 ． Remove spark plug cap.
4
．
Tighten the nuts evenly one by one to the their specified torque.
Tighten the nuts in the order indicated.
Tightening torque
：
Cylinder head nut
：
15-18N.m
Exhaust pipe bolt
：
15-18N.m
Cylinder and cylinder head
Clean carbon every 6000 km
Carbon deposits in the combustion chamber and the cylinder head will
raise the compression ratio and may cause preignition and overheating.
Carbon deposited at the exhaust port of the cylinder will prevent the flow
of exhaust gases, reducing the output. Remove carbon deposits
periodically.