Sym GTS 250 Service Manual page 86

Install cylinder head side cover (3 bolts).
Install thermostat (2 bolts).
Loosen auto tensioner adjustment bolt and
remove bolt and spring.
Install tensioner and install spring and adjustment
bolt.
Install cylinder cover (4 bolts).
Install Air Injection system (AI) pipe. (4 bolts)
Install inlet pipe onto cylinder head.
Install and tighten spark plug.
Torque value: 1.0~2.0kgf-m
Caution
This model is equipped with more precision
4-valve mechanism so its tighten torque can not
be exceeded standard value in order to avoid
causing cylinder head deformation, engine noise
and leaking so that motorcycle's performance be
effected.
Install the engine onto frame (refer chapter 5).
To this chapter contents
3 bolts
Tensioner bolts
6. Cylinder Head / Valve
Thermostat bolts
4 bolts
4 bolts
6-15