HYOSUNG RX 125 Service Manual page 53

3-23 ENGINE
● Fit the cylinder head.
● Tighten the cylinder base nuts ①, ②.
Cylinder base nut : 6~8 N∙m (0.6~0.8 kg∙m)
CAUTION
When mounting the cylinder, after attaching
camshaft drive chain, keep the camshaft drive
chain taut. The camshaft drive chain must not be
caught between cam drive chain sprocket and
crankcase when crankshaft is rotated.
CAMSHAFT
● Align the mark on magneto rotor with the index
mark on the crankcase keeping the camshaft
drive chain pulled upward.
CAUTION
If crankshaft is turned without drawing the
camshaft drive chain upward, the chain will be
caught between crankcase and cam chain drive
sprocket.
● Install the camshaft ③, bearing ④ and cam
sprocket ⑤, tighten it.
CAUTION
This ⑥ is a left-hand thread bolt.
● Align the key-groove ⑦ on the camshaft so it is
vertical with the surface of the cylinder head.
CAUTION
Do not rotate magneto rotor while doing this.
When the sprocket is not positioned correctly,
turn the sprocket.
②
①
⑥ ④
⑤
③
④
⑦