Joyner JNSZ1100SV Owner's Manual page 60

2. Dismounting
2.1. Removal of spark plug
2.2. There are 8 cylinder cover bolts. In
the process of removing the cylinder,
please follow the sequences shown
as the right illustration, loosen the
bolts one by one evenly and gently.。
2.3. Removal of the cylinder dustproof
sealing and cylinder cover base.
Attention The cylinder cushion cannot be
used repeatedly.
2.4. Removal of throttle adjusting
separation cushion and valve
thrusting rod
2.5. Use special tools to remove the
valve spring locking block, throttle
spring stand, valve spring, IN valve
and EX valve
2.6. Removal of valve oil seal and valve
spring washer
2.7. Clearing
(1). The accumulated carbon residue
covered on the valve must be cleared.
(1). Use scraper to clear the cylinder
cover, the air inlet and exhaust branching
pipe surfaces and bottoms
Attention
Do not damage the cylinder cover surface
by scraping
during the process of clearing.
Do not drop filth into the air inlet and the
water channel.
3. Routine checks
3.1. Cylinder cover
Use the straight knife sharp edge ruler to
measure the levelness at various points as
shown in the figure. Cylinder cover
0.10mm Air inlet branching pipe surface
0.10 mm