P 25/ 25
Repair
[3]DISASSEMBLY/ASSEMBLY
[3]-12. Engine Block (cont.)
ASSEMBLIG
(6)Mount Cylinder to Crankcase assembly. (Fig. 50)
Fig. 50
Cylinder
1.Insert Cylinder over Piston while pressing Piston rings toward the Piston’s center.
Note:
Pay attention not to let Piston rings to move onto Nock pins when it’s assembled to Cylinder (Fig. 48).
Piston rings will break
if Cylinder is mounted by force over Piston rings that are moved onto Nock pins.
2. Tighten four Hex socket head bolts in diagonal order.
Piston
Crankcase assembly
(7)Assemble Insulator to Cylinder.
Note: Apply “ThreeBond 1342” or “Loctite 242” to the thread of Hex socket head bolt.
(8)Assemble Fuel tank.
Note: • Do not forget to mount Spacer between Fuel tank and Clutch case assembly.
•Apply “ThreeBond 1342” or “Loctite 242” to the thread of Hex socket head bolt.
[3]-13. Fastening Torque
| Part description | Bolt and Screw | Fastening | ||
| Torque (N. m) | ||||
Crankcase 1 |
|
| Crankcase 2 | M5x18 Hex Socket Head Bolt | 8 |
|
|
|
|
|
|
Cylinder |
|
| Crankcase | M5x18 Hex Socket Head Bolt | 8 |
|
|
|
|
|
|
Fly wheel |
|
| Crankshaft 1 | M6 Nut | 12 |
|
|
|
|
|
|
Coil |
|
| Cylinder | M4x20 Hex Socket Head Bolt | 4 |
|
|
|
|
|
|
Muffler |
|
| Cylinder | M5x50 Hex Socket Head Bolt | 8 |
|
|
|
|
|
|
Muffler cover |
|
| Muffler | M5x5 Screw | 4 |
|
|
|
|
|
|
Clutch |
|
| Crankshaft 2 | M8 Screw (Left Hand Thread) | 12 |
|
|
|
|
|
|
Recoil starter |
|
| Blower housing | 4.5x14 Tapping Screw | 2.5 |
|
|
|
|
|
|
Plug |
|
| Cylinder | M10 | 10 |
|
|
|
|
|
|
Spur gear 9 |
|
| Clutch drum | M8 Screw (Left Hand Thread) | 8 |
|
|
|
|
|
|
Grease nipple |
|
| Gear case | M6 | 4 |
|
|
|
|
|
|
Gear case cover |
|
| Gear case | M4x16 Hex Socket Head Bolt | 4 |
|
|
|
|
|
|
Blade guard |
|
| Guide bar | M5x6 Screw | 3.5 |
|
|
|
|
|
|
Plate |
|
| Guide bar | M5x8 Screw | 3.5 |
|
|
|
|
|
|