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Chapter 2 Part A:
Air-cooled two-stroke engine
Refer to Chapter 1 for model IdentMcatlon details
Contents
Alternator
-
removal and installation
...............
.see
Chapter 9
Cooling fan
-
removal and installation
........................
11
Crankcase halves, crankshaft and connecting rod and bearings
..
.14
Cylinder
-
removal, inspection and installation
.................
8
Cylinder head
-
decarbonisation
..................
.see Chapter 1
Cylinder head
-
removal, inspection and installation
............
7
Disassembly and reassembly
-
general information
.............
6
Engine
-
removal and installation
...........................
5
General information
......................................
1
Idle speed
-
check and adjustment
................
.see
Chapter 1
Initial start-up after overhaul
.......................
,
......
.15
Major engine repair
-
general note
..........................
4
Operations possible with the engine in the frame
...............
2
Operations requiring engine removal
.........................
3
Oil pump
-
removal, inspection, installation and bleeding
........
13
Piston
-
removal, inspection and installation
..................
9
.....................
Piston rings
-
inspection and installation
10
Pulse generator coil assembly
-
removal and
.................................
installation
.see Chapter 5
Recommended running-in procedure
.......................
.16
............
Spark plug gap -check and adjustment
.see Chapter 1
............
Starter motor
-
removal and installation
.see Chapter 9
. . . . .
Starter pinion assembly
-
removal, inspection and installation
12
Degrees of difficulty
Specifications
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General
Type
....................................................
Singlecylindertwo-stroke
Capacity
.................................................
4 9 . 1 3 ~ ~
Bore
....................................................
40.0mm
Stroke
...................................................
39.1 mm
.........................................
Compression ratio
6.6 to 1
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Piston
Piston diameter (measured 25 mm down from lower ring groove,
at 90" to piston pin axis)
Standard
...............................................
39.85mm
........................................
Piston pin diameter.
12 mm
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