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5

SERVICE INFORMATION

HC-331ES
HC-341ES

  Description

mm (in)

A Cylinder bore

When plating is worn and aluminium can be seen

B

Piston outer diameter

Min.

33. 90 (1.335)

C

Piston pin bore

Max.

8. 030 (0.3161)

D

Piston ring groove

Max.

1. 6

(0.063)

E

Piston ring side clearance

Max.

0. 1

(0.004)

F

Piston pin outer diameter

Min.

7. 97 (0.3138)

G

Piston ring width

Min.

1. 45 (0.057)

H

Piston ring end gap

Max.

0. 5

(0.02)

K

Con-rod small end bore

Max.

12. 025 (0.4734)

L

Crankshaft runout

Max.

0. 03 (0.001)

M

Clutch drum bore

Max.

51. 5

(2.03)

5K228

5K229

5K230

5K231

5K016

5K042

0

1

2

3

4

5

6

7

8

9

10

11

12

0

5

10

5K171

5K232

5K244

5K243

5K219

A

B

C

D

E

F

G

H

K

L

M

1-5 Service limits

Summary of Contents for HC-331ES

Page 1: ...n 1 12 23A 00 HC 331ES HC 341ES CONTENTS page 1 SERVICE INFORMATION 2 1 1 Specification 2 1 2 Technical data 3 1 3 Torque limits 4 1 4 Special repairing materials 4 1 5 Service limits 5 1 6 Special to...

Page 2: ...gnition system combined with electronic speed governor Spark plug BPMR8Y Exhaust Muffler type Spark arrestor muffler Starter Type ES effortless start Rope diameter x length mm in 3 0 x 830 1 8 x 32 5...

Page 3: ...e air gaps mm in 0 3 0 4 0 012 0 016 Ignition timing at 1 500 r min BTDC 10 at 3 000 r min BTDC 18 at 8 000 r min BTDC 33 at 11 000 r min BTDC 14 Carburettor Venturi Size mm in 9 0 0 354 Throttle Bore...

Page 4: ...r case cover M 4 30 45 3 4 5 26 40 Cutter Cutter bolts M 6 5 15 0 5 1 5 5 13 Cutter nuts M 6 50 70 5 7 45 60 Cutter support M 5 50 70 5 7 45 60 Handle Rear handle set M 5 50 70 5 7 45 60 Regular bolt...

Page 5: ...6 0 063 E Piston ring side clearance Max 0 1 0 004 F Piston pin outer diameter Min 7 97 0 3138 G Piston ring width Min 1 45 0 057 H Piston ring end gap Max 0 5 0 02 K Con rod small end bore Max 12 025...

Page 6: ...897702 30131 Piston pin tool Removing and installing piston pin Use 8 mm dia adapter 7 897712 07930 2 pin wrench Removing and installing pawl carrier 8 897726 16431 Oil seal tool Installing crankcase...

Page 7: ...mixture needle Parts Required 2 limiter plug P N P005 001270 1 Remove the plugs from idle mixture needle hole A and hi speed mixture needle hole B using lim iter plug tool C as follows 1 Put limiter p...

Page 8: ...mixture needle G to obtain maximum WOT engine speed just before lean drop off using 2 5mm wide blade screw driver at WOT 7 Turn Hi speed mixture needle anticlockwise to reduce WOT engine speed 200 100...

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