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KEEWAY 50cc Series User Manual
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22
ENGINE COMPONENT FIT/TOLERANCE___________
REED VALVE/ CYL
INDER HEAD
Reed Valve
seat clearance
(A)
:
< 0.2
mm
overlap
(B)
:
1
mm
Cylinder Head Surface Clearance
< 0.05
mm
CYLINDER
/PISTON
Compression
155±
5
psi
Cylinder Inner Diameter
40.005-40.020
mm
Piston Diameter
39.94-39.955
mm
Piston/Cylinder Tolerance
0.06-0.07
mm
21
23
Table of Contents
Pre-Delivery Inspection
3
Test Drive
4
Final
4
Maintenance Chart
5
Periodic Maintenance Table
5
Table of Contents
6
Preface
9
Keeway Service Guidelines
10
Electrical Precautions
10
Safety Guidelines
11
Specialty Tools Required
12
General Information
14
Terminology
14
The 2-Stroke Engine Cycle
15
Vehicle Information
18
Engine Number
18
Fuel
18
Engine Oil
18
General Specifications
19
Powertrain Specifications
20
Fastener Torque
20
Engine Component Fit/Tolerance
22
Reed Valve/ Cylinder Head
22
Cylinder/Piston
22
System Fundamentals
23
Piston Pin
23
Piston Ring
23
Kick Start Chain Reaction
23
Fuel Delivery System
24
Lubrication System
26
Disk Brake System Fundamentals
27
Seals
27
Gaskets
27
Caliper Assembly
28
Fundamental Front Absorber Theory
29
Troubleshooting and Procedure
30
Common Issues
30
Electric Starter Doesn’t Engage or Rotate
30
Only Clicking Noise When Starter Button Is Pressed
30
No-Start Condition
31
Insufficient Engine Power/Lack of Acceleration
32
Poor/Difficult Handling/Instability
34
If Turning Is Difficult
34
Wheel Wobble or Hop
34
If Scooter Tends to Lean
34
Soft Brakes or too Much Lever Travel
35
Hard Brakes or Stiff Lever Feel
35
The Battery
36
Battery Charge Procedure
36
Power Circuitry and Parasitic Draw Test Guidelines
37
Specific Tool Required
37
Parasitic Draw Test Procedure
37
Digital Multimeter
37
Magneto Assembly
39
Engine Compression Test
40
Requires Special Tool T05
40
Ignition Timing Test
42
At Idle
42
Under Throttle
42
Technical Guide for Keeway 50Cc Carburetors
43
Common Problems and Recommended Solutions
44
Quick Method for Resetting Unit Idle
44
50Cc Two Stroke Engine Carburetor
45
Mechanical Carb Right Hand Side
45
Powertrain Components
46
Carburetor Removal/Installation
46
Engine Components Removal and Installation
47
Cylinder/Head Assembly
47
Piston Assembly
48
Ring End Gap
48
Ring/Groove Tolerance
48
Lh Crankcase Cover
49
Lh Crankcase Cover and Associated Parts
50
Crankcase Assembly
51
Transmission Case Assembly
52
Drive Wheel Clutch Assembly
53
Kick Start Shaft Assembly
54
Transition Gear Assembly
55
Variator/Cvt Assembly
57
Starter Clutch Assembly
58
Chassis
59
Torque Specifications
59
Component Guide
60
Front Wheel Assembly
60
Rear Wheel Assembly
61
Exhaust Assembly
62
Front Fork Assembly
63
Triple Clamp, Washer, and Spacer
64
LH and RH Shock Absorbers
64
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KEEWAY 50cc Series Specifications
General
Brand
KEEWAY
Model
50cc Series
Category
Scooter
Language
English
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