KEEWAY Focus User Manual

113
SERVICE DATA
CYLINDER+PISTON+PISTON RING
Unit：mm(in)
ITEM STANDARD TOLERANCE
Piston to cylinder
clearance
0.06-0.07
(0.0024-0.0028)
0.120
(0.0047)
Cylinder bore 40.005-40.020
(1.5750-1.5756)
40.075
(1.5778)
Cylinder diameter 39.94-39.955
(1.5724-1.5746)
39.885
(1.5703)
Cylinder distortion 0.04
(0.0016)
Cylinder head distortion 0.04
(0.0016)
1
st
ring 0.02~0.06mm Piston ring free cotter end
clearance
2en ring 0.02~0.06mm
Piston ring close end
clearance
0.15-0.35
(0.0059-0.0138)
0.8
(0.0315)
1
st
ring 0.02~0.06(0.0008~0.0024)
Piston ring to groove
clearance
2en ring 0.02~0.06(0.0008~0.0024)
Piston pin bore 10.002-10.008
(0.3938-0.3940)
10.030
(0.3949)
Piston pin outside
diameter
9.994-10.000
(0.3935-0.3937)
9.98
(0.3929)
CONNECTING ROD+CRANKSHAFT
ITEM STANDARD LIMIT
Conrod small end 13.995-14.006(0.5510-0.5514) 14.040(0.5528)
Conrod deflection 3.0(0.12)
Conrod web to web width 38-38.1(1.496-1.500)
Crankshaft runout 0.05(0.002)
OIL PUMP
ITEM SPECIFICATION
Pump reduction ratio 30.000(30/1)
CCI pump discharge
ratio(full open)
1.1-1.3ml/5min(working pressure is 0.06Mpa and rotating speed
118r/min)

KEEWAY Focus Specifications

General

Brand	KEEWAY
Model	Focus
Category	Scooter
Language	English