Robin America EX21 - Page 82

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ITEM STD Limit
CAMSHAFT
* Cam peak height (intake and exhaust)
Cam peak
height
EX13
EX17
EX21
EX27
29.028 - 29.128
(1.1428 - 1.1468)
28.98
(1.1409)
Cam inner
diameter
D
1 ,D 2
EX13
EX17
EX21
EX27
9.0 - 9.036
(0.3543 - 0.3557 )
9.05
(0.3563)
* Cam sprocket inner diameter
* Pin (cam sprocket) outer diameter
Pin outer
diameter
D
3 ,D 4
EX13
EX17
EX21
EX27
8.953 - 8.975
(0.3525 - 0.3533)
8.95
(0.3524 )
INTAKE/EXHAUST VALVES
* Valve stem outer diameter
Intake
EX13
EX17
EX21
EX27
5.440 - 5.455
(0.2142 - 0.2148)
5.35
(0.2106)
Exhaust
EX13
EX17
EX21
EX27
5.426 - 5.444
(0.2136 - 0.2143)
5.35
(0.2106)
* Clearance between valve stem and
valve guide
Intake
EX13
EX17
EX21
EX27
0.045 - 0.078
(0.0018 - 0.0031)
0.3
(0.0118)
Exhaust
EX13
EX17
EX21
EX27
0.056 - 0.092
(0.0022 - 0.0036)
0.3
(0.0118)
* Valve clearance (in cold state)
Intake
EX13
EX17
EX21
EX27
0.12 - 0.15
(0.0047 - 0.0059)
Exhaust
EX13
EX17
EX21
EX27
0.12 - 0.15
(0.0047 - 0.0059)
D1 D
2
D 3 D 4
Unit: mm (in.)