Yamaha EH63 - Page 96

PISTONS, CAMSHAFT, CRANKCASE, AND CRANKSHAFT
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ENGINE
2. Check:
• Camshaft lobe dimensions “a”
Out of specification  Replace.
3. Check:
• Camshaft gear teeth
Cracks/damage/wear  Replace.
4. Check:
• Camshaft journal diameter “a”
Out of specification  Replace.
a
Camshaft lobe dimensions:
Lobe height “a” (Intake):
35.26–35.46 mm (1.3881–1.3960 in)
(EH63K/EH64A/EH64K/EH65A/EH65B)
35.56–35.76 mm (1.3999–1.4078 in)
(EH72A/EH72B/EH72K)
Limit:
35.16 mm (1.3842 in) (EH63K/EH64A/
EH64K/EH65A/EH65B)
35.46 mm (1.3960 in) (EH72A/EH72B/
EH72K)
Lobe height “a” (Exhaust):
35.26–35.46 mm (1.3881–1.3960 in)
(EH63K/EH64A/EH64K/EH65A/EH65B)
35.88–36.08 mm (1.4125–1.4204 in)
(EH72A/EH72B/EH72K)
Limit:
35.16 mm (1.3842 in) (EH63K/EH64A/
EH64K/EH65A/EH65B)
35.78 mm (1.4086 in) (EH72A/EH72B/
EH72K)
a
a
Camshaft journal diameter:
19.967–19.980 mm (0.7861–0.7866 in)
Limit:
19.950 mm (0.0785 in)