Yamaha EF7000 - Page 150

7-6
SPEC
MAINTENANCE SPECIFICATIONS
Valve: mm (in)
Valve
Head diameter “A” IN 32.0 (1.26)
EX 28.0 (1.10)
Stem diameter “B” IN 5.948–5.963 (0.2342–0.2348)
EX 5.940–5.955 (0.2339–0.2344)
<Limit> IN 5.918 (0.2330)
EX 5.910 (0.2327)
Stem length “C” IN 88.1 (3.47)
EX 88.1 (3.47)
Valve face contact width “D”
IN 0.9–1.1 (0.0354–0.0433)
EX 0.9–1.1 (0.0354–0.0433)
<Limit> IN 1.6 (0.063)
EX 1.6 (0.063)
Valve seat contact width IN 0.9–1.1 (0.0354–0.0433)
EX 0.9–1.1 (0.0354–0.0433)
<Limit> IN 1.6 (0.063)
EX 1.6 (0.063)
Valve stem runout limit 0.01 (0.0004)
“θ” 90°
Valve guide
Guide inside diameter IN 6.000–6.012 (0.2362–0.2367)
EX 6.000–6.012 (0.2362–0.2367)
Stem to guide clearance IN 0.037–0.064 (0.00146–0.00252)
EX 0.045–0.072 (0.00177–0.00283)
Valve clearance (cold) IN 0.05–0.09 (0.0020–0.0035)
EX 0.05–0.09 (0.0020–0.0035)
Push rod: mm (in)
Runout limit 0.5 (0.02)
Valve spring: mm (in)
Free length IN 36.2 (1.4252)
EX 36.2 (1.4252)
<Limit> IN 34.39 (1.35)
EX 34.39 (1.35)
Set length IN 29.0 (1.14)
EX 29.0 (1.14)
Set force IN N (kgf, lbf) 91.20–104.92 (9.30–10.70, 20.50–23.59)
EX N (kgf, lbf) 91.20–104.92 (9.30–10.70, 20.50–23.59)
Tilt limit mm (in) 1.2 (0.047)