Yamaha FX Cruiser, Supplemental Service Manual

Page: 30 / 126

5
E
SPEC
MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINE
Item Unit
Model
FX140 FX Cruiser
Cylinder head
Warpage limit mm (in) 0.1 (0.004)
Compression pressure
*1
kPa
(kgf/cm
2
, psi)
1,350 (13.5, 192)
Cylinder
Bore size mm (in) 74.060–74.075 (2.9157–2.9163)
Taper limit mm (in) 0.08 (0.003)
Out-of-round limit mm (in) 0.05 (0.002)
Wear limit mm (in) 74.2 (2.9213)
Camshaft
Drive system Chain drive
Intake A mm (in) 32.25 (1.270)
Exhaust A mm (in) 32.65 (1.285)
Intake and
exhaust B mm (in) 25.00 (0.984)
Camshaft cap inside diameter mm (in) 24.5 (0.9646)
Camshaft journal diameter mm (in) 24.44–24.45 (0.9622–0.9626)
Camshaft-journal-to-camshaft-
cap clearance mm (in) 0.05–0.08 (0.0020–0.0031)
Maximum camshaft runout mm (in) 0.03 (0.0012)
Timing chain
Model/number of links DID SCR-0412SV/130
Tensioning system Automatic
Valves, valve seats, valve guides
Valve clearance (cold)
Intake mm (in) 0.11–0.20 (0.0043–0.0079)
Exhaust mm (in) 0.25–0.34 (0.0098–0.0134)
Valve dimensions
Valve head diameter A
Intake mm (in) 22.9–23.1 (0.9016–0.9094)
Exhaust mm (in) 24.4–24.6 (0.9606–0.9685)
Valve face width B
Intake mm (in) 1.76–2.90 (0.0693–0.1142)
Exhaust mm (in) 1.76–2.90 (0.0693–0.1142)
*1
At 760 mmHg and 20 °C (68 °F)