2-3
ESPECMAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINE
Item UnitModel
VX110 Sport VX110 Deluxe
Cylinder head
Warpage limit mm (in) 0.1 (0.004)
Compression pressure
*1 kPa
(kgf/cm2, psi)1,150 (11.5, 164)
Cylinder
Bore size mm (in) 76.000–76.015 (2.9921–2.9927)
Taper limit mm (in) 0.08 (0.003)
Out-of-round limit mm (in) 0.05 (0.002)
Wear limit mm (in) 76.100 (2.9961)
Camshaft
Drive system Chain drive
Intake A mm (in) 31.15 (1.226)
Exhaust A mm (in) 30.75 (1.211)
Intake and exhaust B mm (in) 25.00 (0.984)
Camshaft cap inside diameter mm (in) 24.5 (0.9646)
Camshaft journal diameter
Intake mm (in) 24.46–24.47 (0.9630–0.9634)
Exhaust mm (in) 24.44–24.45 (0.9622–0.9626)
Camshaft-journal-to-camshaft-
cap clearancemm (in) 0.05–0.06 (0.0020–0.0024)
Maximum camshaft runout mm (in) 0.03 (0.0012)
Timing chain
Model/number of links 92RH2015-130/130
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)
*1 Measuring conditions:
Ambient temperature 20 °C (68 °F), wide open throttle, with spark plugs removed from all
cylinders.
The figures are for reference only.
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5-56
EPOWRCYLINDER HEAD
SERVICE POINTS
Cylinder head removal
1. Remove:
Cylinder head bolts 1
2. Remove:
Cylinder head nuts
NOTE:
Loosen the cylinder head nuts in the sequence
shown.
Cylinder head inspection
1. Eliminate:
Combustion chamber carbon deposits
(with a rounded scraper)
NOTE:
Do not use a sharp instrument to avoid damag-
ing or scratching:
spark plug bore threads
valve seats
2. Check:
Cylinder head
Damage/scratches →
Replace.
Cylinder head water jacket
Mineral deposits/rust →
Eliminate.
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EPOWRCONNECTING RODS AND PISTONS
NOTE:
• Do not move the connecting rod or crank-
shaft until the clearance measurement
has been completed.
Lubricate the bolts threads and nut seats
with molybdenum disulfide grease.
Make sure the “Y” mark c on the con-
necting rod faces towards the front side of
the crankshaft.
Make sure the characters d on both the
connecting rod and connecting rod cap
are aligned.
Tighten the connecting rod nuts.
Refer to “Connecting rod and piston
installation”.
Remove the connecting rod and big end
bearings.
Refer to “Connecting rod and piston
removal”.
Measure the compressed Plastigauge
width e on the crankshaft pin.
If the big end oil clearance is out of speci-
fication, select replacement big end bear-
ings.
cd
e
2. Select:
Big end bearings (P
1–P4)
NOTE:
The numbers stamped into the crankshaft web
and the numbers on the connecting rods are
used to determine the replacement big end
bearing sizes.
P4
P3P2
P1
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