Yamaha Jupiter MX - Maintenance Specifications

Item Standard Limit
Cylinder head
Max. warpage “*” ---- 0.03 mm
(0.0012 in)
Cylinder
Bore 54.000 – 54.010 mm (2.1260 – 2.1264 in) 54.1 mm
(2.1299 in)
Out of round limit ---- 0.05 mm
(0.002 in)
Camshaft
Drive Method Chain drive (left)
Cam dimensions
Intake “A” 29.643 – 29.743 mm (1.1670 – 1.1710 in) 29.613 mm
(1.1659 in)
“B” 25.073 – 25.173 mm (0.9871 – 0.9911 in) 25.043 mm
(0.9859 in)
Exhaust “A” 29.942 – 30.042 mm (1.1788 – 1.1828 in) 29.912 mm
(1.1776 in)
“B” 25.019 – 25.119 mm (0.9850 – 0.9889 in) 24.989 mm
(0.9838 in)
Camshaft runout limit ---- 0.03 mm
(0.0012 in)
Timing chain
Timing chain type/No. of links SILENTCHAIN/96 ----
Tensioning system Automatic ----
Rocker arm/rocker arm shaft
Rocker arm inside diameter 9.985 – 10.000 mm (0.3931 – 0.3937 in) 10.030 mm
(0.0012 in)
Rocker arm shaft outside diameter 9.966 – 9.976 mm (0.3924 – 0.3928 in) 9.950 mm
(0.3917 in)
Rocker-arm-to-rocker-arm-shaft 0.009 – 0.034 mm (0.0004 – 0.0130 in) 0.08 mm
clearance (0.0031 in)
SPEC
MAINTENANCE SPECIFICATIONS
2-4
MAINTENANCE SPECIFICATIONS
ENGINE
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