Zenith ZPP 416 - Piston

GENERAL EM -3
Description
Specification
Limit
Valve
Valve length
Intake
Exhaust
Stem O.D.
Intake
Exhaust
Face angle thickness of valve head (Margin)
Intake
Exhaust
Valve stem to valve guide clearance
Intake
Exhaust
91.7mm (3.6102 in.)
92.3mm (3.6339 in.)
5.955 ~ 5.97mm (0.2344 ~ 0.2350 in.)
5.935 ~ 5.95mm (0.2337 ~ 0.2343 in.)
1.1mm (0.0433 in.)
1.3mm (0.0512 in.)
0.03 ~ 0.06mm (0.0012 ~ 0.0024 in.)
0.05 ~ 0.08mm (0.0020 ~ 0.0031 in.)
0.8mm (0.031in.)
1.0mm (0.039in.)
0.10mm (0.0039in.)
0.15mm (0.0059in.)
Valve guide
Installed dimension O.D.
Intake
Exhaust
Service size
12.8mm (0.504 in.)
12.8mm (0.504 in.)
0.05, 0.25, 0.50mm
(0.002, 0.010, 0.020 in.) oversize
Valve seat
Width of seat contact
Intake
Exhaust
Seat angle
Oversize
0.8 ~ 1.2mm (0.031 ~ 0.047 in.)
1.3 ~ 1.7mm (0.051 ~ 0.066 in.)
45
0.3, 0.6mm (0.012, 0.024 in.) oversize
Valve spring
Free length
Load
Squareness
44.00mm (1.7323 in.)
21.6kg/ 35mm (47.6lb/1.3780 in.)
45.1kg/ 27.2mm (99.4lb/1.071 in.)
1.5
or less
Cylinder block
Cylinder bore
Out- of- round and taper of cylinder bore
Clearance with piston
76.50 ~ 76.53mm (3.0118 ~ 3.0130 in.)
Less than 0.01mm (0.0004 in.)
0.025 ~ 0.045mm (0.0009 ~ 0.0017 in.)
Piston
O.D.
Service size
76.465 ~ 76.495mm (3.0104 ~ 3.0116 in.)
0.25 mm (0.010 in.) oversize
Piston ring
Side clearance
No. 1
No. 2
Endgap
No. 1
No. 2
Oil ring side rail
Service size
0.04 ~ 0.085 mm (0.0015 ~ 0.0033 in.)
0.04 ~ 0.085 mm (0.0015 ~ 0.0033 in.)
0.15 ~ 0.30 mm (0.0059 ~ 0.012 in.)
0.30 ~ 0.45 mm (0.012 ~ 0.0177 in.)
0.2 ~ 0.7 mm (0.0078 ~ 0.0275 in.)
0.25 mm (0.010 in.) oversize
0.1 mm (0.004 in.)
0.1 mm (0.004 in.)
1.0 mm (0.039 in.)
1.0 mm (0.039 in.)
1.0 mm (0.039 in.)
ZENITH POWER PRODUCTS - 416