YAMAHA 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
8187DA
47.95
STD
RSB4800
8187D050
48.45
+0.50
RSB4850
YZ 80
1988-1992
8187D100
48.95
+1.00
RSB4900
45.60
27.00
8187D150
49.45
+1.50
RSB4950
8187D200
49.95
+2.00
RSB5000
8188DA
46.95
STD
RSB4700
8188DB
46.96
+0.01
RSB4700
8188DC
46.97
+0.02
RSB4700
YZ 80 USA BORE 82cc
1993-2001
47.80
26.00
8188D050
47.45
+0.50
RSB4750
8188D100
47.95
+1.00
RSB4800
8188D150
48.45
+1.50
RSB4850
8188D200
48.95
+2.00
RSB4900
8239DA
45.95
STD
RSB4600
8239DB
45.96
+0.01
RSB4600
YZ 80 INTERNATIONAL BORE 79cc
1993-2001
47.80
26.00
8104DA
47.45
STD
RSV4750
8104DB
47.46
+0.01
RSV4750
YZ 85
2002-2025
8104DC
47.47
+0.02
RSV4750
47.80
26.00
8104D500
52.45
+5.00
RSB5250
8330DA
47.45
STD
RSV4750
8330DB
47.46
+0.01
RSV4750
8330DC
47.47
+0.02
RSV4750
YZ 85
2002-2025
47.80
26.00
8330D500
52.45
+5.00
RSB5250
260
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