YAMAHA 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
4092DA
96.96
STD
RIK97.00/2
4092DB
96.97
+0.01
RIK97.00/2
YZ 450 F
2023-2025
4092DC
13.0:1
13.0:1
96.98
+0.02
RIK97.00/2
4093DA
96.96
STD
RIK97.00/2
4093DB
96.97
+0.01
RIK97.00/2
4093DC
96.98
+0.02
RIK97.00/2
YZ 450 F
2023-2025
13.5:1
13.0:1
XT 500
1976 - 1990
8505DA
86.93
STD
870XSY-3
TT 500
1979 - 1981
8505D050
87.43
+0.50
875XSY-3
SR 500
1978 - 1999
8505D100
87.93
+1.00
880XSY-3
9.8:1
9.0:1
8505D150
88.43
+1.50
885XSY-3
8505D200
88.93
+2.00
890XSY-3
8505D300
89.93
+3.00
900XSY-3
XT 600
1984 - 2004
4044DA
94.93
STD
GNH95.00
TT 600 R
1984 - 2004
4044D100
95.93
+1.00
GNH96.00
SRX 600
1984 - 1996
4044D200
96.93
+2.00
GNH97.00
10.0:1
8.5:1
TENERE' 600
1984 - 1996
298
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