YAMAHA 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
YZ 450 F
2014-2017
8895DA
96.96
STD
RIK97.00/2
YZ 450 FX
2016-2018
8895DB
96.97
+0.01
RIK97.00/2
12.5:1
12.5:1
WR 450 F
2016-2018
8895DC
96.98
+0.02
RIK97.00/2
YZ 450 F
2014-2017
8896DA
96.96
STD
RIK97.00/2
YZ 450 FX
2016-2018
8896DB
96.97
+0.01
RIK97.00/2
WR 450 F
2016-2018
8896DC
96.98
+0.02
RIK97.00/2
13.5:1
12.5:1
YZ 450 F
2018-2019
8949DA
96.96
STD
RIK97.00/2
YZ 450 FX
2019-2020
8949DB
96.97
+0.01
RIK97.00/2
12.9:1
12.8:1
WR 450 F
2019-2020
8949DC
96.98
+0.02
RIK97.00/2
YZ 450 F
2018-2019
8950DA
96.96
STD
RIK97.00/2
YZ 450 FX
2019-2020
8950DB
96.97
+0.01
RIK97.00/2
13.6:1
12.8:1
WR 450 F
2019-2020
8950DC
96.98
+0.02
RIK97.00/2
YZ 450 F
2020-2022
8965DA
96.96
STD
RIK97.00/2
YZ 450 FX
2021-2023
8965DB
96.97
+0.01
RIK97.00/2
13.2:1
13.0:1
WR 450 F
2021-2023
8965DC
96.98
+0.02
RIK97.00/2
294
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