KTM 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
250 SX-F
2023 - 2025
4091DA
80.95
STD
RIK81.00/2
250 XC-F
2023 - 2025
4091DB
80.96
+0.01
RIK81.00/2
14.8:1
14.4:1
250 EXC-F
2024
4091DC
80.97
+0.02
RIK81.00/2
SX-F 350
2011-2022
8807DA
14.0:1
13.5:1
87.95
STD
TPR88.00/2
XC-F 350
2012-2022
8807DB
( '2011-2015 )
87.96
+0.01
TPR88.00/2
8807DC
87.97
+0.02
TPR88.00/2
15.0:1
14.0:1
( '2016-2019 )
15.2:1
14.2:1
( '2020-2022 )
SX-F 350
2011-2022
8810DA
13.5:1
87.95
STD
TPR88.00/2
XC-F 350
2012-2022
8810DB
( '2011-2015 )
87.96
+0.01
TPR88.00/2
8810DC
87.97
+0.02
TPR88.00/2
14.0:1
14.5:1
( '2016-2019 )
14.2:1
( '2020-2022 )
SX-F 350
2023-2025
4091DA
87.95
STD
TPR88.00/2
XC-F 350
2023-2025
4091DB
87.96
+0.01
TPR88.00/2
14.6:1
14.6:1
EXC-F 350
2024
4091DC
87.97
+0.02
TPR88.00/2
194
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