BETAMOTOR 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
RR 250 Enduro
2005-2007
8592DA
74.95
STD
750XDS-3
RR 250 Enduro
2015-2019
8592DB
74.96
+0.01
750XDS-3
12.8:1
12.0:1
4019DA
87.96
STD
RR-S 350 Enduro
2015-2023
4019DB
13.4:1
13.19:1
87.97
+0.01
TPR88.00/2
4014DA
87.96
STD
RR-S 390 Enduro
2016-2023
4014DB
12.7:1
12.48:1
87.97
+0.01
TPR88.00/2
4007DA
94.96
STD
RR-S 430 Enduro
2016-2023
4007DB
12.5:1
12.30:1
94.97
+0.01
RIK95.00/2
8581DA
88.96
STD
8581DB
88.97
+0.01
RR 450 Enduro
2005-2009
8581DC
11.1:1
11.0:1
88.98
+0.02
890XSY-3
4013DA
99.96
STD
4013DB
99.97
+0.01
RR-S 480 Enduro
2016-2023
12.3:1
11.86:1
1000ADS-2
12
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