BETAMOTOR 2-STROKE
MODEL
YEARS
PISTON PART #
PISTON SIZE
OVERSIZE
RING SET
STROKE
COMPRESSION HEIGHT
RR 250 Enduro
2013-2025
8310DA
66.34
STD
RSB6640
Xtrainer 250
2018-2025
8310DB
66.35
+0.01
RSB6640
8310DC
66.36
+0.02
RSB6640
72.00
38.20
RR 300 Enduro
2013-2017
8298DA
71.96
STD
RSB7200
Xtrainer 300
2015-2017
8298DB
71.97
+0.01
RSB7200
72.00
38.00
8298DC
71.98
+0.02
RSB7200
RR 300 Enduro
2018-2021
8309DA
71.96
STD
RSB7200
Xtrainer 300
2018-2021
8309DB
71.97
+0.01
RSB7200
72.00
37.50
RX 300
2021-2024
8309DC
71.98
+0.02
RSB7200
RR 300 Enduro
2022-2025
8324DA
72.96
STD
RSB7300
Xtrainer 300
2022-2025
8324DB
72.97
+0.01
RSB7300
69.90
38,00
8324DC
72.98
+0.02
RSB7300
2017-2025
8333DA
78.95
STD
RSC7900
8333DB
78.96
+0.01
RSC7900
EVO 300 TRIAL
60.50
28.8
10
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