KTM 4-STROKE
MODEL
YEARS
PISTON PART # WÖSSNER COMPR. RATIO OEM COMPR. RATIO
PISTON SIZE
OVERSIZE
RING SET
400 SX RACING
2000-2002
8580DA
88.94
STD
GNH8900
400 EXC RACING
2000-2007
8580DB
88.95
+0.01
GNH8900
11.0:1
11.0:1
8580DC
88.96
+0.02
GNH8900
400 SX RACING
2000-2002
400 EXC RACING
2000-2007
8636DA
12.5:1
11.0:1
88.94
STD
890XSY-3
EXC 400 RACING
2009-2011
8806DA
94.95
STD
RIK95.00/2
XC-W 400
2009-2010
8806DB
94.96
+0.01
RIK95.00/2
11.1:1
11.1:1
8806DC
94.97
+0.02
RIK95.00/2
450 MXC-G RACING
2003 - 2005
8581DA
88.96
STD
890XSY-3
450 EXC-G RACING
2003 - 2006
8581DB
88.97
+0.01
890XSY-3
11.1:1
11.0:1
450 EXC RACING
2003 - 2007
8581DC
88.98
+0.02
890XSY-3
450 XC-W
2007
SX 450 RACING
2003-2006
8560DA
94.96
STD
RIK95.00/2
SM-R 450
2004-2007
8560DB
94.97
+0.01
RIK95.00/2
12.0:1
12.0:1
XC 450
2007
8560DC
94.98
+0.02
RIK95.00/2
198
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