ENGINE
HIGH-PERFORMANCE PISTONS (CONT)
BORE (MM)
BORE OVER
WISECO
REPL.
REPL.
TOP-END
X STROKE
DISPL. SIZE
SIZES
PK KIT
PISTON
REPL. RING CIRCLIPS
WRIST PIN
BEARING
FITS MODEL
(MM)
(CC)
(MM) (MM)
PART #
PART #
SET PART # PART #
PART #
PART #
KX250F 10
77
250
77
STD
0903-0939 0910-2890
0912-0140
CW16
-
-
14.2:1 High Compression
x
ArmorGlide skirt coated
53.6
77
250
77
STD
0903-0941 0910-2895
0912-0140
-
-
-
x
ArmorGlide skirt coated
53.6
KX250F 11-14
77
250
77
STD
0903-0942 0910-2896
0912-0140
-
-
-
14.5:1 High Compression
x
53.6
77
250
77
STD
-
0910-2958
-
-
-
-
RACER’S CHOICE SERIES
x
14.5:1 High Compression
53.6
Boxed Forging
Shot Peened
ArmorGlide skirt coated
KX250F 15-16
77
-
77
STD
-
0910-3915
0912-0140
-
-
-
13.8:1 Stock Compression
x
53.6
KX250F 15-16
77
-
77
-
-
-
0912-0140
-
-
-
14.5:1 High Compression
x
ArmorGlide skirt coated
53.6
78
292
78.0
STD
-
4630M07800 -
CW17
0913-0007
-
x
*Electrofusion Bore-Cylinder sleeving or
61.2
replating required for oversizes
KLX400 03-04
90
398
90.0
STD
0903-0734 4713M09000 -
CW20
0913-0011
-
x
92.0
2.00
-
4713M09200 -
62.6
KLX400 03-04
90
398
90.0
STD
0903-0736 4714M09000 -
CW20
0913-0011
-
13.5:1 Compression
x
92.0
2.0
-
-
-
62.6
KLX400 03-04 (all)
94.5
440
94.5
4.50
0903-0738 0910-0768
-
CW20
0913-0011
-
440cc Big Bore Piston
x
12.5:1 Compression
62.6
ArmorGlide skirt coated
KLX400 03-04 (all)
94.5
440
94.5
4.50
0903-0739 -
-
CW20
0913-0011
-
440cc Big Bore Piston
x
13.5:1 Compression
62.6
KLX450R 08-09
96
449
96.0
STD
-
0910-0769
0912-0122
CW19
0913-0012
-
12:1 Compression
x
Cylinder boring and replating required for
62.1
KLX450R 08-09
96
449
96.0
STD
-
0910-0771
0912-0122
CW19
0913-0012
-
13:1 Compression
x
468
98.0
2.0
-
0910-0772
Cylinder boring and replating required for
62.1
KX450F 06-08
96
449
96.0
STD
0903-0575 0910-0769
0912-0122
CW19
0913-0012
-
12:1 Compression
x
Cylinder boring and replating required for
62.1
oversizes. ArmorGlide skirt coated
KX450F 06-08
96
449
96.0
STD
0903-0576 0910-0771
0912-0122
CW19
0913-0012
-
13:1 Compression
x
468
98.0
2.0
-
0910-0772
Cylinder boring and replating
62.1
required for oversizes. ArmorGlide skirt coated
KX450F 09-12
96
449
96.0
STD
0903-0936 0910-2935
0912-0122
CW19
0913-0012
-
x
ArmorGlide skirt coated
62.1
KX450F 09-12
96
449
96.0
STD
0903-0935 0910-2942
0912-0122
CW19
0913-0012
-
13.5:1 High Compression
x
62.1
96
449
96.0
STD
-
0910-2955
0912-0122
CW19
0913-0012
-
RACER’S CHOICE SERIES
x
13.7:1 High Compression
62.1
Boxed Forging
ArmorGlide skirt coated
KX450F 13-14
96
-
96
STD
-
0910-3172
x
62.1
DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES.
SEE PAGE 4 FOR IMPORTANT EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND WARRANTY INFORMATION.
2017 PARTS UNLIMITED OFFROAD