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 #
RT180 90-98
64.5
176
64.5
STD
-
0910-2875
2539CD
CW16
S-486
-
x
0.5
-
0910-2876
2559CD
54
1.0
-
0910-2877
2579CD
66
195
66.0
STD
-
522M06600
2598CD
CW16
S-259
B1005
x
66.5
0.5
-
-
2618CD
57
67.0
1.0
-
522M06700
2638CD
67.5
1.5
-
-
2658CD
68.0
2.0
-
522M06800
2677CD
66.8
199
66.8
STD
-
0910-0801
2628CD
CW16
-
-
x
67.0
0.20
-
-
2638CD
57
67.5
0.70
-
-
2658CD
68.0
1.20
-
-
2677CD
68.5
1.70
-
0910-0805
2697CD
YZ250 76-79
70
246
70.0
STD
-
234M07000
2756CD
CW18
S-343
B1003
x
70.5
0.5
-
234M07050
2776CD
DT250 74-79
64
71.0
1.0
-
234M07100
2795CD
MX250 73-75
71.5
1.5
-
-
2815CD
72.0
2.0
-
234M07200
2835CD
70
246
70.0
STD
-
452M07000
2756CD
CW18
S-343
IT250
IT250 81-82
x
70.25
0.25
-
-
2766CD
81-82
64
70.5
0.5
-
-
2776CD
B1003;
70.75
0.75
-
-
2786CD
YZ250,
71.0
1.0
-
452M07100
2795CD
80-81
71.5
1.5
-
452M07150
2815CD
B1003;
72.0
2.0
-
452M07200
2835CD
YZ250
82 B1014
IT250 83
68
246.8
68.0
STD
-
515M06800
2677CD
CW18
S-511X
B1014
x
68.25
0.25
-
-
2687CD
68
68.5
0.5
-
515M06850
2697CD
68.75
0.75
-
-
2707CD
69.0
1.0
-
515M06900
2717CD
69.25
1.25
-
-
2727CD
69.5
1.5
-
-
2736CD
70.0
2.0
-
515M07000
2756CD
YZ250 83-87
68
246.8
68.0
STD
-
560M06800
2677CD
CW18
S-511X
B1014
Pro-Lite
x
68.25
0.25
-
-
2687CD
68
68.5
0.5
-
560M06850
2697CD
for .040 and larger
69.0
1.0
-
560M06900
2717CD
69.5
1.5
-
560M06950
2736CD
70.0
2.0
-
560M07000
2756CD
68
246.8
68.0
STD
-
605M06800
2677CD
CW18
S-508
B1014
x
68.5
0.5
-
605M06850
2697CD
Pro-Lite
68
69.0
1.0
-
605M06900
2717CD
*Power Valve must be
69.5
1.5
-
605M06950
2736CD
modified for .040 and larger
70.0
2.0
-
605M07000
2756CD
Composite Cylinder sleeving
or replating required for oversizes
YZ250 92-94
68
246.8
68.0
STD
0903-0716 677M06800
2677CD
CW18
S-508
B1014
x
68.5
0.5
0903-0717 677M06850
2697CD
Pro-Lite
68
69.0
1.0
0903-0718 677M06900
2717CD
*Ceramic Composite -
70.0
2.0
0903-0719 0910-1231
2756CD
Cylinder sleeving or replating required for oversizes
YZ250 92-98
68
246.8
68.0
STD
-
0910-1233
2677CS
CW18
S-508
B1014
Racer’s Choice
x
68
YZ250 95-98
68
246.8
68.0
STD
0903-0720 677M06800
2677CD
CW18
S-508
B1014
WR250 95-98
x
68.5
0.5
-
677M06850
2697CD
68
69.0
1.0
0903-0722 677M06900
2717CD
*Ceramic Composite -
70.0
2.0
0903-0723 0910-1231
2756CD
Cylinder sleeving or replating required for oversizes
YZ250 99-01
66.4
249
66.4
STD
0903-0921 804M06640
2614CD
CW18
S-508
B1003
x
67.0
0.6
-
0910-1244
2638CD
72
67.5
1.1
-
0910-1245
2658CD
replating required for oversizes
68.5
2.10
-
0910-0207
2697CD
YZ250 02-17, YZ250X 16-17
66.4
249
66.4
STD
0903-0308 804M06640
2614CD
CW18
S-508
B1003
Pro-Lite
x
67.0
0.6
0903-0524 0910-1244
2638CD
72
67.5
1.1
0903-0543 0910-1245
2658CD
68.5
2.10
0903-0188 0910-0207
2697CD
for oversizes
YZ250 02-17, YZ250X 16-17
66.4
249.3
66.4
STD
0903-0929 0910-0367
0912-0106
CW18
S-508
B1003
250cc Racer’s Choice Single
x
Ring. Electra Coated
72
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SEE PAGE 4 FOR IMPORTANT EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND WARRANTY INFORMATION.
2017 PARTS UNLIMITED OFFROAD