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 #
YAMAHA 2-STROKE (CONT)
YZ125 76-82
56
123
56.0
STD
-
435M05600
2205CS
CW16
S-270
B1016
x
56.25
0.25
-
-
2215CS
50
56.5
0.5
-
-
2224CS
56.75
0.75
-
-
2234CS
57.0
1.0
-
435M05700
2244CS
57.5
1.5
-
-
2264CS
58.0
2.0
-
435M05800
2284CS
YZ125 86-88
56
123
56.0
STD
-
559M05600
2205CS
CW16
S-514
B1016
Pro-Lite
x
56.25
0.25
-
-
2215CS
*Power Valve must be modified
50
56.5
0.5
-
559M05650
2224CS
for .040 and larger
56.75
0.75
-
-
2234CS
57.0
1.0
-
559M05700
2244CS
57.5
1.5
-
559M05750
2264CS
58.0
2.0
-
-
2284CS
YZ125 89
56
123
56.0
STD
-
582M05600
2205CS
CW16
S-270
B1016
Pro-Lite
x
56.5
0.5
-
-
2224CS
*Ceramic Composite-Cylinder sleeving or
50
56.75
0.75
-
-
2234CS
replating required for oversizes
57.0
1.0
-
582M05700
2244CS
YZ125 90-92
56
124
56.0
STD
-
0910-1681
2205CS
CW16
S-514
B1016
Pro-Lite
x
57
1.0
-
0910-2867
2244CS
*Ceramic Composite-Cylinder sleeving or
50.7
replating required for oversizes
YZ125 93
56
124
56.0
STD
-
629M05600
2205CS
CW16
S-514
B1016
Pro-Lite
x
56.5
0.5
-
-
2224CS
*Ceramic Composite-Cylinder sleeving or
50.7
57.0
1.0
-
629M05700
2244CS
replating required for oversizes
YZ125 94-96
54
124
54.0
STD
-
647M05400
2126CS
CW16
S-514
B1016
Pro-Lite
x
54.5
0.5
-
647M05450
2146CS
*Ceramic Composite-Cylinder sleeving or
54.5
55.0
1.0
-
647M05500
2165CS
replating required for oversizes
56.0
2.0
-
0910-1224
2205CS
YZ125 97
54
124
54.0
STD
-
693M05400
2126CS
CW15
S-467
B1038
Pro-Lite
x
*Ceramic Composite-Cylinder sleeving or
54.5
replating required for oversizes
YZ125 97-04
54
125
54.0
STD
-
0910-0729
2126CS
CW15
-
-
Racer’s Choice Flat
x
134
56.0
2.0
-
0910-0730
2205CS
Top Conversion. No
54.5
intake window. Flat Top Conversion
Electra Coated
YZ125 98-00
54
124
54.0
STD
0903-0309 726M05400
2126CST
CW15
S-467
B1038
Pro-Lite
x
54.5
0.5
0903-0291 726M05450
2146CS
*Ceramic Composite-Cylinder sleeving or
54.5
55.0
1.0
0903-0266 726M05500
2165CS
replating required for oversizes
56.0
2.0
0903-0215 726M05600
2205CS
YZ125 01
54
124
54.0
STD
0903-0288 726M05400
2126CST
CW15
S-467
B1001
Pro-Lite
x
54.5
0.5
0903-0268 726M05450
2146CS
*Ceramic Composite-Cylinder sleeving or
54.5
55.0
1.0
0903-0228 726M05500
2165CS
replating required for oversizes
56.0
2.0
0903-0176 726M05600
2205CS
YZ125 02
54
125
54.0
STD
0903-0297 797M05400
2126CST
CW15
S-467
B1001
Pro-Lite
x
54.5
0.50
0903-0541 0910-1240
2146CS
54.5
55.0
1.0
-
0910-1241
2165CS
56.0
2.0
0903-0207 797M05600
2205CS
YZ125 03-04
54
125
54.0
STD
0903-0283 797M05400
2126CST
CW15
S-467
B1001
Pro-Lite
x
54.5
0.5
0903-0672 0910-1240
2146CS
54.5
55.0
1.0
-
0910-1241
2165CS
56.0
2.0
0903-0250 797M05600
2205CS
YZ125 97-04
54
125
54.0
STD
-
765M05400
2126CS
CW15
-
1997-00:
GP Style – Electra Coated
x
134
56.0
2.0
-
765M05600
2205CS
B1038
No intake window; pinned on
54.5
2001-04:
centerline; longer skirt than stock
B1001
YZ125 05-17
54
125
54.0
STD
0903-0724 0910-0571
2126CS
CW15
0913-0015
B1001
x
134
56.0
2.0
0903-1160 0910-0572
2205CS
54.5
YZ125 05-17 Racer’s Choice GP Style
54
125
54.0
STD
0903-0513 0910-0799
2126CS
CW15
0913-0015
B1001
Electra Coated; CSA Ring is
x
134
56.0
2.0
0903-0681 0910-0800
2205CS
Titanium Nitride coated; ArmorGlide skirt coated
54.5
144
58.0
4.0
0903-0682 0910-1255
2284CS
*Crankcase clearance required for 57mm and larger bore diameter
CT-2 175 thru 77
66
172
66.0
STD
-
471M06600
2598CD
CW16
S-259
B1021
CT-3 175 thru 77
x
66.5
0.5
-
471M06650
2618CD
DT175 79-81
50
67.0
1.0
-
471M06700
2638CD
MX175 79-82
67.5
1.5
-
-
2658CD
YZ175 76-81
66
172
66.0
STD
-
-
2598CD
CW16
S-259
B1021
IT175 76-81
x
66.5
0.5
-
374M06650
2618CD
50
67.0
1.0
-
374M06700
2638CD
67.5
1.5
-
374M06750
2658CD
68.0
2.0
-
-
2677CD
HIGH-PERFORMANCE PISTONS continued on next page.
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