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)
DT400 75-78
85
397
85.0
STD
-
-
3347TD
CW18
S-277
B1003
MX400 75-78
x
85.5
0.5
-
232M08550
3366TD
70
86.0
1.0
-
232M08600
3386TD
86.5
1.5
-
-
3405TD
87.0
2.0
-
-
3425TD
YZ400 76-78
85
397
85.0
STD
-
-
3347TD
CW18
S-277
B1003
IT400 76-78
x
85.5
0.5
-
394M08550
3366TD
70
86.0
1.0
-
-
3386TD
86.5
1.5
-
394M08650
3405TD
87.0
2.0
-
-
3425TD
YZ465 80-81
85
465
85.0
STD
-
-
3347TD
CW18
S-277
B1014
IT465 81-82
X
85.5
0.5
-
451M08550
3366TD
82
86.0
1.0
-
-
3386TD
86.5
1.5
-
451M08650
3405TD
87.0
2.0
-
-
3425TD
YZ490 82-83
87
487
87.0
STD
-
478M08700
3425TD
CW18
S-277
B1014
IT490 83-84
x
87.5
0.5
-
478M08750
3445TD
82
88.0
1.0
-
478M08800
3465TD
88.5
1.5
-
-
3484TD
89.0
2.0
-
478M08900
3504TD
YZ490 84-90
87
487
87.0
STD
-
546M08700
3425TD
CW18
S-277
B1014
WR5091-93
x
87.5
0.5
-
546M08750
3445TD
Pro-Lite
82
88.0
1.0
-
546M08800
3465TD
88.5
1.5
-
546M08850
3484TD
89.0
2.0
-
546M08900
3504TD
YAMAHA 4-STROKE
TTR90E 03-06
47
90
47.0
STD
-
0910-0368
0912-0112
CW13
0913-0005
-
11:1 Hi-Compression
x
92
47.5
0.50
-
0910-0369
0912-0113
Cylinder boring required
51.8
94
48.0
1.00
-
-
0912-0114
for oversizes
102
50.0
3.00
-
-
0912-0110
110
52 .0
5.00
-
-
0912-0111
TTR125/L 00-17
54
123.7
54.0
STD
0903-0742 4752M05400 -
CW15
-
-
11:1 Compression
x
54.5
0.5
0903-0740 4752M05450 -
54
55.0
1.0
0903-0741 4752M05500 -
TTR250 99-06
73
249
73.0
STD
-
4689M07300 2874XC
CW18
-
-
10.5:1 Compression
x
73.5
0.5
-
4689M07350 2894XC
59.6
74.0
1
-
4689M07400 2913XC
YZ250F/ WR250F 01-04
77
249
77.0
STD
0903-0554 0910-0573
-
CW16
0913-0008
-
12.7:1 Compression (0903-0554/ 0910-0573)
x
262
79.0
2.0
-
0910-0574
3110XG
13.2:1 Compression (0910-0574)
53.6
YZ250F 01-04
77
249
77.0
STD
0903-0561 0910-0806
0912-0140
CW16
0913-0008
-
13.5:1 Compression
x
263
Light weight, 2-ring, gas ported
53.6
ArmorGlide skirt coated
YZ250F 01-11
77
290
83.0
6.0
-
0910-2936
3268XG
CW16
0913-0008
-
WR250F 01-13
x
12.5:1 Compression
53.6
290cc Big Bore
ArmorGlide skirt coated
YZ250F 05-07
77
250
77.0
STD
0903-0559 0910-0808
-
CW16
0913-0008
-
WR250F 05-13
x
263
79.0
2.00
-
-
3110XG
12.5:1 Compression
53.6
Nikasil Bore-Cylinder sleeving or replating
required for oversizes
YZ250F 05-07
77
250
77.0
STD
0903-0558 0910-0810
0912-0140
CW16
0913-0008
-
WR250F 05-13
x
263
79.0
2.00
-
-
3110XG
13.5:1 Compression
53.6
ArmorGlide skirt coated
2 Ring. Race Only. Nikasil Bore-Cylinder sleeving
or replating required for oversizes
YZ250F 05-07 RACER’S CHOICE SERIES
77
250
77.0
STD
-
0910-2943
-
CW16
-
-
13.5:1 High Compression
x
Boxed Forging
53.6
Shot Peened
Titanium Nitride Rings
ArmorGlide skirt coated
YZ250F 08-11
77
250
77.0
STD
0903-0937 0910-1678
-
CW16
0913-0008
-
13.5:1 Stock Compression
x
79.0
2.0
-
0910-2929
3110XG
ArmorGlide skirt coated
53.6
Nikasil Bore
YZ250F 08-11
77
250
77.0
STD
0903-0938 0910-2932
-
CW16
0913-0008
-
14:1 High-Compression
x
ArmorGlide skirt coated
53.6
Nikasil Bore
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