ENGINE
HIGH-PERFORMANCE PISTONS (CONT)
STOCK BORE BORE
TOP-END
x STROKE
SIZE
OVERIZE DISPLACEMENT COMPRESSION PISTON
PK KIT
RING SET
CIRCLIP
WRIST PIN BEARING
(mm)
(mm)
(mm)
(cc)
RATIO
PART #
PART #
PART #
PART #
PART #
PART #
YFZ350 Banshee 87-06 (Liquid Cooled Twin)
64 x 54
64.0
STD
346
Stock
795M06400
0903-0467
2520CD
CW16
S-486
B1005
Long connecting rod (+5mm)
64.5
0.50
352
795M06450
0903-0465
2539CD
-
-
-
Piston. Use with Wiseco
65.0
1.00
358
795M06500
0903-0466
2559CD
-
-
-
65.5
1.50
364
795M06550
0903-0468
2579CD
-
-
-
66.0
2.00
370
795M06600
0903-0642
2598CD
-
-
-
YFZ350 Banshee 87-06 (Liquid Cooled Twin)
64 x 54
64.0
STD
346
Stock
795M06400
-
2520CD
CW16
S-486
-
Long connecting rod (+5mm) Stroker (+4mm)
64.5
0.50
352
795M06450
-
2539CD
-
-
-
piston. Use w/ Wiseco crank PART #WPC129
65.0
1.00
358
795M06500
-
2559CD
-
-
-
(Racer’s Choice)
65.5
1.50
364
795M06550
-
2579CD
-
-
-
66.0
2.00
370
795M06600
-
2598CD
-
-
-
YFM80 Badger 85-01/ YFM80 Raptor 02-06
47 x 45.6
47.0
STD
79
11:1
0910-0389
0903-0660
0912-0112 CW13
-
-
YFM80 Moto 4 85-93, YFM80/G Grizzly 05
47.5
0.50
81
0910-0390
0903-0661
0912-0113 -
-
-
48.0
1.00
83
0910-0391
0903-0662
0912-0114 -
-
-
50.0
3.00
90
-
0903-0663
-
-
-
-
YFM125R Raptor 11-13
54 x 54
54.0
STD
124
11:1
0910-4155
-
-
CW16
-
-
54.5
0.50
0910-4156
-
-
-
-
-
55.0
1.00
0910-4157
-
-
-
-
-
54 x 54
54.0
STD
124
13:1
0910-4158
-
-
CW16
-
-
54.5
0.50
0910-4159
-
-
-
-
-
55.0
1.00
0910-4160
-
-
-
-
-
YFM/ YTM 200 84-85
67 x 55.7
67.0
STD
196.3
10.25:1
4292M06700
-
2638XC
CW16
S-256
-
67.5
0.50
4292M06750
-
2658XC
-
-
-
YTM/ YFM 225 84-88
70 x 58
70.0
STD
223.6
10.25:1
4312M07000
-
2756XC
CW16
S-259
-
Moto-4 87-88
70.5
0.50
4312M07050
-
-
-
-
-
71.0
1.00
4312M07100
-
2795XC
-
-
-
YFM250 Timberwolf 90-00
71 x 58
71.0
STD
229.6
8.7:1
4675M07100
0903-0322
-
CW16
-
-
YFB250 Bear Tracker 00-04, Bruin 05-06,
71.5
0.50
4675M07150
0903-0350
-
-
-
-
Big Bear 250 07-09
72.0
1.00
4675M07200
0903-0319
-
-
-
-
74 x 58
74.0
STD
249
10.5:1
0910-2854
-
-
CW17
-
-
-
-
-
-
-
-
YFM250R Raptor 07-13
74 x 58
74.0
STD
249
13:1
0910-4164
-
-
CW17
-
-
ArmorGlide skirt coated
76.0
2.00
0910-4165
-
-
-
-
-
74 x 58
78.0
4.00
299
11:1
0910-2855
-
3189XG
CW17
-
-
Big bore sleeve required
YFM350X Warrior 87-04, YFM350 Raptor 05-13
83 x 64.5
83.0
STD
349
10.25:1
4419M08300
0903-0360
3268XC
CW19
S-376
-
83.5
0.50
4419M08350
0903-0373
3287XC
-
-
-
BW350 Big Wheel 99, YFM350 Moto 4 99
84.0
1.00
4419M08400
0903-0366
3307XC
-
-
-
ArmorGlide skirt coated
-
-
-
-
-
-
83.0
STD
349
11:1
0910-4174
-
3268XC
CW19
S-376
-
83.5
0.50
0910-4175
-
3287XC
-
-
-
84.0
1.00
0910-4176
-
3307XC
-
-
-
ArmorGlide skirt coated
-
-
-
-
-
-
YFM350X Warrior 87-04, YFM350 Raptor 05-13
83 x 64.5
83.0
STD
349
12:1
0910-3939
-
3268XC
CW19
S-376
-
83.5
0.50
0910-3940
-
3287XC
-
-
-
BW350 Big Wheel 99, YFM350 Moto 4 99
84.0
1.00
0910-3941
-
3307XC
-
-
-
ArmorGlide skirt coated
-
-
-
-
-
-
Kodiak 400 93-99/ YFM400 Big Bear 00-12
83 x 71.5
83.0
STD
386
8.6:1
-
0903-0664
3268XC
CW19
S-376
-
83.5
0.50
4676M08350
0903-0665
3287XC
-
-
-
84.0
1.00
4676M08400
0903-0666
3307XC
-
-
-
YFM400 Kodiak 00-08
84.5 x 71.5
84.5
STD
401
10.5:1
0910-3167
-
-
CW20
-
-
85.0
0.50
0910-3168
-
-
-
-
-
85.5
1.00
0910-3169
-
-
-
-
-
450 Kodiak 03-06/ 450 Grizzly 07-11
84.5 x 75
84.5
STD
420
11:1
0910-2851
-
-
-
-
-
450 Rhino 06-09/ 450 Wolverine 06-10
85.0
0.50
0910-2852
-
-
-
-
-
85.5
1.00
0910-2853
-
-
-
-
-
95 x 62
95.0
STD
439
12:1
0910-1668
0903-0474
-
-
-
-
ArmorGlide skirt-coated
96.0
1.00
449
-
0903-0498
-
-
-
-
YFZ450 04-05
95 x 62
95.0
STD
439
13:1
0910-0393
0903-0361
-
CW20
-
-
96.0
1.00
449
0910-0394
-
-
-
-
-
95 x 62
98.0
3.00
467
11.4:1
0910-2845
-
-
CW20
-
-
ArmorGlide skirt coated
(big bore cylinder required)
YFZ450 06-13 (except YFZ450R/X)
95 x 63.4
98.0
3.00
478
12.5:1
0910-2845
-
-
CW20
-
-
(big bore cylinder required)
YFZ450 06-13, YFZ450X 11,
95 x 63.4
95.0
STD
449
11.4:1
0910-1668
-
-
-
-
-
-
-
-
-
-
-
YFZ450 06-13, YFZ450X 11,
95 x 63.4
95.0
STD
449
12.4:1
0910-0393
-
-
CW20
-
-
YFZ450R 09-17
96.0
1.00
459
0910-0394
-
-
-
-
-
95 x 63.4
95.0
STD
449
14:1
0910-2849
-
-
CW20
-
-
YFM550 Grizzly 09-13
92 x 84
92.0
STD
558
10.25:1
0910-4169
-
-
CW22
-
-
2018 PARTS UNLIMITED ATV/UTV