428 / 1258
ENGINE
428
body
accessories
handlebar
& grips
cables &
levers
electrical
& ignition
engine
fuel &
intake
clutch
brakes
drive
steering &
suspension
bearings
tires
tools &
shop
exhaust
MODEL YEAR
BORE
X
STROKE
BORE
SIZE
TOP
END
KIT
SINGLE
PISTON RING SET PIN CLIP
TOP END
GASKET
KIT
TOP END
BEAR-
ING
YAMAHA (2-STROKE)
CONTINUED
YZ125
86-88 56
56
103264 559M05600 2205CS
S514
CW16 W4904 B1016
*Power Valve must
be modified for
57mm and larger
x
56.5
103262 559M05650 2224CS
50
57
103263 559M05700 2244CS
57.5
559M05750 2264CS
58
559M05800 2284CS
YZ125
89
56
56
582M05600 2205CS
S270
CW16 W5167 B1016
x
56.5
582M05650 2224CS
50
57
582M05700 2244CS
YZ125
90-92 56
56
594M05600 2205CS
S514
CW16 W5229 B1016
x
56.5
594M05650 2224CS
90-91
50.7
57
594M05700 2244CS
W5354
1992
YZ125
93
56
56
629M05600 2205CS
S514
CW16 W5354 B1016
x
56.5
629M05650 2224CS
50.7
57
103998 629M05700 2244CS
YZ125
94-96 54
54
103478 647M05400 2126CS
S514
CW16 W5420 B1016
x
54.5
103479 647M05450 2146CS
54.5
55
647M05500 2165CS
56
101630 647M05600 2205CS
YZ125
97
54
54
693M05400 2126CS
S467
CW15 W5420 B1038
x
54.5
YZ125
97-04 54
54
765M05400 2126CS
S632
CW15 W5420 B1038
x
56
765M05600 2205CS
1997
97-00
54.5
W5677
98-01
B1001
W5981 01-04
2002
W6140
03-04
YZ125
97-04 54
54
762M05400 104608
S632
CW15 W5420 B1038
x
56
762M05600 2205CS
1997
1997-
2000
54.5
W5677
98-01
B1001
W5981 01-04
2002
W6140
03-04
YZ125
98-00 54
54
101538 726M05400 2126CST
S467
CW15 W5677 B1038
x
54.5
101539 726M05450 2146CS
54.5
55
101540 726M05500 2165CS
56
101177 726M05600 2205CS
YZ125
01
54
54
101541 726M05400 2126CST
S467
CW15 W5677 B1001
x
54.5
101542 726M05450 2146CS
54.5
55
101543 726M05500 2165CS
56
101178 726M05600 2205CS
YZ125
02
54
54
104180 797M05400 2126CST
S467
CW15 W5981 B1001
x
54.5
104181 797M05450 2146CS
54.5
55
797M05500 2165CS
56
102002 797M05600 2205CS
YZ125
03-04 54
54
101302 797M05400 2126CST
S467
CW15 W6140 B1001
x
54.5
101303 797M05450 2146CS
54.5
55
101304 797M05500 2165CS
56
102003 797M05600 2205CS