426 / 1258
ENGINE
426
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
PW80
91-06 47
47
649M04700 1850CD
S538
CW12 W5560 B1042
BW80
86-90
x
47.5
649M04750 1869CD
45.6
48
649M04800 1890CD
48.5
103498
103008
1909CD
49
103499
103009
1929CD
YZ80
74-75 47
47
102528
1850CS
S538
CW12
B1042
x
47.5
102529
1869CS
42
48
102530
1890CS
48.5
102707
1909CS
YZ80
76-80 49
49
101098
1929CD
S538
CW12
B1042
x
49.5
101099
1949CD
42
50
101100
1969CD
50.5
101530
1988CD
51
101531
2008CD
YZ80
81
49
49
1929CD
S538
CW12
B1043
x
49.5
1949CD
42
51
101221
2008CD
YZ80
82-83 47
47
101141
1850CD
S538
CW12 100128 B1043
x
47.5
101142
1869CD
1983
45.6
48
101143
1890CD
48.5
103931
1909CD
49
103932
1929CD
YZ80
84
48
48.5
103694
1909CS
S538
CW12 100129 B1015
x
49
103695
1929CS
45.6
50
101126
1969CS
YZ80
85
48
48
100945
1890CS
S538
CW12 100459 B1015
x
48.5
100908
1909CS
45.6
49
100909
1929CS
49.5
103152
1949CS
50
103153
1969CS
YZ80
86-87 48
48
100945
1890CS
S538
CW12 W5284 B1015
x
48.5
103934
100908
1909CS
45.6
49
100909
1929CS
49.5
103152
1949CS
50
103153
1969CS
YZ80
88-92 48
48
102325 569M04800 1890CS
S538
CW12 W5284 B1015
x
48.5
102326 569M04850 1909CS
45.6
49
102327 569M04900 1929CS
49.5
101919
101937
1949CS
50
101920
101938
1969CS
YZ80
93-01 46
46
101292
101186
1810CS
S517
CW14 W5353 B1012
*International Bore -
Not available in U.S.
x
47.8
YZ80
93-01 47
47
102691 646M04700 1850CS
S517
CW14 W5353 B1012
x
47.5
102692 646M04750 1869CS
47.8
48
102693 646M04800 1890CS
48.5
101281
1909CS
49
101404
101282
1929CS
YZ80
93-01 52.5 52.5
101438 767M05250 2067CSA
S288
CW14 W5353 B1012
*Crank case clear-
ance required for
50mm and larger
x
47.8
YZ85
02-16 47.5 47.5
103093 805M04750 1869CS
S517
CW14 W5983 B1012
Pro-Lite
x
48
103094 805M04800 1890CS
47.8 48.5
103095 805M04850 1909CS
49.5
101555
103836
1949CS