ENGINE
309
2015 OFFROAD CATALOG
accessories
body
handlebar
& grips
cables &
levers
engine
fuel &
intake
electrical
& ignition
clutch
drive
bearings
brakes
steering &
suspension
tires
tools &
shop
exhaust
SomeWiseco 4-Cycle ATV pistons have been manu-
factured with more than one ring type. The correct
replacement ring style is stamped on the dome of
the piston. EXAMPLE: 4419PS will be stamped
with either a "C" or a "G" to indicate the correct
replacement ring style to order.
ONLY WISECO
REPLACEMENT RING SETS CAN BE USED ON
WISECO PISTONS
.
REPLACEMENT RINGS
All Wiseco 4-Cycle pistons are supplied with rings, wrist pins and circlips. OnlyWiseco replacement ring sets can be used onWiseco pistons. The replacement ring type
and bore size (in millimeters) is stamped on the dome of the piston. Refer to this information to reorder correct replacement rings. Ring styles cannot be interchanged.
All Wiseco 2-Cycle pistons are supplied with rings and circlips. Only Wiseco replacement ring sets can be used on Wiseco pistons. The replacement ring type and
bore size (in millimeters) is stamped on the dome of the piston. Refer to this information to reorder correct replacement rings. Ring styles cannot be interchanged.
2-CYCLE RINGS - MOTORCYCLE & ATV
4-CYCLE RINGS - MOTORCYCLE AND ATV APPLICATIONS
One
chrome-faced high temperature steel
alloy, internally notched compression ring.
CS
CD
.039"
(1mm)
TYPE
2 CYCLE RING DIAGRAMS
DESCRIPTION
APPLICATIONS
Cast-iron, Nikasil and
Electrofusion Liners
Two
chrome-faced high temperature alloy,
internally notched compression rings.
.039"
(1mm)
.039"
(1mm)
Cast-iron, Nikasil and
Electrofusion Liners
.047"
(1.2mm)
Two
chrome-faced high temperature steel
alloy, internally notched compression rings.
.047"
(1.2mm)
Cast-iron, Nikasil and
Electrofusion Liners
CDM*
TD
TYPE
4 CYCLE REPLACEMENT RING DIAGRAMS
Oil Ring:
3 piece low
tension oil ring
.059" (1.5mm)
Top Ring:
Chrome faced
high temperature steel
alloy -
.031" (.8mm)
Compression Ring:
Taper
faced ferrox coated ductile
iron -
.031" (.8mm)
(soft nitriding coated sides
for use in plated cylinder all applications)
XC
XA
Oil Ring:
3 piece low
tension oil ring
.110" (2.8mm)
Top Ring:
Chrome faced
high temperature steel
alloy -
.039" (1mm)
Compression Ring:
Taper
faced ferrox coated cast
iron -
.047" (1.2mm)
XD
Oil Ring:
3 piece low
tension oil ring
.079" (2mm)
Top Ring:
Chrome faced
high temperature steel
alloy -
.039" (1mm)
Compression Ring:
Taper
faced ductile iron
.047" (1.2mm)
XG
Oil Ring:
3 piece low
tension oil ring
.079" (2mm)
Top Ring:
Chrome faced
high temperature steel
alloy -
.039" (1mm)
Compression Ring:
Taper
faced ductile iron
.039" (1mm)
XH
Oil Ring:
3 piece low
tension oil ring
.158" (4mm)
Top Ring:
Chrome faced
high temperature steel
alloy -
.047" (1.2mm)
Compression Ring:
Taper
faced ductile iron
.059" (1.5mm)
XJ
Top Ring:
Ductile iron
soft nitriding coated
top ring -
.047" (1.2mm)
Compression Ring:
Taper
faced ferrox coated iron
.059" (1.5mm)
Oil Ring:
3 piece low tension
oil ring
.158" (4mm)
Oil Ring: 2.5mm (.098”)
3 piece
oil assembly: Stainless steel
spacer, chrome faced rails
Top Ring:
1mm (.039”)
Alloy steel, ferrox coated,
chrome faced
Compression Ring:
1.2mm
(.047”) Cast Iron, phosphate
coated, taper faced
XE
Oil Ring: 3mm (.118”)
3 piece oil
assembly: Stainless steel flex-vent
spacer, chrome faced rails
Top Ring:
1.5mm (.057”)
Cast iron, plasma moly
faced
Compression Ring:
1.5mm
(.057”) Cast Iron, reverse
torsion
XP
Oil Ring: 2mm (.079”)
3 piece oil
assembly: Stainless steel flex-vent
spacer, chrome faced rails
Top Ring:
1mm (.039”)
Alloy steel, ferrox coated,
chrome faced
Compression Ring:
1.2mm
(.047”) Cast Iron, phosphate
coated, taper faced
XR
Oil Ring: 2mm (.118”)
3 piece oil
assembly: Stainless steel flex-vent
spacer, chrome faced rails
Top Ring:
1.2mm (.047”)
Alloy steel, ferrox coated,
chrome faced
Compression Ring:
1.2mm
(.047”) Cast Iron, phosphate
coated, taper faced
GF
Oil Ring: 2mm (.079”)
3 piece oil
assembly: Stainless steel flex-vent
spacer, chrome faced rails
Top Ring:
1mm (.039”)
Alloy steel, gas intrided
flat faced
No Compression Ring
ZV
.039"
(1mm)
Two
ferrox coated ductile iron.
internally notched compression rings.
* Designed to be used in chrome bores.
.039"
(1mm)
Cast-iron, Nikasil and
Electrofusion Liners
YB
ZS
ZC
Oil Ring: 1.5mm (.059”)
3 piece
oil assembly: Stainless steel flex-
vent spacer, nitrided rails
Oil Ring: 2.8mm (.110”)
3 piece
oil assembly: Stainless steel
spacer, chrome faced rails
Oil Ring: 2mm (.079”)
3 piece oil
assembly: Stainless steel flex-vent
spacer, chrome faced rails
No Second Ring
No Second Ring
No Second Ring
78mm (3.071) & 80mm (3.150”)
0.9mm (.035”)
Stainless steel, gas
nitrided barrel faced
95-101mm (3.740 - 3.976”)
89mm (3.504) & 91mm (3.583”)
1.2mm (.047”)
Alloy steel, ferrox
coated, chrome faced
1mm (.039”)
Alloy steel, ferrox
coated, chrome faced
XU
XX
Oil Ring: 1.5mm (.059”)
3 piece
oil assembly: Stainless steel flex-
vent spacer, nitrided rails
Oil Ring: 2.8mm (.110”)
3 piece
oil assembly: Stainless steel flex-
vent spacer, nitrided rails
YC
ZV
Oil Ring: 2mm (.079”)
3 piece
oil assembly: Stainless steel flex-
vent spacer, chrome faced rails
Oil Ring: 1.5mm (.059”)
3 piece
oil assembly: Stainless steel flex-
vent spacer, chrome faced rails
No Second Ring
No Second Ring
77mm (3.031”)
96-99mm (3.780 - 3.898”)
0.8mm (.031”)
Alloy steel, phosphate coated,
chrome faced, positive twist
.95mm (.037”)
Alloy steel, gas nitrided,
barrel faced, positive twist
Top Ring:
0.9mm (.035”)
Alloy steel, ferrox coated,
chrome faced
Compression Ring:
0.8mm
(.031”) Ductile Iron, phos-
phate coated, taper faced
Top Ring:
1mm (.039”)
Stainless steel, gas
intrided barrell faced
Compression Ring:
1.2mm
(.047”) Cast Iron, phosphate
coated, taper faced under hook
