ENGINE
310
body
accessories
handlebar
& grips
cables &
levers
electrical
& ignition
engine
fuel &
intake
clutch
brakes
drive
steering &
suspension
bearings
tires
tools &
shop
exhaust
Manufactured in Italy,
Vertex, the premier
brand of OEM re-
placement pistons, is
the OEM supplier to
KTM and numerous
European motorcycle
and go-kart manufac-
turers. Vertex offers
enthusiasts state-of-
the-art, high-quality
pistons for nearly
any powersport use
from
motorcycles
and ATVs to marine and karting. Manufactured to the highest standards in Japan,
Vertex’s piston rings are produced by the OEM suppliers so that they are direct
OEM replacements. Vertex is the choice of those who truly seek the optimum in
powersport performance in any application
VERTEX PISTON TYPES
• Replica: cast OE replica
• Race: unique cast GP style with only one compression ring
• Pro: forged replacement for a OE cast piston for better strength
• Replica BB: big bore stock compression cast piston
• Pro Replica: forged OE stock compression piston
• Pro BB: forged OE stock compression big bore piston
• Pro Race: unique forged GP style race piston with only one
compression ring
• Pro HC: forged high compression pistons
APP.
YEAR VERSION
DESCRIPTION
COMP.
RATIO
CYL.
BORE
(MM)
PISTON
DIAM.
(MM)
DIS-
PLACE-
MENT
SIZE
OVER
STD
TOP END
REBUILD
KIT
PISTON
KIT RINGS
WRIST
PIN
CIR-
CLIP
GAS GAS
EC 250
02-07 Cast Replica
Replica Piston kit; Kit includes: Piston, rings, pin,
clips
66.4 66.34 250
-----
901970 901103 901034 901682
EC 300
02-13 Cast Replica
Replica piston kit includes: piston, rings, pin,
circlips.
STD 72 71.95 300
-----
901971 901106 901034 -----
HONDA
CR 125R 90-91 Cast Replica
Replica Piston kit; Kit includes: Piston, rings, pin,
clips
STD 54 53.94 125
-----
901136 901581 901009 -----
CR 125R 92-97 Cast Replica
Top end piston kit includes: piston, rings, pin,
circlips, top end gaskets, and wrist pin bearing
when applicable.
STD 54 53.94 125
901983 -----
-----
-----
901680
CR 125R 92-99 Cast Replica
Replica Piston kit; Kit includes: Piston, rings, pin,
clips
STD 54 53.94 125
-----
901139 901581 901009 -----
CR 125R 98-99 Cast Replica
Top end piston kit includes: piston, rings, pin,
circlips, top end gaskets, and wrist pin bearing
when applicable.
STD 54 53.94 125
901984 -----
-----
-----
-----
CR 125R 00-02 Cast Replica
Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and wrist pin bearing
when applicable.
STD 54 53.94 125
901985 -----
-----
-----
901680
CR 125R 00-03 Cast Replica
Replica Piston kit; Kit includes: Piston, rings, pin,
clips
STD 54 53.94 125
-----
901184 901581 901009 901680
CR 125R 03 Cast Replica
Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and wrist pin bearing
when applicable.
STD 54 53.94 125
901981 -----
-----
-----
-----
CR 125R 04 Cast Replica
Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and wrist pin bearing
when applicable.
54 53.93 125
901982 -----
-----
-----
901680
CR 125R 04 Cast Replica
Replica Piston kit; Kit includes: Piston, rings, pin,
clips
54 53.93 125
-----
901268 901581 901009 901680
CR 125R 04-07 Cast Race
Performance Piston kit; Kit includes: Piston,
rings, pin, clips
54 53.93 125
-----
901269 901581 901009 901680
CR 125R 04-07 Forged Big Bore Big Bore Piston kit; +3mm makes 139cc. Kit
includes: Piston, rings, pin, clips
57 56.95 139
3
-----
901972 901101 901009 -----
CR 125R 05-07 Cast Replica
Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and wrist pin bearing
when applicable.
STD 54 53.94 125
901986 -----
-----
-----
901680
CR 125R 05-07 Cast Replica
Replica Piston kit; Kit includes: Piston, rings, pin,
clips
STD 54 53.94 125
-----
901301 901581 901009 901682
CR 250R 89-94 Cast Replica
Replica Piston kit; Kit includes: Piston, rings, pin,
clips
STD 66.4 66.35 250
-----
901137 901103 901034 901682
CR 250R 95-96 Cast Replica
Replica Piston kit; Kit includes: Piston, rings, pin,
clips
STD 66.4 66.35 250
-----
901157 901103 901034 -----
CR 250R 97-01 Cast Replica
Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and wrist pin bearing
when applicable.
STD 66.4 66.35 250
901987 -----
-----
-----
901682
CR 250R 97-01 Cast Replica
Replica Piston kit; Kit includes: Piston, rings, pin,
clips
STD 66.4 66.35 250
-----
901174 901103 901034 -----
CR 250R 02-04 Cast Replica
Top end piston kit includes: piston, rings, pins,
circlips, top end gaskets, and wrist pin bearing
when applicable.
STD 66.4 66.35 250
901988 -----
-----
-----
901682
