ENGINE
TOP END PISTON KITS (CONT)
FITS MODEL
COMPRESSION RATIO
CYLINDER BORE (MM)
PISTON DIAMETER
DISPL (MM)
PISTON VERSION
TOP END KIT PART #
SUG. RETAIL
YAMAHA
13.5:1
77.00
76.95
250
Forged Replica
0910-3757
$253.95
13.5:1
77.00
76.96
250
Forged Replica
0910-3758
253.95
13.5:1
77.00
76.97
250
Forged Replica
0910-3759
253.95
WR450F 03-06
12.5:1
95.00
94.93
450
Forged Replica
0910-3715
307.95
12.5:1
95.00
94.95
450
Forged Replica
0910-3719
307.95
12.5:1
95.00
94.93
450
Forged Replica
0910-3716
301.95
12.5:1
95.00
94.94
450
Forged Replica
0910-3718
301.95
12.5:1
95.00
94.95
450
Forged Replica
0910-3720
301.95
12.5:1
95.00
94.93
450
Forged Replica
0910-3715
307.95
12.5:1
95.00
94.94
450
Forged Replica
0910-3717
307.95
12.5:1
95.00
94.95
450
Forged Replica
0910-3719
307.95
YZ450F 06-09
12.5:1
95.00
94.94
450
Forged Replica
0910-3718
301.95
12.5:1
95.00
94.95
450
Forged Replica
0910-3720
301.95
12.5:1
97.00
96.93
450
Forged Replica
0910-3778
312.95
12.5:1
97.00
96.94
450
Forged Replica
0910-3779
312.95
12.5:1
97.00
96.95
450
Forged Replica
0910-3780
312.95
13.5:1
97.00
96.93
450
Forged High Comp
0910-3781
326.95
13.5:1
97.00
96.94
450
Forged High Comp
0910-3782
326.95
13.5:1
97.00
96.95
450
Forged High Comp
0910-3783
326.95
0910-0976
0910-1062
0910-1045
PISTON KITS, RINGS, WRIST PINS AND CIRCLIPS
  • All pistons are heat-treated with a T-5 hardening and tempering cycle
  • All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life
  • Forged High Compression pistons improve power and torque across entire rpm range
  • Big Bore pistons increase engine’s displacement, torque, and peak horsepower
  • Forged Replica pistons are forged OE replacements
  • Kits include piston, rings, wrist pin and circlips
  • Replacement two-stroke piston rings sold individually; four-stroke piston rings sold as a set
  • PISTON VERSIONS
    Cast Race – Unique cast GP style race piston with only one compression ring
    Cast Big Bore – Big bore stock compression cast piston
    Forged Replica – Forged OE stock compression piston
    Forged Race – Unique forged GP style race piston with only one compression ring
    Forged High Comp – Forged high compression pistons
    DIAMETER PISTON
    PISTON KIT RING SET
    WRIST PIN CIRCLIP
    DIAMETER PISTON
    PISTON KIT RING SET
    WRIST PIN CIRCLIP
    FITS MODEL
    (MM)
    VERSION
    PART #
    PART #
    PART #
    PART #
    FITS MODEL
    (MM)
    VERSION
    PART #
    PART #
    PART #
    PART #
    COBRA
    HONDA (CONT)
    CX50 JR/SR 06-15
    Cast Replica
    0910-4134 -
    -
    -
    CR125R 00-03
    53.94
    Cast Replica
    0910-1028 0912-0170 0913-0019 0913-0054
    Cast Replica
    0910-4135 -
    -
    -
    CR125R 04
    53.93
    Cast Replica
    0910-2034 0912-0170 0913-0019 0913-0054
    Cast Replica
    0910-4136 -
    -
    -
    CR125R 04-07
    53.93
    Cast Race
    0910-2127 0912-0170 0913-0019 0913-0054
    Cast Replica
    0910-4139 -
    -
    -
    CR125R 05-07
    53.94
    Cast Replica
    0910-1029 0912-0170 0913-0019 0913-0054
    Cast Replica
    0910-4140 -
    -
    -
    CR125R 04-07 (+3mm
    CX 65 12-15
    Cast Replica
    0910-4137 -
    -
    -
    144cc Big Bore)
    56.95
    Forged Big Bore
    0910-2554 0912-0172 0913-0019 0913-0054
    Cast Replica
    0910-4138 -
    -
    -
    CR125R 04-07 (+3mm
    144cc Big Bore)
    56.95
    Forged Race
    -
    0912-0172 0913-0045 0913-0054
    66.34
    Cast Replica
    0910-2553 0912-0175 0913-0038 0913-0056
    CRF150R/RB 12-16
    65.97
    Forged Replica
    0910-1041 0912-0207 0913-0029 0913-0061
    EC300 02-13
    71.95
    Cast Replica
    0910-3186 0912-0177 0913-0038 0913-0056
    65.98
    Forged Replica
    0910-1743 0912-0207 0913-0029 0913-0061
    HONDA
    65.99
    Forged Replica
    0910-1744 0912-0207 0913-0029 0913-0061
    CR80R 90-02
    46.95
    Cast Replica
    0910-1023 0912-0163 0913-0027 0913-0048
    CRF150R/RB 07-09,
    65.97
    Forged High Comp 0910-1042 0912-0207 0913-0029 0913-0061
    47.45
    Cast Replica
    0910-1024 0912-0166 0913-0027 0913-0048
    12-16 (high
    65.98
    Forged High Comp 0910-1745 0912-0207 0913-0029 0913-0061
    compression 12.2:1) 65.99
    Forged High Comp 0910-1746 0912-0207 0913-0029 0913-0061
    (+2mm Big Bore)
    49.45
    Forged Big Bore
    0910-1025 0912-0201 0913-0027 0913-0048
    CR125R 90-91
    53.94
    Cast Replica
    0910-1026 0912-0170 0913-0019 0913-0054
    CR125R 92-99
    53.94
    Cast Replica
    0910-1027 0912-0170 0913-0019 0913-0054
    DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES.
    SEE PAGE 4 FOR IMPORTANT EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND WARRANTY INFORMATION.
    2017 PARTS UNLIMITED OFFROAD