ENGINE
HIGH-PERFORMANCE PISTONS
  • Forged from high-silicon aluminum alloy for maximum strength
  • and dependability
  • Wiseco offers a complete range of popular piston models and years for
  • both trail and racing applications
    FORMULA FOR COMPUTING CUBIC CENTIMETER DISPLACEMENT
    D = Bore Size in Inches; S = Stroke in Inches; Number = Number of Cylinders
    D(2) x .7854 x S x N x 16.387 = CC Displacement
    WISECO FEATURES PRO-LITE PISTONS
  • Durability, longevity and increased horsepower
  • Innovative forging design and piston skirt provide maximum horsepower
  • and torque
    WRIST PINS
    PK PISTON AND GASKET KITS
  • Wiseco wrist pins are strong, lightweight
  • Contain all the necessary components for overboring or rebuilding your top end
  • and can be used with OEM pistons, too
  • Feature forged pistons, rings, wrist pins, circlips and top end gasket set
  • Wiseco 2-stroke pistons include a wrist pin
  • Cylinder sleeves must be purchased separately
  • unless indicated
  • See price list on pages 814-815
  • See price list on pages 814-815
  • WISECO PISTON PRICING
    TOP END BEARINGS
  • All Wiseco High-Performance Motorcycle Pistons are priced with rings and circlips;
  • High-quality bearings are manufactured to
  • see price list on pages 814-815
    the highest standards; case-hardened for
    4-STROKE RACER’S CHOICE PISTONS
    maximum life and smooth operation at high
    engine speeds
  • Now you can own the same race parts as all the top race teams
  • See price list on pages 814-815
  • These high-tech piston designs offer maximum compression ratios, ultra-stiff strutted
  • forgings, and titanium nitride-coated rings, which all add up to more power that is
    sustained longer
    CIRCLIPS
  • When blow-by starts to increase on other pistons and power starts to fade, Wiseco
  • Two high-strength, easy-to-install circlips
  • Race Series parts continue sealing and performing
    furnished with every piston
    NOTE: Service intervals may be increased with Racer’s Choice pistons over conventional Wiseco
  • Order additional inventory from the chart
  • pistons, and are for expert racers and tuners only.
    on page 815
  • See price list on pages 814-815
  • 2-STROKE GP SERIES PISTONS
  • Have additional features over standard Pro-Lite parts
  • REPLACEMENT
  • Each piston is E-Coated on the crown, ring grooves, and pin bore, for maximum wear
  • resistance and protection from micro-welding, galling, and detonation
    RING SETS
  • GP Series parts generally have less machining on the outside, which helps seal up the
  • Each ring set is for one piston
  • bore for increased compression
  • See Wiseco ring buyer’s guide for details
  • Additionally, boost ports are removed for a more predictable powerband and
  • See price list on pages 814-815
  • increased pull on the top end
    NOTE: Wiseco rings fit only Wiseco pistons.
    OVER
    REPL.
    BORE (MM)
    DISPL. BORE
    SIZES PK KIT
    PISTON
    REPL. RING CIRCLIPS
    REPL. WRIST
    TOP-END
    FITS MODEL
    X STROKE (MM) (CC)
    SIZE (MM) (MM) PART #
    PART #
    SET PART # PART #
    PIN PART #
    BEARING PART #
    ATK/ ROTAX
    250 96-01
    67.5
    250
    67.5
    STD
    -
    0910-2872
    2658CD
    CW18
    S-477
    -
    x
    -
    -
    -
    -
    -
    -
    69.8
    -
    -
    -
    -
    -
    -
    GAS GAS 2-STROKE
    EC 125 00-11, MC125 00-11
    54
    125
    54.0
    STD
    -
    0910-0729
    2126CS
    CW15
    -
    -
    Racer’s Choice GP Style
    x
    134
    56.0
    2.0
    -
    0910-0730
    2205CS
    -
    -
    -
    Electra Coated
    54.5
    -
    -
    -
    -
    -
    -
    *Nikasil Bore – Cylinder sleeving or
    replating required for oversizes
    -
    -
    -
    -
    -
    -
    EC200 00-14
    62.5
    199
    62.5
    STD
    -
    0910-2879
    2461CD
    CW18
    S-477
    -
    EC200R 14-17
    x
    -
    -
    -
    -
    -
    -
    65
    -
    -
    -
    -
    -
    -
    EC 250R 14-17, EC 250 97-14,
    66.4
    249
    66.4
    STD
    -
    0910-1698
    2614CD
    CW18
    S-508
    -
    SM 250 97-08, MC 250 97-08
    x
    -
    -
    -
    -
    -
    -
    72
    -
    -
    -
    -
    -
    -
    EC 300R 14-17, EC300 00-14
    72
    293
    72
    STD
    -
    0910-1699
    2835CD
    CW18
    S-508
    -
    x
    -
    -
    -
    -
    -
    -
    72
    -
    -
    -
    -
    -
    -
    GAS GAS 4-STROKE
    EC 250F 10-15
    77
    250
    77.0
    STD
    0903-0559 0910-0808
    -
    CW16
    0913-0008
    -
    12.5:1 Compression
    x
    263
    79.0
    2.00
    -
    -
    3110XG
    -
    -
    -
    Nikasil Bore-Cylinder sleeving
    53.6
    -
    -
    -
    -
    -
    -
    or replating required for oversizes
    -
    -
    -
    -
    -
    -
    EC 250F 10-15
    77
    250
    77.0
    STD
    0903-0558 0910-0810
    0912-0140
    CW16
    0913-0008
    -
    13.5:1 Compression
    x
    263
    79.0
    2.00
    -
    -
    3110XG
    -
    -
    -
    ArmorGlide skirt coated
    53.6
    -
    -
    -
    -
    -
    -
    2 Ring. Race Only. Nikasil Bore-Cylinder
    -
    -
    -
    -
    -
    -
    sleeving or replating required for oversizes
    -
    -
    -
    -
    -
    -
    HIGH-PERFORMANCE PISTONS continued on next page.
    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.
    2018 PARTS UNLIMITED OFFROAD