ENGINE
0903-0617
HYPER RACE KITS
  • Complete 70cc cylinder kits
  • Kits feature a new cylinder head design, lighter flat-head piston and
  • special porting to increase power
  • Race crankshaft is made of special steel that is machine-forged for
  • added strength and features a 12mm wrist pin
  • Lighter connecting rods have full rounds and special needle bearings to
  • reduce crankshaft volume
  • Full exhaust system included
  • Center stand must be removed when race pipe is installed
  • Included 19mm Dell’ Orto carburetor provides optimal airflow to match
  • the increase in engine performance
  • All necessary gaskets included
  • Replacement piston kits sold separately
  • FITS MODEL
    P ART  #
    SUG. RETAIL
    FITS MODEL
    P ART  #
    SUG. RETAIL
    COMPLETE KITS
    REPLACEMENT PARTS AND ACCESSORIES (CONT)
    YAMAHA
    Repl. race exhaust for P ART #0903-0616
    1820-0946
    $376.95
    Jog/ Vino/ Zuma 02-05 (horizontal engine) race kit
    0903-0617
    $1,019.95
    Repl. race exhaust for P ART #0903-0617
    1820-0945
    363.95
    REPLACEMENT PARTS AND ACCESSORIES
    Repl. 19mm Dell ‘Orto carburetor for all kits
    1002-0031
    209.95
    Repl. piston kit for P ART #0903-0616
    0910-1121
    65.95
    Repl. throttle cable
    0650-1034
    25.95
    Repl. piston kit for P ART #0903-0617
    0910-1122
    65.95
    0921-0019
    0931-0076
    0931-0077
    70CC BOLT-ON BIG BORE CYLINDER KITS
    0910-0581
    FOR SCOOTERS
  • Kits come complete with aluminum cylinder (with a nickel carbide-plated 47.66mm bore), cylinder head, piston assembly (piston, rings, 10mm wrist
  • pin and circlips), carbon reeds and all required top-end gaskets
  • Optional high-performance crankshafts (sold separately) replace OEM and are manufactured to Athena’s highest standards
  • Replacement top-end gasket kits and piston kits also available separately
  • NOTE: It is recommended that Athena’s 17.5mm or 19mm Scooter carburetor be used with these bolt-on big bore kits. See FUEL/AIR SYSTEMS section.
    FITS MODEL
    BIG BORE KIT
    SUG. RETAIL
    CRANKSHAFT
    SUG. RETAIL
    REPLACEMENT TOP-END GASKET KIT SUG. RETAIL
    MALAGUTI
    F10 (air cooled)
    0931-0077
    $197.85
    0921-0020
    $161.95
    0934-0639
    $8.95
    F15/ Italjet Dragster (liquid cooled)
    -
    -
    0921-0020
    161.95
    0934-0640
    12.95
    YAMAHA
    BW/ Zuma1 98-01 (vertical engine)
    0931-0076
    197.85
    0921-0019
    161.95
    0934-0638
    8.95
    Vino 50/ Jog/ Zuma2 02-05 (horizontal engine)
    0931-0077
    197.85
    0921-0020
    161.95
    0934-0639
    8.95
    REPLACEMENT PISTON KITS
    REPLACEMENT REEDS
    (FOR ALL SCOOTER MODELS LISTED ABOVE)
    DESCRIPTION
    P ART  #
    SUG. RETAIL
    SIZE
    P ART  #
    SUG. RETAIL
    Repl. reeds for P ART #0931-0077
    1008-0280
    $10.95
    Std.
    0910-0581
    $46.95
    Repl. reeds for P ART #0931-0076
    1008-0281
    13.95
    + .01mm
    0910-0582
    46.95
    WRIST PIN BUSHINGS
  • Machined from solid proprietary bronze alloy bar stock with an
  • exceptional Rockwell hardness rating
  • Highest-quality wrist pin bushing available
  • 0923-0377
  • Sold each
  • HIGH GEAR BUSHINGS
  • 0.814” OD x 0.688” ID; 1.031” overall length
  • Made in the U.S.A.
  • FOR TRIUMPH 650 63-72
    FITS MODEL
    DESCRIPTION
    P ART  #
    SUG. RETAIL
  • Replace single, OEM-style bushing
  • BMW
  • Maintain bearing surface while the gap between each
  • /5/6/7/ R80/ R90/ R100 70-95
    .952 OD x .856” ID; .935 overall length
    0923-0377
    $28.95
    bushing provides a large cavity for oil to pool, aiding in
    TRIUMPH
    lubrication of the shaft
    650/ 750 63-83
    .814” OD x .688” ID; 1.031” overall length 0923-0318
    16.95
    SUG. RETAIL ..... $24.95 PART #
    0926-2854
    DISCLAIMER: NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES.
    SEE PAGE 6 FOR IMPORTANT EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND WARRANTY INFORMATION.
    2018 PARTS UNLIMITED STREET