ENGINE
0903-1124
0910-3676
0925-0893
170 CC BIG BORE KIT
FOR HONDA GROM 14-15
  • Includes ceramic coated cylinder, 61mm forged piston, rings, pin,
  • gasket kit and banjo bolts
    0934-3478
  • Compression ratio of 11.5 to 1
  • Optional camshaft kit can be used with stock engine, but delivers
  • improved results when used with 170cc Big Bore kit
    0932-0105
    DESCRIPTION
    P ART  #
    SUG. RETAIL
    DESCRIPTION
    P ART  #
    SUG. RETAIL
    170cc Big Bore kit
    0903-1124
    $344.95
    Banjo bolt kit
    0932-0105
    $14.95
    61mm forged piston kit
    0910-3676
    99.95
    Gasket kit
    0934-3478
    29.95
    Camshaft
    0925-0893
    129.95
    4V HEAD KIT
    FOR HONDA GROM 14-15
  • Ideal engine part to complete Koso’s big bore kit
  • Unique four-valve design increases air flow and performance
  • 0950-0754
  • Provides more power and torque
  • Features a forged piston, stainless steel 24mm intake valves and 20mm exhaust valves
  • DESCRIPTION
    P ART  #
    SUG. RETAIL
    DESCRIPTION
    P ART  #
    SUG. RETAIL
    4V head kit with 170cc Big Bore Kit
    0950-0754
    $949.95
    4V head kit only
    0950-0755
    $689.95
    HIGH-FLOW OIL PUMP
    FOR HONDA GROM
  • Increases the oil flow by 40%, helping to prevent engine failure
  • Keeps the engine lubricated to optimize performance
  • Recommended for bikes with upgraded engines using the Koso North
  • America 170cc Big Bore kit and 4V cylinder head (sold separately;
    see above)
    SUG. RETAIL ............................................................... $48.95 PART #
    0932-0167
    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