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The heart of your motorcycle is the bike engine. Inject your ride with power, whether updating a pit scooter or a quad bike. Brands like Honda, Demon X, and Lifan give your motorcycle a new lease on life with a 140cc design.

Modernising a vintage bike or reworking a newer one begins with the bike engine, and the right one not only improves performance but reduces vibration, speeds up combustion, and adds horsepower for a smooth, fast ride.

  • New BD125cc 4 Speed Manual Pit Bike Engine. Full Package 18mm. GN125

    New BD125cc 4 Speed Manual Pit Bike Engine. Full Package 18mm. GN125

    Full package inc carb, air filter & full wiring loom.
    £199.99
    Buy it now
    Free P&P
    • 81 watching
    • |
    • 17 sold
    New BD125cc 4 Speed Manual Pit Bike Engine. SAME MAKE OF ENGINE AS USED IN THE STOMP AND DEMON X BIKES (110cc) ITS AN MANUAL CLUTCH ENGINE. IT WILL BE SUPPLIED WITH GEAR LEVER, KICK START, 18mm CARB, ...
  • New Lifan 125cc Big Valve Head 4 Speed Manual Pit Bike Engine Full Package

    New Lifan 125cc Big Valve Head 4 Speed Manual Pit Bike Engine Full Package

    Full package inc Mikuni VM22, Full wiring loom.
    £228.00
    Buy it now
    Free P&P
    • 159 watching
    • |
    • 44 sold
    THESE ENGINES ARE 445mm LONG, 280mm WIDE. TOP MOUNTING IS 93mm WIDE WITH A 8mm BOLT HOLE, REAR MOUNTING IS 82mm WIDE WITH A 8mm HOLE. THEY ALSO HAS THE 4 M8 THREADED HOLES ON THE UNDERSIDE WHICH ARE 8...
  • New Lifan 110cc 4 Speed Manual Pit Bike Engine & Complete Wiring Loom

    New Lifan 110cc 4 Speed Manual Pit Bike Engine & Complete Wiring Loom

    Simply Add Your Carburettor & Cables & Go.
    £187.50
    Buy it now
    Free P&P
    • 29 watching
    • |
    • 5 sold
    THESE ENGINES ARE 440mm LONG, 280mm WIDE. TOP MOUNTING IS 93mm WIDE WITH A 8mm BOLT HOLE, REAR MOUNTING IS 82mm WIDE WITH A 8mm HOLE. THEY ALSO HAS THE 4 M8 THREADED HOLES ON THE UNDERSIDE WHICH ARE 8...
  • Molkt 26mm Carb & Filter For 140cc Pit Bike Engines YX140

    Molkt 26mm Carb & Filter For 140cc Pit Bike Engines YX140

    £25.75
    Buy it now
    Free P&P
    • 100 watching
    • |
    • 178 sold
    New Molkt carb with air filter. This kit is for the YX140cc engines. These carbs do perform very well & the most commonly used. We provide an extensive range of parts matched with competitive prices a...
  • YX140cc Z40 Pit Bike Engine & Complete Wiring Loom. 16 Bhp.

    YX140cc Z40 Pit Bike Engine & Complete Wiring Loom. 16 Bhp.

    As Used In Stomp, Demon X, M2R With Z40 Cam
    £289.00
    Buy it now
    Free P&P
    • 72 watching
    • |
    • 15 sold
    16 Bhp. The engine will be supplied with 16mm kick start, folding gear lever,front sprocket, complete wiring loom with components to run the engine, inlet manifold with gaskets, front sprocket. You wi...