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  • Home
  • COMPLETE ENGINES
  • 140cc PIRANHA ENGINE
  • 140cc PIRANHA ENGINE
  • 140cc PIRANHA ENGINE
  • 140cc PIRANHA ENGINE
  • 140cc PIRANHA ENGINE 140cc PIRANHA ENGINE 140cc PIRANHA ENGINE

    140cc PIRANHA ENGINE

    MSRP:
    Now: $659.00
    (You save )

    (12 reviews) Write a Review
    SKU:
    1143A
    UPC:
    1143A
    Width:
    12.00 (in)
    Height:
    12.00 (in)
    Depth:
    2.00 (in)

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    Product Description

    PIRANHA 140cc Engine 


    Comes COMPLETE with:

    • Nibbi 19mm Carburetor
    • Intake Manifold
    • Kick Starter
    • Shifter
    • Ignition Coil
    • Wire Harness
    • CDI
    • 15 Tooth Front Sprocket  
    • Throttle Cable
    • Clutch Cable

    ** REQUIRES 1.5" AIR FILTER FOR 19MM CARB UNI 2 in 1 COMPACT AIR FILTER 1.50"  

    Engine

    Displacement  140cc
    Engine Type  Air Cooled, Single-Cylinder, 2-valve, 4-stroke
    Bore/Stroke  56mm x 57mm
    Final Drive  420 Chain
    Fuel Delivery  OEM 19mm 
    Fuel  Unleaded / 91 Octane
    Recommended Engine Oil  10W-40 Petroleum Based (Non-synthetic)

    Ignition
    Kick Start  Yes
    Electric Start  No
    CDI  Yes
    Auxiliary Output (Lighting)  No

    Transmission
    Transmission 4-Speed MANUAL  4-Up
    Shift-Pattern Four-speed Transmission: N-1-2-3-4
     


    Starting pit bike engines will take some practice. All pit bike engines have relatively high compression ratios and require a "quality over quantity " approach in order to ensure quick start ups and avoid mechanical mishaps. It is important follow this routine the first few times when first attempting to start your bike. 

    1. Slowly kick engine over until the kick start reaches a compression stroke (the point in which the kick start lever is hardest to push down.)
    2. Slowly continue to press the kick starter until the engine rotates slightly through the firmest point in the compression stroke.
    3. Allow the kick start lever to return back its top rest position
    4. With a quick and balanced motion - Move down forcefully on the kick lever. These motors need a strong, quick kick to get started.
    5. If you fail to follow this procedure, especially with longer stroke engines or 125cc + bores you can cause serious damage to your crankcase, clutch and transmissions assemblies!

    Tips to Avoid kickback 

    1. Hold onto the crossbar pad with your throttle hand while kicking the bike over to avoid twisting the throttle open by accident
    2. Before start up - turn the idle screw on the carburetor in a turn or 2 (turn the screw back out to normal idle setting once running.)
    3. Use a digital CDI with variable ignition timing at start-up, this will help reduce kick back and allow the bike to start much easier compared to the stock CDI unit.
    4. If ignition timing is adjustable it should be adjusted to the minimum
    5. Furious, repeated kicking will not get the engine started - firm, full stroke kicks are the only way to get them to start first kick, every time "Quality over Quantity"
    6. Throttle must be completely closed when you kick the engine over or it will kick back EVERY TIME.
    7. A small blip of the throttle maybe used when the engine is hot if required but NO more than 10 ° opening of the throttle in any case

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    140cc PIRANHA ENGINE
    140cc PIRANHA ENGINE

    12 Reviews Hide Reviews Show Reviews

    • 5
      140cc Kit

      Posted by Nate R on Dec 15th 2023

      From the packaging to the machining finishes, this is a quality piece of kit. Looking forward to the adventure planned for this engine in a '69 CL70 we just pulled from the weeds.

    • 5
      The best

      Posted by Pierre on Mar 11th 2022

      I love m'y engine

    • 5
      140/ Xr CRF 70 upgrade

      Posted by Travis Rodriguez on Dec 11th 2020

      YX/Piranha 140 is the best bolt on motor swap you can get for XR 70 and CRF 70. I have both of those bikes and I have tried 88cc with race head, lifan 125 was pretty good also but nothing compared to performance and price of 140. I am a 200 + pound adult and this motor has me ripping around the yard and pulls me like My 12 year old was on it.

    • 5
      YX Piranha 140

      Posted by Travis Rodriguez on Dec 11th 2020

      Motor is a awesome upgrade for my 2003 XR 70 and have 2nd 140cc for CRF 70 This motor puts down 13 HP more or less F yes my 50-70 xr/CRF comrades !

    • 5
      Awesome!

      Posted by Arthur gonzales on Oct 26th 2020

      Awesome motor!

    • 5
      piranha 140cc

      Posted by ryan bowers on Sep 23rd 2020

      very happy with the piranha 140cc fit perfectly in my 71 Honda ct70

    • 5
      140CC PIRANHA ENGINE

      Posted by Rob on Aug 17th 2020

      put engine in a 93 honda 50 runs great, pocket rocket

    • 5
      Piranha 140cc

      Posted by David H Hopkins on Aug 3rd 2020

      I put this on my sons Thumpstar 125cc. The power increase is unbelievable. I recommend using as much of the kit as possible, everything is pretty well matched up. I did have to use my original intake as the one provided moved the carb too far right and interfered with the frame. Definitely pleased with the purchase

    • 5
      Wheelies

      Posted by Spencer Monte on May 15th 2020

      Swapped this into a 125 apollo frame and its a whole new bike. power wheelies.

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