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Piranha - 140cc Bottom Electric Start Semi-Auto E-Start Engine

Vital Information
Part No WHS-3284
Stock Level 7 Left
Choose Options

This is the newest offering from Piranha! The same great, dependable YX 140cc motor with an electric start option and a semi-automatic transmission. Starter motor mounted on bottom.


  • This engine has difficulty being put into a Motoped due to pedal clearance issues.
  • If running TRC-4958 pegmount, please see "recommended" below
  • Replacement starter motor WHS-0394 (2 bolt style)
  • The engine is slightly wider in the lower rear and may cause clearance issues with over the top brake pedals such as on the SSR SR125

Engine Kit Includes:

  • Engine
  • Intake
  • CDI
  • Coil
  • Harness
  • Kicker
  • Shifter
  • Carburetor
  • Wiring kit - WHS-4179
  • Solenoid
  • Voltage regulator


  • TRC-4958 - Pegmount
  • AS75-16-32 - Pegmount spacers and bolts

Note: We suggest using an aftermarket exhaust to obtain maximum performance.

Recommended for your application:

Honda XR50/CRF50:

  • CRF50/XR50 tank spacer kit - TRC-1955
  • Throttle cable - TBW0301
Honda XR70/CRF70:

  • Throttle cable - TBW0301
Honda CT70:

  • Dual feed petcock for ATC70 CT70 Z50 - TBW0133
Honda Z50:

  • TBparts race petcock for Z50 69-78 - TBW0355
  • TBparts 12 way rotating spacer 26mm - TBW1487

Honda ATC70:

  • Dual feed petcock - TBW0133

Not Included:

  • Skid plates
  • Exhaust
  • Air filter
  • Throttle cable


Engine TypeAir Cooled, Single-Cylinder, 2-valve, 4-stroke
Bore/Stroke56mm x 57mm
Final DriveChain
Fuel DeliveryNibbi 19mm
FuelUnleaded / 91 Octane
Recommended Engine Oil10W-40 Petroleum Based (Nonsynthetic)
Kick StartYes - 14mm type
Electric StartYes
Auxiliary Output (lighting)Yes
Transmission4-Speed semi-auto
Shift-PatternFour-speed Transmission: N-1-2-3-4

Available Options:

Exhaust Gasket:


Uni Air Filter:

(2 Reviews)

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We have all necessary support parts on hand.

Most orders ship same, or next business day, unless otherwise noted above.