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Pitster Pro 140cc SEMI AUTO BLACK Engine
fits Pit Bikes and other Minis

Vital Information
Part No PP-11309
Stock Level In Stock
Choose Options

Pitster Pro 140cc SEMI AUTO Engine with Electric start

This is a YX 140cc engine

This is the most current version available and all most current improvements.
We have had excellent results and great customer feedback on this engine.  

Now with 23/27 Big Valve Head

Front Drive Sprocket Included

Displacement 140cc
Engine Type Air Cooled, Single-Cylinder, 2-valve, 4-stroke
Bore/Stroke 56mm x 57mm
Final Drive Chain
Fuel Delivery  OEM Carb 
Fuel Unleaded / 91 Octane
Recommended Engine Oil 10W-40 Petroleum Based (Nonsynthetic)
Kick Start Yes
Electric Start Yes
Auxiliary Output Yes
Transmission 4-Speed  4Up
Shift-Pattern Four-speed Transmission: N-1-2-3-4

Engine Specs

Bore: 56mm

Stroke: 57mm

Displacement : 140.4cc

Gears: 4 speed ,bottom neutral 4 up shifting

Carb: 22mm

Ignition: CDI 

Kit Includes

  • Kicker starter
  • Shifter
  • stator
  • wiring harness
  • cdi
  • coil
  • Oil Cooler & lines
  • 22mm carb (NO AIR FILTER)

Not Included

Skid plates


Air filter

Pitster Pro is the maker of all GPX engines

GPX engines sold here will carry the GPX or PP logo on both sides


When upgrading your Honda XR50/70 ,CRF50/70 to this engine you
may want to use order aftermarket footpeg mounts and tank spacers.

Also we suggest using an aftermarket exhaust to obtain maximum performance

All of these items are available at TBoltUSA.com

Available Options:


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Since 2004, every purchase from TBolt USA includes access to technical support from our staff of experts and our online Pit Bike Technical Info Database!

We have all necessary support parts on hand.

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


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