Zenoah G320RC 31.8cc 4-Bolt Engine - Factory Housing (HPI Fitment)

Brand: DDM Racing

Part Number: DDM-BB125C

£366.28 Web Price RRP £399.00

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Brand new for 2014, the Zenoah G320RC 31.8cc 4-Bolt Engine. All new design - redesigned cylinder, crankcase, crankshaft, piston, etc for an absolute explosion of power, yet still in the same size package as the original Zenoah RC engines (G230RC, G240RC, G260RC, G270RC, G290RC)

This Zenoah G320RC engine has a 38mm bore, and 28mm stroke, for 31.8cc in its stock form. Includes a revolutionary new cylinder design with closed deck transfer ports (two piece), with removable covers.

The release of this Zenoah G320RC engine is the biggest news to hit the R/C engine world in years! We have been testing this engine for the last few months, and the power output is incredible. 

This engines outer clutch housing is available in 2 versions. When ordering, select the clutch housing option you need from the drop-down menu.

BB125C - This is the factory version of the motor - comes exactly as manufactured by the Zenoah factory, with no modifications. Fits HPI Baja 5B/5T/5SC, Helicopter, Go-Ped, etc. This is the version that will work properly for most applications.

BB125D - This version of the engine has a modified shorty clutch housing - For R/C cars that were originally designed specifically for CY engines, which have less total engine width. Fits Losi 5ive, Losi Desert Buggy XL (DBXL), and Redcat. A CY fan cover must also be used for this engine to fit a Losi/Redcat. This is the stock fan cover from your Losi/Redcat. 


This engine is not compatible with most FG Modellsport or Smartech models. The larger crankcase interferes with the input shaft into the transmission.

What is the same as the existing Zenoah R/C engines:

  • Pull Starter
  • Fan Cover
  • Ignition Coil 
  • Flywheel
  • Inner Clutch Parts
  • Spark Plug
  • Carburetor Gasket
  • Exhaust Gasket
  • Muffler
  • Air Filter
  • Small Oil Seal

What is different:

  • Cylinder
  • Piston
  • RingPiston Pin, Bearing, Washers
  • Crankcase
  • Crankshaft
  • Crankcase Bearings
  • Outer Clutch Case
  • Engine Cover (shroud)
  • Crankcase Gasket
  • Insulator Gasket
  • Cylinder Gasket
  • Piston Pin, C-Clips, Washers, Bearing, etc
  • Insulator Manifold
  • Carburetor Large Oil Seal


  • Displacement: 31.8cc
  • Bore: 38mm
  • Stroke: 28mm
  • Dry Weight: 2.3kg HP: Approx 3.5 or more (before adding tuned exhaust). The G290RC is commonly listed at 3.5hp, but this engine puts out considerably more power than the G290RC. Adding a tuned exhaust or other modifications will further increase horsepower and torque numbers.
  • Overall Dimension: 164mm Length, 215mm Width, 196mm height
  • Fuel: Pre-mixed gasoline and 2-cycle oil, 25:1 ratio

Fits most all the same applications as the regular Zenoah R/C Engines:
HPI Baja 5B/5T/5SC, Losi 5ive, Losi Desert Buggy XL (DBXL), Redcat, Go-Ped(clutch driven versions only), Helicopter, and more!
For Go-Ped use - This engine will bolt on and work on existing 54mm clutch models. 

This is a complete engine - including carburetor, air filter, clutch, and muffler.

  • Brand: DDM Racing
  • Part No: DDM-BB125C
  • Displacement: 26cc+
  • Fitment: Option Part
  • Starter: Pull Start

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