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ESP Ported Zenoah G340RC 34.02cc 4-Bolt Engine

$574.00 to $579.00
SKU: BB133


ESP Ported Zenoah G340RC 34.02cc 4-Bolt Engine Payment Required with PayPal


ESP (Earth Surfer Products) Modified AND Race Ported Zenoah G340RC 4-Bolt Engine - Complete with Clutch Available in 2 options

This engine has been Race Ported and Modified. This changes the original crankshaft with one that is 2mm longer in stroke. This increases total displacement and torque. The cylinder also has reshaped exhaust, intake and transfer ports. This increases peak horsepower and peak RPMs. This is ESP's most powerful engine. Based on the brand new design released in 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.

Very important:

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

BB133C - This is the factory version of the clutch housing as it comes from Zenoah. This option fits HPI Baja 5B/5T/5SC, Kraken Vekta.5, Helicopter, clutch driven Go-ped scooters, etc. This is the version that will work properly for most applications. The Losi 5IVE-T 2.0 and Desert Buggy XL 2.0 will also this model of engine. You will need to use the Factory Losi modified clutch housing (LOS252093). You do not need to use the CY fan cover or clutch plate for the 2.0 models.

BB133D - 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-T 1.0/RTR, Losi Desert Buggy XL 1.0 (DBXL), and Redcat. A CY fan cover must also be used for this engine to fit a Losi 5ive, Losi DBXL or Redcat. This is the stock fan cover from your Losi 5ive, Losi DBXL or Redcat. We also have these fan covers available for purchase separately (see item EG411), also at the bottom of this page in the related items. 

Nearly all  Losi/TLR clutch bell set ups also require you to use the CY Clutch plate (see item GT244) and clutch plate bolt (GT249) because the Zenoah clutch plate pushes the clutch shoes too far out. Note: Aftermarket Billet aluminum clutch housings are available for the HPI Baja 5B/5T/5SC (see part number GT396) and Losi 5ive/DBXL & Redcat. (see part number SM106SV).
Here is a YouTube video that helps explain the clutch options:

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

You can download a copy of the owners manual here:

You can download a copy of the Official Zenoah Product release here:

Stock replacement parts for this motor are available here:





Fits most all the same applications as the regular Zenoah R/C Engines:
HPI Baja 5B/5T/5SC, Losi 5IVE-T, TLR 5IVE-B, Kraken VEKTA, Losi Desert Buggy XL (DBXL)/MTXL, Redcat, Go-Ped Scooters (clutch driven versions only), Helicopters, and more!

For Go-Ped use - This engine will bolt on and work on existing 54mm clutch models. Will work on spindle drive models only if ADA clutch is used (part GT201).

This is a complete engine - including carburetor, air filter, clutch, and muffler. In many applications including in most RC cars you will remove the factory Zenoah exhaust muffler and air filter to use the exhaust and air filter that came with your model. The factory Zenoah air filters are not made for extremely dirty or dusty environments.

If you need a replacement modified cylinder set for this engine that listing is here: ESP Modified and Race Ported top end kt for Zenoah 34.02cc

With the modified and ported cylinder, crankcase and long stroke crankshaft you can increase power output with a few options:

Upgraded transfer port covers. These can be used with the factory Zenoah cylinder as well as any ported or modified cylinders. Bartolone Racing and Turtle Racing/OBR offer some that can be seen here: Bartolone Covers and TR/OBR Covers


What is the same as the existing Zenoah RC (G230-G290RC) 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
  • Ring
  • Piston 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


  • Cylinder displacement 34.02 cm³
  • Cylinder bore 38 mm
  • Cylinder stroke 30 mm
  • Start system Recoil starter
  • Spark plug NGK CMR7H
  • Carburetor Walbro WT-1107
  • Product size length 16.7 cm
  • Product size width 21.5 cm
  • Product size height 19.6 cm
  • Fuel: Pre-mixed gasoline and 2-cycle oil, 25:1 ratio