ProTek RC Euro LS-5 .21 Long Stroke 5-Port Competition Off-Road Engine (Pre-Run) (Turbo Plug)

ProTek RC
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The ProTek R/C Euro LS-5 is a 5-port long stroke .21 nitro engine perfect for 1/8 buggy, and great for 1/8 truck. It features a lightweight aluminum R7 conrod, 5 transfer ports, larger bore intake crankshaft, high efficiency large cooling head and a heat-resistant slide carburetor with standard venturi compatibility.

On the power end, the LS-5 produces smooth linear power to ensure fuel efficiency is maximized and your tires and dirt work as one. The LS-5 has another side to it though, producing explosive dirt-spraying bottom end torque, all at a triggers notice.

For a "budget friendly" engine, the LS-5 is the perfect option for all your racing and bashing needs. If you need quality, consistent results, and high performance - without breaking the bank - pick up the the ProTek R/C Euro LS-5.

LS-5 Certified Pre-Run
LS-5 Certified Pre-Run Engines are brand new engines that have been fired-up and run by a trained professional. The engines are bench run for a period of time to assist in the break-in process, as well as to check for any mechanical flaws or running issues. Once finished, each engine receives a new C6TGC glow plug and engine data (such as RPM) are recorded and documented on the included certificate. Note: Although the engines are pre-run, they are not ready for a race tune. It is recommended to run 2-3 tanks through your pre-run engine before leaning it out for a race tune. 




  • Certified Pre-Run
  • Large efficient cooling head
  • Explosive bottom-end power
  • Smooth and linear power band
  • 5 Transfer port design
  • Long stroke
  • Steel bearings
  • Goes braaap!

Recommended Tuned Pipe Manifold: EFRA 9901 with 41021 Manifold
Recommended Glow Plug: Novarossi CT0 #6

Displacement: 3.49cc.
Bore x Stroke: 16.26mm x 16.80mm
Transfer Ports: 5
RPM (Max Power): 34,000
RPM (Practical Range): 6,000 - 36,200
Rear Ball Bearing Type: 25.8mm Steel
Crankshaft Type: 14mm SG
Carburetor Type: 8mm Slide
Material: Plastic
Adjustment: Single
Glowplug Type: Turbo - CT0 #6
Exhaust Position: Rear 


  • (1) Euro LS-5 Pre-Run Off-Road Engine
  • (1) CT0 #6 Turbo Glow Plug
  • (1) High Temp Exhaust Gasket
  • (1) Venturi Set (5.4, 6.0, 6.5 & 7.0mm)
  • (1) Dust Boot Set
  • (1) Instruction Sheet
  • (1) Pre-Run Certificate

This product was added to our catalog on March 15, 2017

Zac Hoke
Verified Owner
Thursday, May 11 2017 (about a year ago)
ProTek RC Euro LS-5 .21 Long Stroke 5-Port Competition Off-Road Engine (Pre-Run)
I bought this from a recommendation from the Techs at Amain, all I can say is WOW!! I took it easy on the motor for the first four tanks of Byrons 30. On the four tank I started race tuning, and this thing came alive. This motor rips, great low and mid with unexpected top end. I paired it with the Novarossi EFRA 2096 Off Road Super Strong Tuned Pipe w/Short Smooth Manifold. Highly recommend this product.
Richard Hess
Verified Owner
Wednesday, Aug 2 2017 (about a year ago)
ProTek RC Euro LS-5 .21 Long Stroke 5-Port Competition Off-Road Engine (Pre-Run)
Absolutely love this motor, super easy to tune, tons of low end power, super strong idle. Perfect for a truggy and for a buggy if you like bottom end
Chris Bowen
Verified Owner
Sunday, Mar 26 2017 (about a year ago)
ProTek RC Euro LS-5 .21 Long Stroke 5-Port Competition Off-Road Engine (Pre-Run)
Ok so I have the other expensive name engines and they get really costly to run when you like to practice all the time. So I gave this one a try and all I can say is "WOW"
Take your time breaking this thing in and it's a beast and it idles all day perfect (last 3 days) Think I'll get some more for the price