321B Samurai V2 3-Port .21 Engine Combo w/2090 Pipe (Turbo Plug) by ProTek RC

Store Availability Learn More


Frederick, MD

Unavailable In Store - Check Others
ProTek RC
Low Price: $439.99
Add To Cart Add to Wish List
In Stock Online!
Usually ships in 24 hours
FREE Shipping Eligible!
This item is eligible for Super Saver Shipping Learn More

This product was added to our catalog on November 21, 2014.

This is the ProTek R/C 321B "Samurai V2" Off-Road 3-Port Competition Nitro Engine Combo. This exclusive combo combines the powerful 321B "Samurai V2" with the hard-hitting bottom end delivery only a ProTek R/C 2090 Tuned Pipe Set can deliver.

The 321B “Samurai V2” Off-Road 3-Port engine is ready to lead you into battle – a samurai, by definition, is a noble, powerful warrior willing to serve his master – with a short-stroke, turbo head, rear ceramic bearing and legendary, easy-to-tune carburetor, it’s easy to see why the ProTek racing engine bears the Samurai moniker!

The Samurai sips fuel without sacrificing horsepower thanks to the new LRT carburetor. The handcrafted powerhouse has been built meticulously by a world-renown Japanese engine manufacturer, to the specs of AMain Sports & Hobbies’s top pro drivers.

The Samurai delivers a versatile package like no other – excellent fuel mileage, predictable, crisp throttle-response and consistent carburetor settings are all traits every racer needs to stand atop the podium – to be crowned the master of his class.

The Samurai 321B has been meticulously designed and crafted in Japan by a leading maker of model engines. It has been manufactured in limited production runs guided by nearly 80 years of experience and an unrelenting commitment to both quality and performance.

ProTek R/C 2090 Tuned Exhaust Set (PTK-2090)
The ProTek R/C 2090 is a finely-crafted competitive .21 off-road tuned pipe that features a mirror like chrome finish and high strength welded nipple. Designed with a narrower, longer body, the 2090 is ideal for increased bottom end performance and small track optimization. Although the 2090 is not as smooth as the ProTek R/C 2060 pipe, it will provide great torque for those hard to clear jumps, and heavy truggies.


Samurai 321B Features:

  • Includes 2090 Tuned Pipe and Manifold
  • Superior tunability
  • Low CG cooling head
  • Increased fuel mileage
  • Unrivalled power
  • Smooth and responsive power band
  • 6 & 6.5mm circular restrictors
  • Ceramic rear bearing
  • ABC piston and cylinder
  • Ultra hot ProTek P3 turbo glow plug
  • Strengthened black-coated crankcase
  • Utilizes LRT Carburetor (PTK-2570)

2090 Tuned Pipe Features:

  • Included manifold
  • Mirror chrome like finish
  • Durable high-strength welded nipple
  • Narrow, long body design
  • Maximum low-end performance

Recommended Exhaust:

  • PTK-2060: ProTek R/C 2060 Tuned Pipe w/Manifold (PTK-2060-1: pipe only)
  • PTK-2090: ProTek R/C 2090 Tuned Pipe w/Manifold (PTK-2090-1: pipe only)

Recommended Glowplug:

  • PTK-2542: ProTek R/C P3 Turbo Glow Plug (Ultra Hot)

3.46cc (0.211cu.in.)
16.6mm (0.654in.)
Stroke: 16.0mm (0.630in.)
Practical R.P.M.: 3,000 - 40,000
Power Output:
2.5ps / 34,000 R.P.M.
355g (12.52oz)


  • (1) 321B "Samurai" Off-Road Buggy Engine
  • (1) 2090 Tuned Pipe & Manifold Set
  • (1) P3 Turbo Glow Plug (Ultra Hot)
  • (3) Manifold Exhaust Springs
  • (2) Tuned Pipe Exhaust Springs
  • (3) High Temp Exhaust Gasket
  • (1) 6mm "Circular" Aluminum Carburetor Restrictor
  • (1) 6.5mm "Circular" Aluminum Carburetor Restrictor
  • (3) Dust Caps (3mm, 16mm & 17mm)
  • (1) Instruction Manual
Thomas Jennette
Verified Owner
Sunday, Apr 17 2016 (about a year ago)
ProTek RC 321B Samurai V2 3-Port .21 Engine Combo w/2090 Pipe (Turbo Plug)
I put one in my Kyosho STRR Evo 2 I just built and I am very impressed! I only have about a gallon through it, but it was an easy break in with 3 tanks at fast idle, 5 tanks heat cycled, and 3 tanks tuning for 1st race. I ran it a little rich on top but still had ample power to TQ, and win. This motor has an awesome bottom end with the 2090 pipe and plenty of top end to go with it. Oh, and it idles perfectly all day long! I can't speak to the longevity yet, but I will post more as the season goes on. For 1st impressions I have to give it my highest recommendation A+++.)
Richard Hess
Verified Owner
Wednesday, Mar 25 2015 (about 2 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Engine Combo w/2090 Pipe (Turbo Plug)
Awesome Motor has to be one of, if not the easiest motor ever to break in and tune !!! great power great run time super smooth power band. And that wooden box it comes in is a nice touch)
Nick Cattuna
Verified Owner
Thursday, Mar 12 2015 (about 2 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Engine Combo w/2090 Pipe (Turbo Plug)
This is absolutely the best engine I have ever owned. Easy to tune, extremely reliable, smooth power and great fuel mileage!!! I would recommend this engine to anyone!)
Verified Owner
Saturday, Sep 19 2015 (about 2 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Engine Combo w/2090 Pipe (Turbo Plug)
I love the power this engine makes! Another great Protek product!)
Bobby Archer
Verified Owner
Thursday, Mar 3 2016 (about a year ago)
ProTek RC 321B Samurai V2 3-Port .21 Engine Combo w/2090 Pipe (Turbo Plug)
I am new to racing nitro and bought this motor at the recommendation of some other drivers. Being a little overwhelmed at first with the thought of breaking in and tuning a nitro, this motor made it very easy. It was very easy to break in and required minimal tuning to get ready for the track. Great product from ProTek.)