ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)

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ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
Price: $349.99
Discontinued Online
This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.

This is the ProTek R/C 321B "Samurai V2" Off-Road 3-Port Competition Buggy Engine. 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’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.

 

Features:

  • 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)

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)

Specifications:
Displacement:
3.46cc (0.211cu.in.)
Bore:
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.
Weight:
355g (12.52oz)

Includes:

  • (1) 321B "Samurai V2" Off-Road Buggy Engine
  • (1) P3 Turbo Glow Plug (Ultra Hot)
  • (1) 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

This product was added to our catalog on August 20, 2014

Dan Hissam
Verified Owner
Sunday, Nov 9 2014 (about 9 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
This motor is very impressive and has the perfect balance of power/runtime/ease of tuning and reliability. The folks at Amain knew what they wanted in a top level engine and the performance is second to none. The power is robust, yet very smooth and never runs on. The ease of tuning is also unrivaled. This mill inspires confidence, has a very stable idle and is extremely forgiving to tune. Serious sportsman drivers all the way up to pros will appreciate the linear power and consistency. Thank you Amain for bringing this level of performance and ease of use back to us!

Settings: (These are my finalized settings AFTER break-in and 1 gallon of fuel) use the recommended break-in procedure in manual!!!!!!!!

Samurai 321

Altitude: sea level-1500ft.
Ambient temp: 75-80*F
Buggy: Mugen MBX-7
Fuel: Nitrotane 30%
Plug: O.S. P3 (included)
carb restrictor: 8mm (included)
Pipe: O.S. 2090 or O.S. 2050
Header: O.S. M2000
Head Clearance (factory setting)
Idle: flush (factory setting)
low Speed: flush (factory setting is 0.5mm OUT from flush)
Mid Speed: (0.10mm in from flush) 3-4 hours leaner than factory setting
High Speed: 1.20mm in from flush
Austin Blair
Wednesday, Sep 3 2014 (about 9 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
This motor is unbelievable! So much power at your finger tip, amazing fuel millage, super easy to tune, and has a ton of top end. What more could you ask for? You wont have to worry about not being able to clear a big triple anymore.
Anonymous
Friday, Oct 3 2014 (about 9 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
I pitted for Chris Chim at the Worlds in Sicily and he was running this engine. They had a speed gun clocking the cars as they came down the straight. His motor was constantly as fast or faster than any car. It dropped straight to idle when he let off the throttle and fuel mileage was equal to everyone's. This motor is impressive!
Joe Ad
Verified Owner
Tuesday, Oct 13 2015 (about 8 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
Absolutely brilliant motor. Smooth bottom with explosive top end scream. The 2090 is the best pipe for this in both buggy and truggy.
Kevin Lewis
Sunday, Jul 19 2015 (about 8 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
This motor is the old favourite of the speeds. The VZB with a case now that doesn't break. Fantastic engine.
carl smart
Thursday, Jun 11 2015 (about 8 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
dropped this in a new tki3 did the recommended break in and hit the track. this is a really awesome mill ran a couple tanks on the track still rich(not fully raced tuned)and still had a nice smooth but powerful bottom and excellent top end with a the pro tek 2060 gonna be a killer when fully tuned a++++ on this motor
Jeff Stroup
Verified Owner
Sunday, Sep 7 2014 (about 9 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
This motor is just incredible. I broke it in a Friday before a weekend long tournament and it could not have went smoother. I ran it all weekend with no issues what so ever including no flame outs. This thing has crazy amounts of power from bottom to top end. Compared to my jq engine its easier to tune and has better fuel mileage. Overall I couldn't be more satisfied. Just buy a few spair p3 plugs and a protek 2060 pipe and your set!
jeremy de coster
Monday, Aug 25 2014 (about 9 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
Yayy an O.S. speed for 50$ less + you get a cool wooden box. Im in!
Francisco Alberto Mijangos Topete
Verified Owner
Friday, Feb 9 2018 (about 6 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
Absolute power! ¡Amazing fuel economy! Big bang for the buck!

You can't go wrong with this absolutely amazing and fine machinery,
to the exterior starting with the package, box, and what is inside finish of the engine,
tons of quality of this OS based engine interior, easy to tune, and holding the setting in really fine
carburetor, and the power is unlimited in the straight, yet bottom end punches
with easy any bump and jump of the track. 2060 pipe is what I suggest for buggy.

Fuel Economy is a blast! 6.5mm restrictor will work all around, if you
find the sweet spot on the trigger and cruise the track can easily break
the 9minute mark for a refill, a trained finger and light drive train of the buggy
will give you more run time, no doubt about it.

Price is a bang! high quality, japan made, hardened crankshaft, finest bearings,
even includes glow plug!

Do not hesitate, go with the Samurai for price, quality, run time, and power.
Russ Holder
Wednesday, Aug 9 2017 (about 6 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
honestly cant go wrong with this motor, super consistent from the day we fired it up to our last race has not missed one beat. long fuel mileage, lots of power, and the reliability is amazing for a nitro motor less stress at the track.
Marcus Myer
Verified Owner
Wednesday, Aug 2 2017 (about 6 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
Best bang for your buck in the industry! This OS based engine will power any vehicle to a podium finish consistently and efficiently. Super easy to tune and maintain.
John Eastwood
Sunday, Jan 2 2022 (about 2 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
Austin had answered my original issue. I’m convinced the new management at amain hobbies is actually honest. Everyone has had good things to say about this motor. I’m happy Austin took the time to try and help me out.
Dharmendra Singh
Wednesday, Oct 16 2019 (about 4 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
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Mugatu
Monday, Dec 17 2018 (about 5 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
Sweetest buggy engine of all time. Was amazing when it was the VZ-B Spec 2, now with more durable updated XZ case and updated carb. I disagree that this engine has lots of torque, because it's a short stroke, and is not nearly the torque monster a XZ-B Spec II or even a B2101 is, so it's not a first choice for truggy. The Samurai sings into high rpm though, has great mid-range, and is arguably the easiest to tune engine on the market. Amazing and smooth linear power. Couple with P3 plug, 2090 pipe and 75mm header.
James Williams
Tuesday, Jul 24 2018 (about 5 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
Hands down my favorite nitro engine (this is based on the V2 w/2090 pipe). It as oodles of low-end torque, a strong mid-range, but does fade a bit on the top end; I believe that is because of the 2090 pipe. When racing off-road, you tend to have a lot of short shoots, jumps with a short run-up, so the low and mid power band is where you spend most of your time. Even though it doesn't hit that banshee scream on the straightaway like others, but I don't ever seem to be any slower. Most of the time I end up on an 8-9 minute pit window, although I could do 10 minutes if I was light on the throttle.

At the end of the day, this engine isn't groundbreaking. What this engine is, is a very high quality, very reliable, very easy to drive engine that doesn't break the bank.

I've had engines from all the big manufacturers, from the cheapest models to the most expensive. This engine has all the power of the most expensive and the right balance between features, durability, tuneability, and cost.

I highly recommend this engine to any racer from beginner to pro.
Robert Jones
Friday, Jul 3 2015 (about 8 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
Great running motor for the first 24 minutes till the rod broke. A main is willing to sell me a replacement rod/piston/sleeve at cost to help me but part is backordered so my new engine sets on a shelf!
Irving Madison
Thursday, May 11 2017 (about 6 years ago)
ProTek RC 321B Samurai V2 3-Port .21 Competition Buggy Engine (Turbo Plug)
These reviews are from 2014 and 2015..... How could they be talking about the engine that hasn't came out till 2017 ? GET IT TOGETHER PEOPLE..... HUM