Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
MUGJX21B01A
This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.
This is the Ninja JX21 B01A 5 Port Port Off-Road Competition Buggy
Engine from Mugen Seiki! This is a high performance 3.5cc Off-Road
engine, using today's most advanced technology. The engine has been
designed for maximum strength and highest specifications for serious
and real racing. Fabricated from the finest materials available, it
will insure less friction movement for higher speed and more economical
fuel consumption.
The
engine, OEM manufactured by O.S. Engines for Ninja, is loosely based on
their V-Spec with some custom features: the crankcase is from the O.S.
28XZ engine and does not feature the distinctive O.S. 'black' coating,
the sleeve port design is a bit different from the V-Spec, head design,
the crankshaft has the same 'DLC' coating as the O.S. Speed V-spec but
without counterweights. All in all a mix up of a few O.S. engines and
Ninja branding.
Basically this engine is similar to a 5-port O.S. V-Spec engine!
Specifications:
Displacement: 3.46 cc (0.211 cu.in.)
Bore: 16.6 mm (0.645in.)
Stroke: 16.0 mm (0.630in.)
Pratical RPM: 3,000-40,000 r.p.m.
Power Output: 2.48 hp / 33,000 r.p.m.
Ports: 5
Sleeve: ABC
Crankshaft Diam: 14mm
Glow Plug: Turbo (Conical)
Carburetor: 7mm (variable)
Carburetor Material: Aluminum
Adjustment: Double
Weight: 361 g
This product was added to our catalog on December 4, 2008
Anonymous
Wednesday, Dec 29 2010 (about 13 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
ninja ever, and i love it. it holds a tune well and has plenty of power. the pipe i use is a 2041.
Brandon Siegel
Tuesday, Oct 19 2010 (about 13 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
Fantastic engine...1st OS after 7+ years of Novarossi based engines. Stupid fast...yet silky smooth. Currently a tad under 5 gals...replaced rod & installed TKOs at the 3 gal mark. I highly recommend this engine, one of the best I've ever run. Using 8mm restrictor on large tracks & 6mm on indoor/tight tracks in MBX6T with Ninja pipe. The OS 2050 pipe works very well too...takes a bit off the top and adds bottom. Great engine, wish I had more than 1.
MICHAEL RUSSO
Wednesday, Oct 6 2010 (about 13 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
ABSOLUTE POWER HOUSE, KEEPS A GREAT TUNE...RUNNING IT WITH A TEAM ORION 2013 PIPE IN A JAMMIN CTR X2 TRUGGY...GREAT MOTOR 5 STARS ALL THE WAY
Anonymous
Saturday, Jun 12 2010 (about 13 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
Hi!
What is the best pipe for this engine ?
OS T2060 ?
What is the best pipe for this engine ?
OS T2060 ?
Christopher Schneider
Tuesday, Jun 1 2010 (about 13 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
This is the best engine around. It runs great with and seems to have miles of top end. And tuning is easy and only needs a quarter of a turn at the most for tuning and runs close to eleven minutes with a full tank.
shayne matthews
Tuesday, May 11 2010 (about 13 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
had this motor and and ebmod full mod motor of this it is the most reliable motor i have run run-times great the power is plentiful and there is more then enough then anyone could ask for holds tune very well and consistent day in day out very crisp low end and plenty of top and mid very happy
Karl Hoffmeister
Friday, Apr 9 2010 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
Have about 3 gallons through it and this has to be the most reliable engine I have owned. Be it cold indoor tracks or huge outdoor tracks in super hot weather this will not quit. Very smooth power that is always useable. Odonnell #97t, Byrons 25%, and os 2060 works awesome with it.
Joshua Stringer
Monday, Mar 8 2010 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
Can anyone tell me what the stock settings is on the motor the high and the low if anyone could that would be great
Anonymous
Verified Owner
Saturday, Jan 30 2010 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
great engine makes more power than you will need but puts it out in a smooth way tunes easier than my pluse 4 and p5 with better fuel economy ive got about 1.5 gal on mine so far and its really coming alive i highly recomend this motor to anybody that wants a competition motor
Matthew Lust
Verified Owner
Sunday, Dec 27 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
Ran this engine for the 2009 season and plan to run it for the 2010 season. After the third gallon of byrons 20% I changed both bearings - even though there were no problems with the bearings. I run an OS 2060 with the L header, Runs around 215 degrees. Holds a tune very very well, only requires minor adjustments once I got it raced tuned. I use it in my D8 and am planning on purchasing a second engine for my RC8T Truggy. I always use OS P3 plugs, I run a 7mm carb resistrictor and get 11 minutes per tank.
Anonymous
Verified Owner
Tuesday, Aug 25 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
pulled right at 12mins with this motor, on a jamminx2 truggy and jp4!!!! love it -//- well ran my ninja at the track this weekend and got it race tuned. this motor has very, very good bottomend, and top end just keeps on rev. with a jp-4 on my jamminx2. i dont have to push as hard to get over everything. so far i love it. it is ezy to find a tune also. keep ya updated... -//- brake in is ok, but alot of pinch. i have 9 to 10 tanks so far. got temp around 200 and this thing is a bad boy!! still playing with it and will keep ya posted.
R Fleck
Verified Owner
Thursday, Sep 10 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
Initial thoughts after break in are it has typical OS reliability in terms of tuning. It is a bit like the vspec on bottom end but hang on once you pull the hammer. Seems like it take a bit more "running in" before you can slap a race tune on it. Excellent motor for a truggy.
Anonymous
Sunday, Aug 9 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
The os 2050 or 2060. made for os based motor, which this is. But Losi and Mugen have an equivilient
Anonymous
Saturday, Aug 8 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
What is the best pipe for this motor??? I am looking into buying this motor and was wondering which one is best suited for it...
Anonymous
Thursday, Jul 9 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
WHEN WILL THIS MOTOR BE IN STOCK !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! -//- when will this engine be back in stock i heard alot of good things about this motor it has been almost a month
Anonymous
Wednesday, Jul 29 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
@ Sharon Smith: LOSB0085 is the 8ight-T RTR. It has a Dynamite/Losi engine on it. You've given a highly-regarded Mugen engine a bad review instead.
Every new engine is tight. With a new engine of any brand, you need to heat it up before trying to start it. Use a heat gun (or even a hair dryer if you have to) to get it up to at least 160ºf (ideal is 180ºf to 200ºf). Aim the heat at the block, not the head. Then it will turn much easier.
Every new engine is tight. With a new engine of any brand, you need to heat it up before trying to start it. Use a heat gun (or even a hair dryer if you have to) to get it up to at least 160ºf (ideal is 180ºf to 200ºf). Aim the heat at the block, not the head. Then it will turn much easier.
east coast racer
Verified Owner
Tuesday, Jul 28 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
This is a great motor 2.5 gallons and its still strong in my buggy, Idles great no flame outs
Anonymous
Wednesday, Jul 22 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
Amazing! I have a about 7-8 gallons on this, with a jp-3 which eats gas like crazy but from break in to now It has gone from about 7-8 minutes a tank to 11-13 minutes right now. I love this engine and will be certainly be buying anther in the future. It has gotten better and better ever since I first bought it. It has little pinch now and I considered getting it pinched but nitro season is almost over, and it is running its best so I will keep it as is.
Thanks Mugen!
Thanks Mugen!
Radek Schutz
Sunday, Jul 19 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
all racing engines are tight when new. they need proper break in with heating the engine up before trying to start it. Have couple of them and they run strong, easy to tune and grat runtimes.
Jeff Allen
Sunday, Jul 12 2009 (about 14 years ago)
Mugen Seiki Ninja JX21 B01A 5-Port Off-Road Competition Buggy Engine (Light Weight Head)
this motor is awesome. I own several other high end engines such as Novas and OS....but I have to admit, this one has served me well. It has 8 gallons on it, stays tuned, and I purchased a new rod just because I normally need to changed them at this point on other motors....but, there is almost no measurable wear on the crank pin or on the rod bushings! I am very happy with this motor because of its longevity and its performance. Its a little expensive but it performs like an avid racer expects. I think the coated crank has turned this Vspec' ish motor into a great performer.