Mugen Ninja .21 1/8 Off-Road

Tower Stock# MUGG2103  •  Manufacturer Stock# JX21B03
Mugen Ninja .21 1/8 Off-Road (large view)
Notes from our tech department:
This is the Mugen JX21-B03 Glow Powered Ninja .21 Engine
for 1/8 scale Off-Road Buggy. Truck and GT Racing.


Three needle slide valve carburetor with preinstalled 6.5mm reducer
that is suitable for high-speed and flat courses that require
DLC coated and balanced tuned crankshaft
Low profile ten fin blue cooling head with laser etched Ninja
Ceramic rear ball bearing for increased throttle response and higher
top speed
Square bore and stroke configuration
ABC piston and liner construction "A"luminum piston fitted to a
"B"rass cylinder liner that is "C"hrome plated


JX21-B03 Ninja Engine, Slide Valve Carburetor with 6.5mm Reducer
P3 Turbo Glow Plug, Carburetor and Exhaust Covers and Instructions


Fuel: 10-30% nitro content, 20% recommended for break-in
Air Filter
Exhaust System
Glow Starter and Track Equipment


Displacement: 0.21cu in (3.46cc)
Bore: 0.646 in (16.40mm)
Stroke: 0.646 in (16.40mm)
Practical RPM: 4,000 - 42,000
Power Output: 2.61 PS / 34,000 RPM
Ports: 3
Sleeve: ABC
Rear Bearing: Ceramic
Glow Plug Type: Turbo
Exhaust: Rear
Carb. Venturi: 6.5mm var.
Weight: 12.42oz (352g)
Fuel: 10-30% nitro content, 20% recommended for break-in
Height from crankcase bottom to top of cylinder head: 3.9" (98.2mm)
Height/crankshaft center to top of cylinder head: 3.2" (82.5mm)
Width including mounting tabs: 1.8" (45mm)
Width not including mounting tabs: 1.2" (30.8mm)
Width/mounting hole centers same side: .83" (21mm)
Width/mounting holes opposite side: 1.5" (37mm)
Cylinder head diameter: 2.3" (59mm)
Length of exposed pilot shaft/crankshaft: 1.17" (29.6mm)
Internal thread size at end of crankshaft: 2.3mm

jxs 07/28/15

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