This is the Mugen Seiki Ninja JX21-B04 3-Port Off-Road Competition Buggy Engine. The Ninja JX21-B04 was designed to deliver maximum performance and reliability for 1/8th buggy, truck, and GT racing applications. The Ninja JX21-B04 is manufactured in Japan by a leading maker of model engines. With a square bore and stroke configuration, a balanced and DLC coated "tuned" crankshaft this engine produces gobs of usable power and is very fuel-efficient. As an added bonus a ceramic rear bearing was selected to provide increased throttle response and higher top speed. The engine is finished off with a light weight, low-profile cooling head adorned with laser-etched Ninja graphics, an easy to tune three needle carburetor with aluminum 6.5mm aluminum venturi, and the air/fuel mixture is ignited by the ultra reliable P3 turbo glow plug.
Displacement: 3.46cc (0.211 cu.in.)
Bore: 16.40mm (0.646 in.)
Stroke: 16.40mm (0.646 in.)
Practical R.P.M.: 4,000 - 42,000 r.p.m
Power Output: 2.61 PS / 34,000 r.p.m.
Rear Bearing: Ceramic
Glow Plug Type: Turbo
Carb. Venturi: 6.5mm var.
Carb. Material: Aluminium
Weight: 352 g / 12,42 oz