OS Engines Max-21 XR-B Version 3 Nitro Buggy Engine with T-2060S

Features

• The crankshaft has improved response compared to conventional products by changing the counter shape and timing
• Improved response by reducing the weight of the piston. The connecting rod is also made of OSSPEED to improve durability and reduce troubles.
• The outer head, which pursues cooling performance, has been laser-processed with a new shape and a new design
• Newly designed inner head has been redesigned for the shape of the combustion chamber to improve response in the low to medium speed range and achieve stable power characteristics in the high-speed range.
• Two types of reducers are included, 6mm (orange) for off-road cars and 7mm (yellow) for GT cars, in order to achieve performance in each race category.
• Equipped with a double adjust type 21 J3-1 type slide carburetor that has a reputation for ease of handling and response

Specs

Displacement: 3.49 cc

Bore: 16.27mm

Stroke: 16.80mm

Intake ports: 3-port

Practical RPM range: 4,000 – 40,000 rpm

Max. power output: 2.42 hp / 34,000 rpm

Weight: 381g