New SMJ Kabuto .21 off- and on-road racing engines [GALLERY]

0 April 13, 2017, 8:56 a.m.

By Aaron Waldron
LiveRC.com

New from Speedmaster Japan:
www.smj-rc.com

Speedmaster Japan has released three new nitro engines, developed by Masayuki Miura - best known as Atsushi Hara’s mechanic. The engines are broken in by Yurugix prior to being sold, so that they can be installed and used right away.

Based on the O.S. Speed 21XZ-B, the 21XB2 Power and 21XB2 Eco are designed for 1/8-scale buggies and GT vehicles and differ in venturi size - the Power model uses a 7mm venturi for high-speed tracks, and the Eco’s 6mm venturi increases fuel mileage. The R21 is built upon the O.S. Speed R2101 and comes with a 8.5mm venturi. All engines feature DLC-treated crankshafts with tungsten weights, as well as ceramic rear bearings.