O.S.Engine MAX-R21 V2 Racing Engine MAX-R21 VER.2 is developed for 1/8 on-road racing with excellent cost performance that can be easily used in races for entry level to sports users. Crankshaft and carburettor have been revised from the previous model for more ease of use. The cooling head is blue which is the image color for Max series with a new laser engravement design.
New Features: • Crankcase design from R2106 • The crankshaft has 3 bronze counterweights for better low/mid range speed feel and easier to handle • New outer head has better cooling and also with a new laser engravement design • The inner head has similar O-ring type used in the R2106 • The carburettor is 21M4 which is same design as with the R2106 engine for easier adjustment |