O.S. SPEED R2106 is the factory tuned engine developed for 1/8 on-road racing competition. The new engine 9 port cylinder liner with re-designed port for more power. Also for great power feel from low end, we have adopted crankshaft from R21 Euro II and well received ceramic ball bearing from offroad engines. Newly designed reinforced connecting rod is now stronger to withstand all the harsh on-road racing scenes.

Spec.---------------------------
Displacement： 3.49 cc / 0.213cu.in.
Bore: 16.08mm / 0.633 in.
Stroke: 17.20mm / 0.677 in.
Output :2.80 ps / 2.76 hp / 35,000 r.p.m.
practical rpm range: 4,000-45,000 r.p.m.
Engine Weight:345g / 12.17 oz.

Standard accessories---------------------------
Glow plug T-RP7
Reducer φ8.5(RED)
Exhaust seal ring
Dust cap set 12-30(φ3、φ16、φ18)