In response to strong request from the market, OS Engine have decided to release the special limited version of R21 for 1/8 ON-ROAD RACING:  O.S.SPEED R21 SHIMO edition.

Takaaki Shimo, who won the 2nd prize in the IFMAR 1/8 ON-ROAD World Championship in Brazil last October, only 0.2 second behind the champion.  O.S. SPEED R21 SHIMO edition has exactly the same specifications he used in the championship.
The following are features of the special edition.
1. Special outer head (silver with special design)
2. Special crankcase (one side of the logo is shiny)
3. Special carburetor restrictor (8.0mm silver)
4. Special gasket combination (2 pcs of 0.1mm and 1 pc of 0.15mm)
5. T-2080SC muffler is hand made at his factory.
6. Special carburetor spacer to increase middle range torque
7. Steel rear ball bearing, which he prefers with combination of the special carburetor spacer.

Specifications :

• Displacements : 3.49cc
• Bore : 16.08mm
• Stroke : 17.20mm
• Output : 33,000rpm
• Practical RPM : 4,000 ~ 45,000 rpm
• Weight : 340g (Engine only)