S.SPEED R21 Shimo Edition 3 Racing Engine Combo Set TR03 EFRA2196 & MR05 

O.S.Engines would like to introduce all new O.S.SPEED R21 SHIMO EDITION 3. Latest collaboration engine with O.S. Team driver Takaaki Shimo. 

On exhaust section on crank case, using spacer(s) that is provided, the engine will perform more linear from low to top end. Cylinder liner is now 9 port with new treatment of piston for longer life of the engine. The carburetor, to avoid fuel leakage and air in the line, it uses Dust cover ring to make the idle better and stable. 

Exterior of engine uses deep gold outer head, venturi to create all new look. To maximize the performance, combo set comes with TR03 EFRA2196 + MR05. 

With additional treatment of piston and new matching cylinder will provide longer life than previous 9-port without treatment. 

R connecting rod from R2106 to withstand all the harsh on-road race scenes. 

Outer head s all new design fins with improved heat management. 

We use a Ceramic rear ballbearing for better performance. 

There are changes on the crank case to adapt spacer(s) provided on the exhaust section. Depending on the tracks and conditions, drivers can choose to use exhaust spacer(s) to change the performance of the engine. 

For the dust cover, to avoid fuel leakage and air going in with Dust cover ring . 

Specs: 

Displacement: 3.49 cc 

Bore: 16.08mm 

Stroke: 17.20mm 

Power: 2.80 ps / 2.76 hp @ 35.000 RPM 

Practical RPM range: 4.000-45.000 

Engine Weight: 347g 

Included: 

TR03 EFRA2196 Exhaust pipe & MR05 Exhaust manifold 

Glow plug: T-RP7 

Reducer: ö8.5 

Exhaust seal ring 

Dust cap set: 12-30 

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O.S.Engine Nitro Motor R21

Club racers rejoice! The R21 is based on the Championship heritage of the R2102 engine and delivers an unbeatable blend of power and value for 1/8 on-road racing. Its crankshaft and piston/liner are designed with premium performance and easy maintenance in mind, which makes it an ideal choice for beginners. This engine is upgradeable with high-performance O.S. Speed parts, letting you realize your full winning potential. High performance. Low price. That's what you can expect from the R21, only from O.S.

Features:

• The perfect power plant for rookies and club racers.
• Newly developed crankshaft and piston/liner with the capability to upgrade later to a Spec-class performer.
• RP7 Turbo glow plug.
• 8.5 mm carb reducer.
• Speed flywheel collet.
• Exhaust seal ring.
• Dust cap set.

Specs:

• Displacement: 3.49cc
• Bore: 16.08mm
• Stroke: 17.20mm
• Port: 5
• Power Output: 2.75 PS  @ 33,000 RPM
• Practical RPM Range: 3.000~41.500 RPM
• Weight: 350g
• Includes: RP7 Turbo glow plug, exhaust seal ring, 8.5 mm carb reducer, dust cap set

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