O.S. SPEED R21 Shimo3 Edition tuned by "Rody"

This 9-port engine features a specially treated piston and a newly matched cylinder for enhanced durability and longer lifespan. The LGC cooling head and 8.5mm carburetor restrictor are anodized in a distinctive color exclusive to this edition.

Additional upgrades include a new Dust Cover Ring and exhaust spacers to fine-tune engine performance to your preference. This package is completed with the latest EFRA2196 tuned muffler and its MR05 manifold, making it a truly special edition for performance enthusiasts.

Spec.--------------------------- Displacement：3.49 cc / 0.213cu.in. Bore: 16.08mm / 0.633 in. Stroke:17.20mm / 0.677 in. Output 2.8 ps / 2.76 hp / 35,000 r.p.m. Practical rpm range: 4,000-45,000 r.p.m. Weight:340g / 11.99 oz.

Included： Glow plug RP7 /Dust cap set/Exhaust seal ring TR03 EFRA2196 /MR05 Silencer & Exhaust Manifold O.S. SPEED Flywheel Cone

Warning: it is recommended to perform the break-in using the 2 washers supplied in the box, installed between the engine and the manifold.