Introducing the new 2025 O.S.Speed R21-M06 Minicars Special Edition 3.5cc marine racing engine made by O.S.Engine in Japan!
Features:
- New 2025: DLC coated & balanced R21 Euro-II crankshaft with more timing
- New 2025: 9-port cylinder liner with 3-port exhaust & new piston with 3 oil-grooves
- New 2025: Ceramic main ball bearing
- New 2025: Reinforced "R" conrod
- New 2025: RP6 Turbo plug (instead of RP7)
- New combustion chamber with smaller volume for lower nitro levels
- O.S.Speed developed black crankcase with Minicars Marine Laser Engraving
- Black anodized water cooling head with Minicars Marine Special Edition Laser Engraving
- Backplate with steel thrust plate for lower friction and increased durability
- No carb included - choose your own carburetor (15mm diameter neck)
Specs:
- Displacement: 3.49cc
- Bore: 16.08mm
- Stroke: 17.2mm
- Crankshaft dia: 14mm
- Practical r.p.m. Range: 4.000～43.000
- Output: 2.76hp @ 35.000r.p.m.
- Weight: 265g
- Water Cooling Nipple Thread: M5x0.8
Included:
- O.S.Speed R21-M06 2025-Edition Minicars Marine Engine
- RP6 Glowplug
- O.S.Speed flywheel cone
- O.S.Speed decal
- Printed Manual & partslist
Wholesale Distributed by Minicars Hobby Distribution AB.
