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O.S. Speed R21 GT Combo Set
O.S. Speed R21 GT Combo Set

O.S. Speed R21 GT Combo Set

Your Price:$559.00
Retail Price:$639.00
You Save:$80.00(13%)
Out of Stock.
Part Number:1CC01

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OS SPEED R21 GT + T-2060SC + MB01-70 Combo Set


OS SPEED R21 GT is an all-new 5-port engine.

It features a newly developed piston and 5-port cylinder, crankshaft, crankcase, Specially made to fit on-road GT track. 
The OS SPEED R21 GT has a 7mm carburetor restrictor.

Tech specifications:

  • Displacement: 3.49 cc
  • Bore: 16.08mm
  • Stroke: 17.20mm
  • Intake ports: 5-port
  • Exhaust port: 3-port
  • Practical RPM range: 4,000 – 42,000 rpm
  • Max. power output: 2.65 ps / 2.61 hp / 34,000 rpm
  • Weight: 369Gr.

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