ASM R02SP Type 4v2

ASM R02SP Type 4v2

The next evolution for the ASM R02SP includes a new button head and venturi for increased bottom end power.  Using R2102 parts from OS and then blue print fitting for the best fit parts, Nuclear took it another step.  Designed and made their own case for increased power and efficiency!  

The Type 4 includes a treated wrist pin, treated rod,  treated back plate, treated sleeve and treated custom piston for better strength and efficiency. The custom piston has a designed dome that will help to aid in the prevention of detonation while maintaining the best possible combustion through it's development. This is the highest spec. ASM has to offer for the serious racer.

Available as non-broken in, bench break in and complete break in.


  • Stoke volume: 3.49cc
  • Borre: 16.08mm
  • Stoke: 17.2mm
  • Practical rotation speed: 4,000-45,000rpm
  • Output: 2.8ps / 33,000rpm (2.76hp / 33,000rpm)
  • Weight: 340g


  • Standard plug T-RP 7
  • Exhaust seal ring
  • Taper collet
  • New ASM inner head
  • New venturi

*If the engine is out of stock, you can arrange to also have it drop shipped direct from Japan if you are in a hurry.

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ASM R02SP Type 4v2

  • Brand: ASM
  • Product Code: ASM2B500004O
  • Availability: PRE-ORDER
  • $636.99

Available Options

Tags: ASM, R02SP, ASM21, .21, nitro, GP, engine, Type 4, v2

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