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OS .21 RZ-V99B

New power punch for 1/8 scale racing!

Created expressly for 1/8 scale racing, the new .21 RZ-V99B engine produces even more usable power than RZ-B Series engines, delivering 5% more torque for hole shots and corner exits, and 8-9% more power for speed at the top end.

  • ABC construction shortens break-in dual bearings and a slide-valve carb smooth out friction and throttle response
  • New, 1-piece boost port supports higher power goals while offering greater reliability
  • Head has been redesigned for better fuel burn inside and more cooling outside
  • Additional webbing on crankcase exterior adds to cooling capacity and helps withstand stresses that can lead to distortion and bearing bind under racing conditions
  • Also available with a built-in pilot shaft (P), for added convenience on cars requiring this feature
  • Includes: #201 air cleaner
    Requires: tuned pipe, manifold, coupler, fuel & glow plug
Displacement 0.211 (3.46 cc)
Bore 0.654 in (16.6 mm)
Stroke 0.630 in (16.0 mm)
RPM 3000 - 40000


2.4 BHP @ 30000 RPM
Weight 11.71 oz (332 g)
Price R Not Available