RCCA Membership 900x250
Log In

O.S. Engine 12XZ Speed Spec III

O.S. Engine 12XZ Speed Spec III

This new engine is packed with features like a new cylinder liner and piston for more torque and fuel mileage, plus a redesigned head button for better performance and improved acceleration. Check out all the details in the press release below:

O.S. engineers have taken superior Speed Spec performance to the next level! In addition to smoother acceleration from idle to full throttle, the 12XZ Speed Spec III also has increased low-to mid-range torque. Drivers will still enjoy the same impressive top end speeds that 12XZ Speed Spec engines are known for — with the bonus of improved fuel mileage. In fact, acclaimed on-road champion racer Takaaki Shimo utilized all of the 12XZ Speed Spec III’s advantages to claim victory in the 2012 Japan Nats!


  • Redesigned head button for better performance and improved acceleration
  • New cylinder liner and piston improve mid speed torque and fuel mileage
  • The slide valve’s shape allows for a smoother flow of fuel and air


Displacement: 0.128 cu in (2.1 cc)
Bore: 0.543 in (13.8 mm)
Stroke: 0.55 in (14.0 mm)
Practical RPM range: 5,000-44,000
Output: 1.73 hp @ 35,000 rpm
Weight: 7.9 oz (225 g)
Includes: 12F2(B) carburetor, RP6 glow plug, exhaust seal ring, dust cap set, 5.5 mm red carb reducer

OSMG1992 – 12XZ Speed Spec III Engine – $699.99
OSMG2973 – T-170SC L52 Tuned Pipe Set – $199.99

If you like this article, check out this additional article on O.S. Engine.

Updated: January 2, 2013 — 2:46 PM
Traxxas XMaxx 600x120
Traxxas Projects Digital Downloads 600x120

Leave a Reply

Your email address will not be published. Required fields are marked *

Airage Media © 2017
For all Licensing, Permissions, Awards and Reprint requests please contact our official partner Wright's Media for more information. Please note that Wright's Media is the only authorized company that we’ve partnered with for materials and assets. Wright's Media contact: airage@wrightsmedia.com or (877) 652-5295.
WordPress Video Lightbox