SSP: £439.99
Part No: L-OS1AN00
OS Engine Speed 21XZ-B Spec III

The 21XZ-B Spec III is that latest evolution of the popular 21XZ-B racing engine from OS. OS are known worldwide for developing race winning 1/8th Off Road World Championship engines and this latest iteration is a result of constant refinement. Using the latest OS design techniques and technology lots of small improvements have added up to a noticeable step forward in performance. These improvements not only enhance the outright performance but also the drivability and usability in high pressure race situations.

• The Spec III has a long stroke for optimum torque
• Improved low-to middle-range torque for corner exits
• 3 scavenger ports and 3 exhaust port cylinder
• Reduced weigh head for a lower CG
• DLC-coated crankshaft with pressed-in tungsten weights
• 21J carburettor with 6.5 mm restrictor

Note: This engine does not include a tuned pipe or manifold.
Glow Plug Turbo P-3 Glowplug (Included)
Weight 353g (12.45 oz)
Capacity 0.213 (3.49cc)
Bore 16.27mm (0.641")
Stroke 16.80mm (0.661")
Power Output 2.61 hp (2.65 ps) @ 34,000rpm
Practical RPM 4,000 - 42,000

Dealer Link
You can purchase this product from any authorised Ripmax dealer from our network across Europe. To find the closest dealer to you, please consult our dealer directory by clicking HERE.