This is the O.S. 21XZ-B VII Off-Road Competition Buggy Engine. The 21XZ-B VII is light, cool running, with a low CG. Delivering power comparable to the Speed Spec II, the 21XZ-B VII exceeds expectations at a lower price. 1/8 scale drivers looking for a performance advantage will find it with the 21XZ-B VII powerhouse!
Features:
- Performance that rivals that of the acclaimed Speed 21XZ-B Spec II
- Shares the same piston, liner and con rod as the Speed version
- Lightening holes in the cylinder head reduce overall weight
- Other enhancements include a lower CG and improved cooling
- A 22B2 single needle carb makes tuning a breeze
- Optimized power band
- Silicone filled crankshaft with tungsten counter weights
- Blue anodized head
- Incredible throttle response
- 7mm carb reducer is included
Specifications:
Displacement | .213 cu in (3.49 cc) |
Bore | .641 in (16.27 mm) |
Stroke | .661 in (16.8 mm) |
Practical RPM | 3,000-41,500 |
Power Output | 2.7 hp @ 34,000 rpm |
Weight | 12.77 oz (362 g) |