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Manuals & SupportThe perfect balance between price and performance.
The 21XZ-B Version II delivers ideal performance at a reasonable price. It continues to exceed the expectations of even pro racers, delivering power comparable to the Speed Spec II at a lower price. Upgrades include a lightened cylinder head, improved cooling and a brand new 22B2 single-needle carb for easy tuning. If you're looking for incredible throttle response and the power to conquer off-road, you've found it in the 21XZ-B Version II.

- Performance that rivals the Speed 21XZ-B Spec II
- Shares the piston, liner and con rod of the Spec II
- Easy-tune 2282 single-needle carb
- Optimized power band
- Silicon-filled crankshaft with tungsten counter weights
- Low center of gravity
- Blue anodized head
- Incredible throttle response
Product Specifications
Specs
Displacement | 0.213 cu in (3.49 cc) |
Power Type | Glow |
Crankshaft Threads | UNF1/4-28 |
Crankshaft Type | Threaded |
Cylinders | Single |
HP | 2.6 PS, 2.56 HP @ 34,000 rpm |
Plug Type | P3 Turbo Ultra Hot |
Product Height | 4 in (102.1 mm) |
Product Length | 2.5 in (64.5 mm) from backplate to drive hub |
Product Width | 1.77 in (45 mm) at mounting tabs |
Recommended Fuel | 10-30% nitro content, 20% for break-in |
RPM Range | 4,000 - 42,000 rpm |
Stroke | 0.661 in (16.8 mm) |
Total Weight | 12.77 oz (362 g) |
Bore | 0.641 in (16.27 mm) |
Carb Type | 22B2 single needle slide valve |