21XZ-R 1/8 Scale On-Road Engines
Two powerhouses for dominating the competition!
With O.S. 21XZ-R 1/8 Scale On-Road Engines there's no need to choose between power and fuel economy – they offer the best of both! The 21XZ-R Speed can complete a 10-minute heat with one pit stop, while the easy-starting 21XZ-R VII lets you unleash its race-winning potential right out of the box.
- Huge horsepower AND excellent fuel economy – can complete a 10-minute heat with just one pit stop!
- Redesigned crankcase and carb produce smoother transitions and higher speeds.
- The 21M slide-valve carb features 4 adjustable control settings, including a low-end metering needle for improved torque and fuel economy.
- A more-balanced conrod reduces vibration and wear.
- Includes: RP7 glow plug, exhaust seal ring, head gaskets, 9 mm (red) carb restrictor, flywheel collet & dust cap set.
21XZ-R Speed Features
- Many of the same performance features as the 21XZ-R Speed ABC, in a more affordable package!
- Combines aggressive timing with easy starting, so you can unleash its race-winning potential right out of the box.
- The cylinder liner boasts 7 scavenger ports and three exhaust ports.
- Includes: RP7 Turbo glow plug, exhaust seal ring, 0.01 & 0.02 mm cylinder head gaskets, 8.5 mm (purple) carb restrictor, flywheel collet & exhaust, carb and fuel nipple dust caps.