This is the O.S. 25XZ (P) Truggy Engine. O.S. has now built an engine that utilizes the best balance of power, economy and weight that stays well below the max legal ROAR displacement regulations. Power alone will not put you on the podium. You need an engine that allows you to stay on the track while your competition is making pit stops. You need a low center of gravity that helps keep your chassis planted in the turns. You need smooth power delivery at any point in the engines RPM range. The O.S. 25XZ delivers all of that, and more! Like all large displacement engines, the 25XZ produces all the power you need, but what sets it apart from the competition is its ability to deliver gobs of power, with a low center of gravity, at the same time giving you the mileage you expect from a modern engine.
This engine includes the OS21J, 3 Needle Slide Carburetor for easy and reliable tuning, a P3 Turbo glow plug, 8mm carburetor reducer, exhaust gasket and Dust Caps for the carb throat, carb nipple and exhaust.
- Premium power for owning the winnerís circle at 1/8 scale off-road events!
- More muscle than a .21 ó more compact than a .28.
- Lower center of gravity aids in handling.
- A 21J double-adjustable carb ensures smooth acceleration at any speed.
- 10-fin blue anodized cooling head reduces heat.
Displacement: 0.25 cu in (4.1cc)
Output: 3.1 hp @ 33,000 RPM
Bore: 0.689 in (17.5 mm)
Stroke: 0.669 in (17 mm)
Practical RPM: 4,000-39,000
Weight: 13.1 oz (370g)