If your truggy needs reliable punch off the start and a usable powerband, the O.S. Engine 28XZ is tuned for that role. Rider and racer input helped shape an engine that balances torque, throttle feel and heat control.
The 28XZ’s 0.284 cu in (4.65 cc) displacement and engine mapping deliver a strong power output, measured at 3.31 hp at 32,000 rpm. The enlarged two-piece head and inner head button enhance heat dissipation during extended running.
Key durability items include a sealed front bearing and a high-quality inner bearing in the crankcase. The oiled-bushed connecting rod increases longevity while the three-needle 21J slide-valve carburetor gives precise tuning options for track conditions.
For track-focused setups the Mark Pavidas Edition Tuned Pipe (OSMG2969) is a recommended match to improve exhaust scavenging. Check recommended flywheel sets for Mugen and Kyosho chassis for optimal throttle response.
The 28XZ is a practical, tunable choice for truggy owners aiming for dependable on-track results and compatibility with popular performance parts.
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