Traxxas TRX 2.5R Engine W/Pullstart

The TRX 2.5 Racing Engine is loaded with advanced engine design features such as the free-flowing rear exhaust, the unique composite slide carburetor, and innovative porting that previously would only be found on the most exotic, modified racing engines. Traxxas brings it all to you and makes it start with the push of a button.

The TRX 2.5 Racing Engine is completely designed and manufactured by Traxxas. Our engineering team spent over 2 years designing not only the engine, but also brand new, state-of-the-art manufacturing facilities to allow us to produce the engine to the absolute highest quality standards. Multiple manufacturing lines allow us to produce a large volume of engines and bring you much higher levels of quality and technology at down-to-earth prices. Since the TRX 2.5 is actually made by Traxxas rather than being purchased off-the-shelf from an outside supplier and re-branded, the TRX 2.5 is backed by Traxxas know how, and Traxxas' unmatched customer support.

With 60% more power than the TRX Pro.15 engine, the TRX 2.5 Racing Engine installed in a stock, out-of-the-box Nitro 4-Tec took it from 50mph top speed to speeds in excess of 60mph, with nothing more than an engine change. Nitro Rustler also gained 10mph to reach 47mph out of the box. By adding a 22-tooth clutch bell 50+mph speeds were attained. The T-Maxx hit 40+mph and gained wheelies on demand! 

Key Features

Slide carburetor provides less restrictive, straight through airflow for more power and better throttle response
PowerTune head is machined from aluminum which promotes even heat distrubution for stable engine temperatures and rock-solid tuning
New sleeve for improved engine efficiency and better power
Molded head protector prevents damage to the head and secures the glow plug wire
Ultra-low restriction air filter provides superior air flow and filtration for more power and a long engine life
Offset wrist pin further reduces piston slide loading for more even cylinder wear and longer engine life

Specs

Displacement: 0.15 cu in (2.49cc)
Crankshaft Thread: 5mm (.197")
On-Center Mounting Holes, Front to Rear: 11mm (.433")
On-Center Mounting Holes, Side to Side: 1.4mm (1.24")
Back of engine(recoil)to front of drive washer: 73.2mm (2.88")
Height: 97.3mm (3.83")
Exhaust Port Diameter: inner -  9.9mm (.392") / outer - 13.0mm (.512")