Product Information
Traxxas TRX 2.5R Engine With Pull Start

NOTE: Picture is shown with EZ Start. This engine comes with pull start.

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

With 60% more power than the 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 new T-Maxx? 40+mph and wheelies on demand! These examples are a strong testament to the power of the TRX 2.5 Racing Engine.

The great thing about TRX 2.5 power is that it feels like it is on-pipe across almost the entire RPM scale. Theres lots of power down low for tire-spinning, wheelie popping torque, and theres big power up high for screaming, top-speed performance. The TRX 2.5 Racing Engine was built to provide big horsepower all the time, with little focus on an exaggerated peak horsepower number that occurs at an impractically high RPM. Its made for real world drivers like you (and us!) that just want to rip-it-up on the track, in a field, or anyplace you can find.

The many things that were put into the engine to maximize power output and efficiency also have the benefit of making the TRX 2.5 Racing Engine easier to tune. Its tolerant to to a very wide range of needle settings and variations in temperature, altitude, etc. The engine is tightly sealed with o-rings throughout to eliminate air leaks that can cause inconsistent running performance. The engine responds precisely to changes in the needle settings for easy, predictable tuning.

If all of that were not enough, the EZ-Start 2 electric starting system is all new. No starting method is more convenient than the push-button system Traxxas pioneered years ago on the Pro .15 engine. Since then, weve listened to customer feedback and made the EZ-Start 2 the most reliable and easy-to-use ever. Its lighter, stronger, and innovative new ideas have made it virtually bulletproof. Youll never go back to clumsy starter boxes, bulky drill drivers, or sweat-inducing pull starters!

The heart of the TRX 2.5 is its all-new 12mm IPS (Integrated Pilot Shaft) crankshaft. Vibration and inconsistent gear mesh caused by common two-piece crank designs can steal up to 10% of the engines power. The one-piece IPS crank provides extremely precise gear mesh and virtually eliminates vibration. In addition, the crank is precisely positioned by the front bearing for nearly zero crankshaft endplay.

The IPS crankshaft undergoes multiple hardening processes. Surface preparation includes surface hardening, precision grinding, and micro-polishing for extremely long-wearing performance.

The bottom end of the connecting rod rotates on an extra large-diameter crankshaft pin, much larger than what is typically used in this size engine. This provides the reliability needed for these critical components in such a high-powered engine.

The TRX 2.5 is equipped with the all-new TRX Composite Slide Carburetor. The slide carburetor is most desired by performance enthusiasts because it provides less restrictive, straight through airflow for more power and better throttle response than the more common barrel carburetor. Its an expensive option on some engines, and not even available on others!

This is no ordinary slide carburetor either. Its Molded LCP (Liquid Crystal Polymer) body is lighter than metal and greatly reduces power-robbing heat transfer to the carburetor body. In addition, the precise molding techniques used to produce the carburetor allowed Traxxas engineers to develop an integral molded spray bar for the best possible fuel atomization. The complex spray bar shape is unique to the TRX 2.5 Racing Engine and provides increased torque and efficiency throughout the engines entire operating range. Its another first from Traxxas! The precision molding also provides a smoother, better-flowing inlet tract than cast or machined carburetors.

The carburetor, air-filter, and crankcase are tightly integrated to provide the smoothest, most continuous airflow with the least possible turbulence. Bottom line, the TRX 2.5 Racing Engines composite slide carburetor flows more air faster and more efficiently than conventional carburetors

Convenience features include a low-speed needle with a positive stop to prevent damage to the spray bar from over-tightening. Also, a rubber dust boot seals out harmful dirt and covers the built-in throttle return spring. The high speed needle uses a fine pitch thread on the needle for super-precise tuning adjustments.

Manufacture Part No.: 5207R
Manufacture: Traxxas RC Model Parts

Product Status: Available
Shipping Wait: Usually Ships In 3-5 Days
Condition: New

MSRP: $130.00
Our Price: $117.00