Viper R/C VST4.5-XL Sensored Brushless 550 Motor (4.5T)

Viper R/C
This item is discontinued and no longer available for purchase. You may want to search our site for a similar item.
Low Price: $94.99
Discontinued Online
This is the Viper R/C "VST-XL" 4.5 Turn, 4,400kV Sensored 550 Brushless Motor. From onroad, to offroad, to the rocks, no matter where you drive, Viper R/C has a motor for your application. Ready to run, is not always good enough. You want your car ready to race, with the power, control and reliability to win. Quality craftsmanship, superior materials and a commitment to rigorous testing are at the heart of Viper R/C Solutionsí product philosophy, so your VST motor not only gets you running, but keeps delivering the power you need to get the most out of your RC car in even the most demanding conditions.

Viper R/C Solutionsí VST series sensored brushless motors offer smooth and efficient performance, durability, versatility and quality. The VST series motors features high precision ball bearings for superior performance, longer life and a re-buildable design. Plus, optional tuning rotors (not included) offer a wide range of tuning options, allowing you to get the most out of your motor. A precision machined 6061 T6 billet aluminum ribbed can is designed to provide the best protection and cooling, while the ultra low resistance, high current soldering tab system provides trouble free connections and easy wiring.

Engineered, built and tested to meet the needs of even the most demanding 1/10 scale RC car applications, Viperís VST series brushless motors provide the smoothest power band and reliable performance for your 1/10 scale RC car.


  • High grade copper solder tabs
  • Lightweight design
  • High grade components throughout!
  • Ribbed Can adds valuable cooling surface area
  • Sealed Can adds longevity and durability
  • Molded timing cap protects sensor board and lightens motor
  • Fully adjustable timing
  • ROAR legal
  • Laser engraved, no stickers
  • 180 day warranty
kV: 4,400        
Case Length:
2.87 in. (72.80mm)
Case Diameter:
1.42 in. (36.00mm)
Shaft Length:
3.5 in. (89mm)
Shaft Extension:
0.58 in. (14.8mm)
9.45oz (268g)

This product was added to our catalog on June 28, 2011.

Verified Owner
Wednesday, Jul 27 2011 (about 6 years ago)
Viper R/C VST4.5-XL Sensored Brushless 550 Motor (4.5T)
Just wanted to wrie a review on this to let people know how it peforms and its benifits. To start off I ran a novak havoc pro sc/ballistic 550 combo for the past 6 months and It was awesome but it ran hot and I seemed to be replacing bearings alot. I am now running Viper vst4.5XL 550 and Mamba Max Pro esc. The temps of the road I was driving on today was 125-134 My chassis was almost too hot to hold on to for a long time just because of how hot the road was. Ambient temps were about 92 with no clouds in the sky. The viper motor never got over 150 Degrees Farenhight running for about 24 miniutes on a 5000mah 30c pack and another amasing benifit of this motor and the mmp esc is that im getting about 8-10 more miniutes of runtime with it. The peformance is also amasing the viper motor is 200kv less than the novak 4.5 but It has a higher top speed and alot more acceleration than the novak motor/system. If you want something with more power and longer runtimes and cooler temps Buy this motor! If you want a awesome programable esc that also hardly ever gets over 150 degrees buy the Castle Creations Mamba Max Pro! So far ive ran this for 2 days and its awesome! Havent got it out to the track yet but im sure it will be just as awesome. just like viper says: "Viper VST XL motors are designed for power hungry Pro 4 trucks to ensure the lowest temps, more efficient and the most reliable running R/C racing systems." Its true. Im non sponsored and on a small budget. This is the best bang for the buck when compared to the tekin and the novak.)
Saturday, Mar 3 2012 (about 5 years ago)
Viper R/C VST4.5-XL Sensored Brushless 550 Motor (4.5T)
Awesome motor. Puts the other motors out there to shame, runs cooler with same power and capable of building even more. Very well built. I have tried the Tekin motors, this is the best one I have found to date, couldnt ask for anything more. Note on sc10 4x4 you will have to cut chassis a little with dremel to fit, not a big deal though. Fantastic motor.)