Extrovert Track DriversKimpex & Whal Brothers
Extrovert Track Drivers
Kimpex & Whal Brothers
Fits the following sleds:
RX Warrior 04-05
RS Nytro 06-07
FX Nytro 08-14
Starting in 2010 Yamaha started offering extrovert drivers from factory on the Apex and Vector models. Prior to Yamaha adding them they have been a popular upgrade with the use of aftermarket drivers such as Whal Brothers. Kimpex makes a 9 Tooth extrovert driver that will work on many of the Yamaha sleds. We've pressed a trial set onto a shaft to verify proper fit, and they went on well.
To run extroverts all track windows must be open. The stock ripsaw tracks on many Yamaha sleds have every third window open so they will need to be cut open if not replacing the track. It was always our belief that the tracks must also be fully clipped to run extroverts, but after discovering that the SR Viper sleds have extroverts and are not fully clipped we no longer believe that.
Running extroverts allows the track tension to run looser as extroverts will prevent "racheting" or track slip on the drivers. A looser track results in reduced hyfax wear.
These drivers are considerably cheaper than the Whal Brothers. A set of kimpex drivers will be available for $70. We also sell the Whal Brothers extroverts. They are available in 7, 8, 9 tooth for $160 a set. 10 tooth are also available for $200 a set.
We will also be selling used shafts with the extroverts already pressed onto the shaft. Contact us for pricing on a complete assembly ready to install.
Note: All sleds with the proaction suspension ( 03-04 RX-1, 04-05 RX Warrior, and 05 Rage) will require teeth to be machined down for clearance. We can provide this service if need be. Please contact me before ordering.