Originally Posted by yamahaman
A cush drive is a rear hub that has rubber isolation holding the sprocket to stop the hard facing on the gears in the gearbox from comming off and to stop the gears from shattering under hard acceleration and deceleration.
A cush drive is also a must if you plan on doing long hard miles in sandy whooped out tracks where the gearbox is loaded and unloaded by uneven tracks. During a few big races here in Australia (Australian Safari and Finke)there have been a few cases where gear box failures have occured due to this.
NOTE THIS IS DURING RACE CONDITIONS AND USUALLY BY PRO RIDERS WHO HAVE THE BIKES ON WIDE OPEN THROTTLE FOR A LONG TIME
In regards to engine life riding on road, with a cush drive, Engine life should not be compramised if ridden sensibly You can still have fun but keep things within limits. They are not road bikes and shouldn't be ridden like one. If you can learn to keep some corner speed (this will take some time due to the way the suspension reacts) all will be good. If you come to a corner and slam the brakes on and then after leaving the corner give the bike 100% wide open throttle this hard deceleration and acceleration is what kills motors not normal riding
Thanks for the wisdom. I'm pretty stoked about riding the WR more often not it is street ready. crush drive and bigger tank on the Christmas list! Thanks