Originally Posted by markjenn
As previously said, for a dual-sport like the S which isn't likely to see ultra-low tire pressures, they're unnecessary, make tire changing more difficult, add weight, and contribute to wheel imbalance. I've only seen standard rim locks on off-road only bikes.
My previous XT250 (2009) had one on from the factory,
Maybe that is why my buddy who also has a DRZ400S always has to change his rear tubes, he runs around 10-12 psi when we go offroading, and has had like 3 flats in the back while i never had one, i will tell him to add one too.