Oury mountian bike grips have a hole for guards and with a little work, they fit over moto bars. They are only 9 bucks a set as well. By the way, check out mountian bike tool kits for your dirt bike. These things are crammed with tools and much lighter and smaller than anything I have seen for dirt biking. I got one that even includes two tire irons and the whole thing is smaller than a leatherman. Has all metric wrenches, screwdrivers, allen wrenches, chain breaker, even a spoke wrench. All for 20 bucks. Only thing is no spark plug wrench. So check out the mountian bike shop for items for your dirt bikeing needs.