I have a 2011 KZ Sportsmen Classic 16BH and those entry level TT (even the new 2015 models) doesn't come with EZ-LUBE axle or similar axle... I want to add Bearing Buddies grease system on the axle...
Bearing buddies have a spring behind a disc that puts constant pressure on the grease and forces it into the bearings. That said it also puts pressure on the grease seal and will leak out the back and onto the brakes. I would never use them on anything with brakes. Just do the normal bearing repack every 2-3 years. You will be fine.