Why need the grease zerk? 99% of the rear carrier bearings on the market today are sealed bearings, and already have grease in them. There is no way greasing the carrier will reach the bearings, they are sealed, plus you would have to pump in a ton of grease to even think it is helping. Im not saying the carrier isnt good, if its a dual row carrier, it is a huge upgrade over the stock single bearing for the 350x. I would consider it for that over the grease zerk.
THE 80's RAGE! Currently owns:
81, 85 Yamaha Tri Moto 125
83 Yamaha Tri Moto 200 x2
82,83 Yamaha Tri Moto 175 project
85 Yamaha Tri Z 250
84 Kawasaki Tecate 250
84 Honda ATC 70
85 Honda ATC 350X
84 Honda ATC 250R
(2) 84 Honda ATC 200x
82, 83 Honda ATC 185s
81 ATC 200
Lots of other parts and bikes