Ok i have a 2002-2003 Blaster and my chain guide rollers are gone. I went to the yamaha dealer and told them what i needed. the said they had mooes rollers that would fit. THEY did not fit,they came with the roller,bearing and nut and bolt. the bearing will not fit on to the post that is connected to the frame.can some body please help me, give me the right part number for the rollers.