I'm in the process of doing the linkage on my 06 250 and I thought I would replace the chain slider on the swingarm while I'm at it. I went to my local dealer and he had an older model in stock. This slider will fit, but it does not have raised side panels on the top to guide the chain. My question is: Does this matter. Can i just use the older model and forget about it or should I order the newer model chain guide. Has anyone had better luck with the newer style vs. the older one? Thanks in advance