nytro changes after 2009

[sled freak]

I am doing a little research on the 2013 XTX 1.75, I have a 2009 XTX with a 1.75 back country track, 20/39 gearing, some clutching, but I was curious as to what Yamaha had done to the 2013, hence my research. Anyway I found out that for '13 the 1.75 XTX has 20/39 gearing as well, all of the clutching is the same except for the secondary spring which is white/white now in place of white for my '09 and the sliding secondary sheave is different. Ok on to my point, does anyone know why Yamaha changed the sliding secondary sheave(it changed in 2010 actually)?

 

[moyiesledhead]

Someone correct me if I'm wrong, but I believe it was to correct a cracking issue on the 08/09's. Both mine and my son's have had that problem.

 

[sled freak]

Thanks for the reply, this is the first I have heard of the secondary cracking. Was it a recall?