I'm wanting to install a rekluse on my bike for a number of reasons mostly for the stall protection and I also want to install the left hand rear brake lever. One other reason is I think it will help with my timbersled kit. I was really wanting the Z-Star Pro because of its high tuneability. However, I'm unable to find a Z-start for my 12' 500 xc-w. do they not make them any more? can you retro one on?