Can anyone tell me what is the highest handlebar riser I can use without changing throttle cables?
Also what is the best manufacturer of riser blocks to use for my sled?

I was told 2" with the stock cables. I'am putting an Iso-vibe on mine

I have a 2 inch one for sale. It came out of my 01 xc 800. I had all stock cables as far as brake and throttle cables, I'm not sure about the hand and thumb warmers tho since I bought the sled with it installed already.

2" is pretty high. I would use 1 1/2". Unless your going to snocross it.