I put Renthal fat bars on mine as I found the pullback / sweep on the standard bars uncomfortable, I also wanted to lower them. I realise most people seem to like to raise their bars but I found by lowering them the steering became more direct.

I went for the Renthal KTM high bars, I did initially buy the KTM lows but they didn't allow full lock. With the KTM high bars my elbows are further apart and I feel this gives much more control. I also had to change the risers / bar clamps to allow for the thicker bars.

Renthal bar sizes -

http://www.renthal.com/shop/mx-produ...dlebars/fatbar

Renthal bar clamps -

http://www.renthal.com/shop/mx-produ...ars/bar-mounts

The Renthal site says CL018 are for Yamahas but I think this may be for motocross and enduro bikes. I fitted the CL003 and the are perfect. I'm really happy with how mine feels but you should check the dimensions of all the bars and find one that suits what you are trying to achieve. Bear in mind that the dimension "D" on the chart is the clamping width so measure the distance from the outside edge of your bar clamps and this will give you your minimum clamping width, add about 8mm if your getting the Renthal clamps as they are slightly wider.