Recently picked up some 2103 KX450f fork off of ebay to install on my 350sxf. The conversion was pretty straightforward. -shim lower triple clamp -machine axle spacers/bearing adapters for KTM wheel -modify KTM caliper bracket and machine an additional bracket for lower mounting hole -cut off KX fork guard mounting post from lugs and weld on new post to for KTM guards One thing I noticed right away is the weight difference between the two forks. I'm not sure if the WP forks are heavier then the conventional spring KYB or Showa forks, but the weight saving was nearly 3lbs. The feel of the fork is also different then my WP's. I only have about 30 minutes of time since the conversion. On the forks I had to go full soft on the rebound and basically full stiff on the compression, and slow the shock rebound down to get it decent. I wanted to get a baseline feel for the fork before digging into them. I now have the forks apart and noticed that they have already been revalved. After contacting the seller he said they were setup for a 150lbs rider, which is a good bit lighter then the 210lbs i weigh. Anyways just thought I'd share the conversion.