I have a set of KLX 300 forks on my KDX 200, but the internals are basicly the same as the stock 43 mm forks, is there any performance gains ? I really dont know yet as Im still healing from a broken leg/ankle. The only problem that I can see by swaping to a KX front end is the travel difference, the KDX is less than the KX fork. Im not sure what the actual travel is on the KDX, about 11" I guess and the KX should be about 12". Not really a major problem, as any good suspension tuner can shorten up the travel on the KX fork, but will it match the stock travel ? You will also have to have a KDX steer stem pressed into the lower triple claimp unless the stems are the same.