WELL finally rode the kx250 01 frame 500 against the k5 98 back to back the k5 98 had the kx450 15 front end on it , the 01 had the better seating position and was easier to move your body around , tight corners 01 was better , flat corners std was just as good if not better , the 15 front end held the std bike up in the stroke better but made the rear shock feel soft , so if I kept this combination I would go up one on the spring rate , which it probably needs anyway and I would fit a gold valve in it as well so I can balance the combination . So the std k5 will have to give it front end back to it 450 brother , oh well . The std k5 is still a great bike , I just wish I had more time to try some of the 450 shocks , have anyone tried it yet , for fitment etc , I am so pushed for time at this time of the year it could save me some work , I might try one after the racing season over? The 15 forks are a improvement especially with the bigger brake as well , I think the std bike turns better with these 15 forks than the std ones.