I have a 1997 FC501 and it has a close ratio transmission. I was wondering if anybody knows if I can just change fifth and six gear or if I need to change all the gears? The reason for wanting to change to a wide ratio gear box is because the bike is daul sported and while going down the road to the next trail head the motor buzzes a bit at 50 mph. So I want to change it to be the same as my 1996 FE501 because that bike runs good and does not vibrate very much at 50 mph. So if anybody knows how and what gears must be changed to make this a wide ratio transmission I would appreciate it.