Been riding xs's on and off for over 20 years and just got back into them about 5 years ago built 3 and all have the same problem.I"m always trying to shift into 6th gear. When I first got back into them I remember taking my 77 out riding with bro inlaw and sis. When we got on the highway I thought I was going to blow the motor and my license plate cracked and was hanging by a thread. With a fine tuned xs you really need a sixth gear. Right now I"m running 17/30 which is bearable but no more getting the front end off the ground and the power band becomes a little funky.I'm forty years old and by no means a speed demon on public roads, but with speed limits in some areas set at 65 or 75 it's a pain to keep up with traffic,I try to stay off the thruway et but sometimes it's just hard to avoid. The only thing keeping me from trying an 18 up front is having to remove the guide which leaves your stator wires within dangers reach.Was wondering what you guys where doing and I know mikes has a 5th but I hear it's not worth the trouble.I don't mind tearing it down if there's some way to redo the whole transmission.