I've gotten a couple PMs about how to do this, and it's fairly simple, so I figured I'd post a few pictures on how I did it. . .
Regular bars are low and a little narrow, and hurt my wrists.
First grab yourself a pair of these from Cycle-Gear or your local bike shop. They are pro-taper oversized dirtbike bar mounts. They're meant to mount onto dirt bikes so you can us 1.25" bars instead of 7/8". About half the threads will need to be cut off. Thread the bolt all the way on it, cut where needed with a cutoff dremel wheel, and then turn the bolt off the post to repair the start of the threads.
And a set of bars to fit them...
Now, I've done this to both of my X-18s, on one I used Diamondback light-bend mountain bike bars, and on the other I used pro-taper 1.25". Note in the picture below there's a textures knurled side for the clutch. You'll have the bars mounted reversed and upside down, so the clutch side will be the throttle side and vice versa. Take a sanding or grinding wheel and smooth it all out. If you don't your throttle sleeve will stick.
Next grab your drill and punch two holes into the stock triple-tree right where the little corner of the step-down is on the top plate. You will have to remove your gauges, otherwise the drill bit will hit the head of the gauges mounting screws and take material from them. I just took them off and reattached at the end.
Then take off the stock clip-ons.
Regular bars are low and a little narrow, and hurt my wrists.

First grab yourself a pair of these from Cycle-Gear or your local bike shop. They are pro-taper oversized dirtbike bar mounts. They're meant to mount onto dirt bikes so you can us 1.25" bars instead of 7/8". About half the threads will need to be cut off. Thread the bolt all the way on it, cut where needed with a cutoff dremel wheel, and then turn the bolt off the post to repair the start of the threads.

And a set of bars to fit them...
Now, I've done this to both of my X-18s, on one I used Diamondback light-bend mountain bike bars, and on the other I used pro-taper 1.25". Note in the picture below there's a textures knurled side for the clutch. You'll have the bars mounted reversed and upside down, so the clutch side will be the throttle side and vice versa. Take a sanding or grinding wheel and smooth it all out. If you don't your throttle sleeve will stick.

Next grab your drill and punch two holes into the stock triple-tree right where the little corner of the step-down is on the top plate. You will have to remove your gauges, otherwise the drill bit will hit the head of the gauges mounting screws and take material from them. I just took them off and reattached at the end.
