Other KLX140l throttle grip install

I just got a 2014 KLX 140L and need to change the grips, i got the left grip on just fine but when i went to cut the throttle grip off I noticed it looks to be attatched to the throttle tube. I cant return the grips as i put one on already is there a way to reuse the tube or will i have to purchase a new one? And will i have to get different grips to fit that tube? The grips i bought are ProTaper 1/3 waffle grips
 
When grips are glued on they sometimes come off more difficult on the throttle side as its plastic and not metal, you'll just have to shave the grip off the plastic tube with a knife or razor and then sand it smooth to finish.
 
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