yabadab

What about getting a whole new back wheel from a bike like gasgas or a rear 18 wheel from the montesa and putting it on the bike?

I was thinking about using a crf150r as a trials and trails bike. I like to sit and ride sometimes on trails and I am a newbie (relatively) to trials riding, so I don't think I am going to be doing any outrageous rock climbing anytime soon. I was looking to try and find trials type tires that would work on the bike. The crf150r expert has 90/100-16 in the back and I believe 90/100-19 in front if I am not mistaken. Any help or advice would be greatly appreciated. Also, any thoughts on changing the spocket a tooth or 2 to increase torque a little? Thanks!