Do I have the power ???
#2
I'm sorry to say, I don't think you will. I had a 99 Honda 300trx runing 25X10X12 and 26X12X12 Blackwaters on Douglus rims and I can not tell you all the times that I could not spin the tires even if my life depened on it. try to get the pipe, try to get as much power as you can from it. I took mine back to Honda after a month an got a FormanS 450.
#3
26" tires are huge. If you are determined to go with that size then I strongly suggest re-gearing it (smaller front or larger rear sprocket). I doubt the bike will be able to turn those to your liking.
Check www.sprocketspecialists.com
Check www.sprocketspecialists.com
#7