Wow, a whole bunch happened here while I was sleeping!
So once I bore my jugs to fit m1000 pistons, what else do I have to do to my motor to make sure everything runs perfect! such as power valves, heads?
Like Mike, Kiliki, Idcatman3 and I have said everything has to be matched to the new bore size.
1. and can I run High comp heads on the m1000 bore?
Yes, you have to use higher octane fuel and make sure you have enough clearance between the piston and the head to prevent detonation.
2.Also will this effect the durability of the motor? sense I will have smaller cylinder walls?
The 900 cylinders have plenty of metal in the walls to allow for a bore job. The biggest problem is the inner head o ring as I talked about in my first chime on this thread. That is where the size limitation comes, in my opinion.
3.will my computer be able to handle this bore?
nope
4.do you know off the top of your head the HP gain on 75 more cc?
will i be able to notice a difference when I go to ride it again with a 975cc?
Horsepower gains will depend a lot on the port work done after boring. If you just bore the cylinders and don't do any port work you probably won't notice any difference at all. A couple years ago I rode with an 800 cat that had a 1010 kit in it. It ran just about like a good 600. I think he started with 800 cylinders and didn't do any port work. When you bore the cylinders the ports become smaller relative to the bore size than they were originally. I cut them to bring them back to the same relative sizes as before. Some engine builders will cut them even more to go for maximum power. I am willing to settle for a little less max power in exchange for reliability and ease of tuning.
I hope this helps. This is about as much fun as I have had here for a while.