First stick a nail(or screw driver) between the handle bar and handle grips than get about three pinches of sand or dirt in-between the two after that take the nail out and twist and pull and it should come out.
One example on how to remove a motorcycle accessory is how to replace motorcycle handle grips. This can be done by removing the bar ends, cutting off the grips, cleaning the handle bars and installing the new non-throttle and throttle grip.
The stem of a bicycle can be made from alloy, carbon or titanium.
Heres a UTUBE on it http://www.youtube.com/watch?v=bQ7nyMRnBIM
it may be a snug fit but it is doable
My bike grips
you take the normal grips off and shove the new ones on.
No. Grips and handlebars are fairly well standardized, so pretty much any grip will fit.
yes
Use An Air Compressor!
bike handle bending process
If the bike is ever ridden on public streets/in traffic removing brakes is a really bad idea. But if you insist, this is the general instructions on how to do it: Unclamp brake wires from brake arms, remove crimped-on end caps, pull wires out. Follow cable from brake towards handle bar to locate any other place they're connected, undo those too. Unbolt brakes from bike. Pull grips off handlebar and remove brake levers, put grips back on. Removing (parts of) the detangler requires pulling the fork, which is another issue.
Depends on the diameters of the bars. Usually, but not always, they're the same and can use the same grips.