Hi thereAll I did to remove the stock bar ends from my 2014 Ninja 1000 ABS was use a 1/4 socket, inserted a #3 phillips head bit into the 1/4 socket and I was able to bust the Loctite lose. Replaced the bar ends with HVMP stainless steel bar ends that weigh 13.9 oz. each. The weight of the bar ends helps to absorb the kinetic energy that is transmitted to the bars which can over time cause discomfort in the hands. This is a product that I have used on the last three Kawasaki's that I have owned.
Didn't use any heat or lubricate or WD40, just put some *** into it. All Kawasaki's are pretty much made the same. The weighted bar ends that I mentioned all fit my 2004 ZZR1200, 2006 ZZR600 and my 2008 Ninja 250R. All of the bikes had the same old phillips head screws with Loctite. There's probably one guy at the Kawasaki factory in Japan that puts a ton of Loctite on each bar end screw just because he knows some American will try and unscrew it..........
Kawasaki bar ends
Just to bring this one full circle, the stock ends are 1.5" long and weigh 10.15 oz.I asked HVMP the same question.
The 13.9 oz bar ends are exactly 2" long.
I haven't measured the stock bar ends yet, but I can't imagine that these are much more than a 1/4-1/2" longer.