front sprocket nut removal
 

I am trying to change the front sprocket but the nut is frozen on. I tryed a breaker bar with a 2' long pipe over it and it would not budge. I have seen 5 You-tube videos with guys having the same problem. One guy actually cut the nut off. Anybody have a similar problem? What would be the best way to try and remove the nut?

You can use heat but be careful to just heat the nut and not the shaft, heat and pb blaster

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I had one that took a 1" drive impact wrench with 200 psi in the line. Most of the time, an overnight soak in PB then a little heat around the outside of the nut and a regular impact will do.

Use an impact wrench. It could take up to a few minutes with constant impacting to get it to break loose, but it will eventually come off.

I had to cut mine off with an air cutoff tool. There are about 7 You tube videos with guys having a problem getting the nut off. 4 were zx-14s. 2 guys had to cut the nut off. One was a mechanic at a bike shop. I bought a new one and found that a standard 27mm socket slips when you apply torque. This is the strangest nut I have ever seen. The edges are rounded off. So no standard socket will fit. However you can buy a socket off of e-bay that will fit. It fits the end nut and the 27mm nut at the same time. Price- an outragious $50. There is a You-tube video on a guy showing the one he had to buy. It would be interesting to talk to a Kawasaki engineer to see why they would design a nut like this.
If I ever had to do this again , I would buy a Suzuki nut. It is a standard type with pointed ends.