KK mowers are junk. At least that was my experience. I bought one new in July 2003 for $1000, it was a 60" side discharge. By the Spring of 2008 I had spent $800 on repair parts. Every spindle, idler, all the tires and wheels, plus many belts had been replaced. The gear box was the only thing I did not have a issue with.
It was very frustrating having it break and then having to wait days for the parts and to add insult to injury I had to pay my neighbor a few times to do my mowing.
I gave up and got a 72" rear discharge Caroni in the spring of 2008. I have lost one $0.20 bolt and that is it. It cuts great and has been so trouble free the bolt was lost because I never had to put wrenches to it. 3 great seasons with it now and I am sure many more.
The main issue to me with the KK was two areas. The tires are pneumatic. I have many dips in my yard and the little tires would roll off the rims tearing the valve steams. $300 for new tires solved that issue. I had them foam filled. The other issue is it used a long belt, had about 8 idler pulleys, and 3 spindles. Too many moving parts. My Caroni has 2 short belts and just 3 spindles. No idlers. The KK would have a idler start to go out and chew up a $50 belt in the process. So now you need a belt, idler, and freight so it quickly becomes over $100 to fix it each time this happens.
Anyway, run from KK.
Chris