I did it myself on my Zx3. It lasted to 127keep but when I took it off the timing belt had a hunch of cracks, hugh.... it is good now, runs like a champ. I got the Gates timing kit with both pulleys and hot the aligning kit from Amazon for about $20, it was a 5 hour job. And at that time I ganged the crank pulley to a light weight one.
Sent from my SCH-I535 using FF Mobile