- May 23, 2000
Help! I just bought my son a 91 KDX and I'm having trouble trying to sort it out. It was supposed to be in excellent mechanical condition, but I've had to redo quite a few things that the previous owner repaired. He supposedly put new rings in last year, but there is a constant "grinding" sound coming from the engine as opposed to the normal kips sound. The bike runs ok, but it doesn't seem to have as much top end as my 1990 KDX. I'm wondering if he didn't put something back together right. Any idea's?