Reply to thread

Message: [QUOTE="phranticness, post: 1015882, member: 66089"] K gotta question for ya fella's. I just rebuilt the top end on my 99' kx 125, It runs great, I went through a full day of break in. I noticed last weekend, after the previous day of break in, an odd rattle from the moter. Under moderate load, Slightly after the powerband begins to kick in(probably when the exhaust valve opens) a ting type noise, almost like pinging but it only lasts for a second or so. when I had the top end apart I noticed the exhaust valve seems to have a little excessive clearance. The noise could be ratttle from the pipe springs, I'm just not sure. I read that 98' kx's had a problem with the power valve hitting the piston but that was resolved in 99'. This noise sounds very simular to pinging, but does'nt have the duration of spark Knock. Any thoughts? I appreciate any imput.................................happy trails [/QUOTE]