engine knock on deceleration
Posted: 10:11 pm Sep 22 2007
Hey folks!
I was about ten miles into a ride today when the ole KDX developed a relatively loud engine knock on deceleration. I didn't hear the knocking anywhere else . . . just above idle upon slowing down. Since my son and I were near a trail head, I took his bike back the 10 miles and got my truck. I wasn't brave/foolish enough to ride 'er the ten miles back to truck. In the brief period when I was trying to figure out what was going on I didn't notice any drop in power - just the knocking as I slowed to go into corners.
My '05 KDX has about 3500 miles on it and I've not even peaked inside the engine yet. (Well, I look up the exhaust when I replaced the pipe but didn't see much.) I had planned to replace the top end in November after the last HS of the season. I'm hoping a top end will do it but I wanted to ask what I might specifically look for as I open her up in the next few days. I have recorded compression tests periodically and I thought I do that before I started to tear it apart. I also thought I'd put a stethoscope on it to see if I could hear just where the noise might be coming from although I'm a little uneasy about running the engine too long.
For the sake of completeness, I did overheat the girl a couple weeks back in a HS - she puked out quite a bit of fluid. I had a 40 mile ride on her last week though and I didn't detect anything unusually.
Any words of wisdom would be appreciated!
Kirk
I was about ten miles into a ride today when the ole KDX developed a relatively loud engine knock on deceleration. I didn't hear the knocking anywhere else . . . just above idle upon slowing down. Since my son and I were near a trail head, I took his bike back the 10 miles and got my truck. I wasn't brave/foolish enough to ride 'er the ten miles back to truck. In the brief period when I was trying to figure out what was going on I didn't notice any drop in power - just the knocking as I slowed to go into corners.
My '05 KDX has about 3500 miles on it and I've not even peaked inside the engine yet. (Well, I look up the exhaust when I replaced the pipe but didn't see much.) I had planned to replace the top end in November after the last HS of the season. I'm hoping a top end will do it but I wanted to ask what I might specifically look for as I open her up in the next few days. I have recorded compression tests periodically and I thought I do that before I started to tear it apart. I also thought I'd put a stethoscope on it to see if I could hear just where the noise might be coming from although I'm a little uneasy about running the engine too long.
For the sake of completeness, I did overheat the girl a couple weeks back in a HS - she puked out quite a bit of fluid. I had a 40 mile ride on her last week though and I didn't detect anything unusually.
Any words of wisdom would be appreciated!
Kirk