Chris Stewart Posted July 9, 2020 hey everyone i’m new and thought i would give this a shot to see if anyone could help me. i have a 2011 kx 450 leaking oil from cylinder weep hole. i replaced the spark plug gasket under the valve cover but it still leaks. could it be the o ring under the cam caps? oh and when i went to replace the spark plug gasket there was about an inch of oil in my spark plug cavity. i vacuumed it out took off valve cover and replaced gasket. still leaking please help. also does anyone know spark plug socket size i tried 5/8 but it’s a little small. sorry for the long type Share this post Link to post Share on other sites
kxlubber Posted July 9, 2020 There’s the plastic cap on the spark plug well and an Oring in there too. Share this post Link to post Share on other sites
Chris Stewart Posted July 9, 2020 do you have a picture or part number for reference? Share this post Link to post Share on other sites
Chris Stewart Posted July 9, 2020 (edited) the one i replaced under the valve cover was rubber not plastic it was a circle with like a lip on each side Edited July 9, 2020 by Chris Stewart Share this post Link to post Share on other sites
kx450f06 My Rides (2) Posted July 14, 2020 On 7/8/2020 at 8:51 PM, Chris Stewart said: the one i replaced under the valve cover was rubber not plastic it was a circle with like a lip on each side On my 06 the o ring under the cam bridges is the one that is the problem maker for leaking oil out the weep hole. I've replaced it a number of times. I prettty sure it's the same design. Share this post Link to post Share on other sites
Chris Stewart Posted July 14, 2020 hey thanks for the reply. do you take your cam chain tensioner out or just screw it all the way to the right?mine is just a drop here and there. hardly noticeable i just can’t stand it lol would you worry about it ?or should i just replace it when i do a top end rebuild in a couple months Share this post Link to post Share on other sites
kx450f06 My Rides (2) Posted July 15, 2020 19 minutes ago, Chris Stewart said: hey thanks for the reply. do you take your cam chain tensioner out or just screw it all the way to the right?mine is just a drop here and there. hardly noticeable i just can’t stand it lol would you worry about it ?or should i just replace it when i do a top end rebuild in a couple months If it's just a drop now and again maybe not. Did you say earlier your spark plug cavity was full? If that keeps happening I would fix it. Yes I just loosen cam chain up from screwing the interior of the cam chain tensioner and lift up the cam bridges enough to slip a new o ring in. And if nothing moved it doesn't need retimed. Share this post Link to post Share on other sites
Chris Stewart Posted July 15, 2020 yeah it was ridiculous how much oil was in the cavity but since i replaced the gasket under the valve cover it hasn’t pooled up... yet . i’m gonna ride a couple more times and check again. waiting on my torque wrench now. thanks for the advice man Share this post Link to post Share on other sites
kx450f06 My Rides (2) Posted July 15, 2020 11 hours ago, Chris Stewart said: yeah it was ridiculous how much oil was in the cavity but since i replaced the gasket under the valve cover it hasn’t pooled up... yet . i’m gonna ride a couple more times and check again. waiting on my torque wrench now. thanks for the advice man Ya no problem. Share this post Link to post Share on other sites
