Leak down test
Posted: 10:25 pm Sep 28 2018
Hello everyone. So I've been fighting my 1990 KDX200 for some time now. I had a weird stall out that happened last summer and could never get the bike running again. Got it running again this summer, however, when going WOT for too long the bike starts to stall out and sputter until you roll back off the throttle.
I've went down several sizes on my main and have gotten no where.
I finally have gotten around to doing a leak down test. After getting the engine sealed up I can pump and pump and pump and never get it to hold pressure. If I pump fast enough I can get it up to about 4 psi or so but the needle drops quickly.
I've sprayed soapy water all around the exhaust plug and intake to make sure there's nothing going on there. Removed the magneto to get to the left side crank seal, no leak there. Tried listening for a leak from the transmission side and didn't see/hear anything. Sprayed the base gasket, head gasket, spark plug, nothing. The only area I've found any bubbles is coming from the seal on the right side of the kips shaft.
Part # 92049 is the seal in question. It doesn't even look like a seal, almost looks and sounds like metal. Maybe it's just super hard.
What effect if any would this have on jetting? And would it have that great of an affect on my leak down test? I would think it would be a slow leak if anything. Perhaps I have the piston in the wrong position?
I do know the tester works as I used it on my RD350 with zero issues. I'm about at my wits end with this bike.
https://www.kawasaki.com/Parts/PartsDia ... /KDX200-E2
I've went down several sizes on my main and have gotten no where.
I finally have gotten around to doing a leak down test. After getting the engine sealed up I can pump and pump and pump and never get it to hold pressure. If I pump fast enough I can get it up to about 4 psi or so but the needle drops quickly.
I've sprayed soapy water all around the exhaust plug and intake to make sure there's nothing going on there. Removed the magneto to get to the left side crank seal, no leak there. Tried listening for a leak from the transmission side and didn't see/hear anything. Sprayed the base gasket, head gasket, spark plug, nothing. The only area I've found any bubbles is coming from the seal on the right side of the kips shaft.
Part # 92049 is the seal in question. It doesn't even look like a seal, almost looks and sounds like metal. Maybe it's just super hard.
What effect if any would this have on jetting? And would it have that great of an affect on my leak down test? I would think it would be a slow leak if anything. Perhaps I have the piston in the wrong position?
I do know the tester works as I used it on my RD350 with zero issues. I'm about at my wits end with this bike.
https://www.kawasaki.com/Parts/PartsDia ... /KDX200-E2