Odd stalling issue

Discussion specific to the 1989 - 1994 (E Series) KDX200 model sold in the USA
90SDKDX
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Re: Odd stalling issue

Post by 90SDKDX »

I just had a moment of possible clarity. When I removed my air filter to try starting without it I noticed the bottom portion looked a bit more saturated then the rest of the filter. I wonder if I over oiled the filter at the end of last year and that's causing an issue. Obviously it would be rich but again not sure how this would have caused an issue on the trail, but been fine when I got home, and now again causing an issue.
90SDKDX
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Re: Odd stalling issue

Post by 90SDKDX »

Took a quick look in my muffler and didn't see anything out of the ordinary. Going to try cleaning my air filter again and see if it helps at all.
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Re: Odd stalling issue

Post by david »

90SDKDX wrote:I just had a moment of possible clarity. When I removed my air filter to try starting without it I noticed the bottom portion looked a bit more saturated then the rest of the filter. I wonder if I over oiled the filter at the end of last year and that's causing an issue. Obviously it would be rich but again not sure how this would have caused an issue on the trail, but been fine when I got home, and now again causing an issue.
That's normal as gravity pulls the oil to the bottom of the filter, and shouldn't be causing a 'no-start'.
'81 KDX 175
'90 KDX 200
'07 Vulcan 2000 Classic LT (totaled 4/25/15)
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90SDKDX
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Odd stalling issue

Post by 90SDKDX »

Well got the filter cleaned and tried kicking her over. No change, which I didn't imagine there would be. At this point I'm leaning towards motor work. Even though my compression is good I may have a blown deal somewhere. I don't think there is anything left to check otherwise.
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Re: Odd stalling issue

Post by KDXGarage »

vacuum test / pressure test
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Re: Odd stalling issue

Post by 90SDKDX »

I'm going to try changing the plug one last time before I condemn the motor. I'm thinking if it got wet with gas a few times it may be too fouled, even though it looks new and sparks when I test it.
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Odd stalling issue

Post by 90SDKDX »

No change with new spark plug. I think it may be time to tear down the motor and do some further inspection. Not sure what else could be the problem if I have fuel, air, spark, and compression.
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Re: Odd stalling issue

Post by 90SDKDX »

Let me ask a question. I know that typically if a bike has a worn/broken piston ring it will cause low compression, but is it possible for it to somehow cause high compression? I've seen on a couple of online searches that people have had piston rings break causing the bike to bog out, die, and not restart.
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Re: Odd stalling issue

Post by david »

90SDKDX wrote: but is it possible for it to somehow cause high compression?
Nope
'81 KDX 175
'90 KDX 200
'07 Vulcan 2000 Classic LT (totaled 4/25/15)
'82 Honda GL500 (sold)
'96 ZXi 1100 JetSki
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Re: Odd stalling issue

Post by KDXGarage »

Have you read any on a pressure and vacuum test before engine disassembly?
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Odd stalling issue

Post by 90SDKDX »

I have. It's a matter of finding the correct tools to make the leakdown kit. I really don't want to buy the expensive motion pro kit.
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Re: Odd stalling issue

Post by KDXGarage »

Where are you located?
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Odd stalling issue

Post by 90SDKDX »

Western South Dakota.
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Re: Odd stalling issue

Post by KDXGarage »

OK, way far away :grin:
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Re: Odd stalling issue

Post by bufftester »

You can make a leakdown tester kit with common parts from your local auto parts store, plenty of youtube vids/websites showing how. Hardest part is blocking off the intake/exhaust. And for the love of all things holy don't use an air compressor to pump it up. I usually go to 5 psi for 5 minutes.
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Re: Odd stalling issue

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