Page 2 of 2
Re: 98 KDX 200 lost compression
Posted: 08:16 pm Jul 29 2018
by KDXGarage
How many minutes is on that plug?? No color does not look good.
Re: 98 KDX 200 lost compression
Posted: 08:27 pm Jul 29 2018
by JakerB
Well, it just blew up again. Not sure what exactly happened but I’ll pull it apart and try and find out this week.
No, there wasn’t a whole lot of time on the plug.
Re: 98 KDX 200 lost compression
Posted: 10:35 pm Jul 29 2018
by John_S
Sorry to hear it blew again. If you can, do a leak down test before you tear it back apart. You likely will know why it blew up from that. The jetting you were running shouldn't be so dangerously lean. I'm thinking it had a good size air leak and if you find it now you can double check the same area with another leak down when it goes back together.
Re: 98 KDX 200 lost compression
Posted: 06:24 am Jul 30 2018
by JakerB
Yeah after blowing a second time I’m afraid that it’s got a decent leak.
Re: 98 KDX 200 lost compression
Posted: 02:51 pm Jul 30 2018
by bufftester
Yes, likely you have a blown left crankseal. Anytime you do a compression check or suspect engine issues you should also do a leakdown (on 2Ts) check as it is a better indicator of engine health than just compression alone.