Blew Something up

[XtremeYFZ450]

I was in Dumont this weekend and let my buddy ride my shee and the engine just stoped. I could start it and it would idle for a bit then die but the sound it made was like something locked up (thunk sound). It still starts eveytime I kick it over but for only a few seconds before it stops again. I checked the oil and it has some metal flakes in it so obviously something is broken. I have never worked on 2 strokes before and was wondering if it's possible to have spun a main bearing? Just wondering if anyone has experience this what it could be and If Im going to have to rebuild the bottom end what mods / upgrades would you do. Any help would be appreciated.....

[joshv5.0]

I was in Dumont this weekend and let my buddy ride my shee and the engine just stoped. I could start it and it would idle for a bit then die but the sound it made was like something locked up (thunk sound). It still starts eveytime I kick it over but for only a few seconds before it stops again. I checked the oil and it has some metal flakes in it    so obviously something is broken. I have never worked on 2 strokes before and was wondering if it's possible to have spun a main bearing? Just wondering if anyone has experience this what it could be and If Im going to have to rebuild the bottom end what mods / upgrades would you do. Any help would be appreciated.....

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you need to take the top end off and inspect it for damage, before you tear it up any further

 

do this and then report back

 

btw 2 strokes are possibly the easiest thing you could ever work on, no timing chains or cams . once you take it apart its nothing

[Timmy301]

could be a broken gear

"c"-clip may have came apart and spun through some gears

you will never know untill you take it apart

[Leadfoot350]

check the compression before taking it apart

[XtremeYFZ450]

Thanks guys....I'll check the compression before tearing the bottom end apart and report back.