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kdx220rwheel
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blew up

Post by kdx220rwheel »

just ran across some videos about a 2 stroke blowing up and all the videos sound exactly the same of what my bike did do I really have to re build the whole motor or just the top end get a new piston rings etc.?
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diymirage
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Re: blew up

Post by diymirage »

im confused

I thought you mentioned you took the cylinder off and inspected everything ?
that should have told you the extend of the damage


I think its time for some pictures of the piston and the bore
newbbewb wrote:DIYmirage has it right.


-1996 KDX 200 woods weapon (converted to 99 green body)
-1996 KDX 200 plated street toy (barney edition)
-2003 Yamaha TTR125-L (wifeys bike)
-1997 KDX 220 project bike
kdx220rwheel
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Re: blew up

Post by kdx220rwheel »

I did ill post some today and everything looks just like it came out of the factory cylinder is checked no scoring not scratches no chunks taking out of the walls or ports rings are light brown tint just like the top of the piston but every video I watched sounded exactly like what happened :partyman:
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diymirage
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Re: blew up

Post by diymirage »

generally when a top end blows there is serious carnage

now, when it overheats like mine did (you said that didn't sound nothing like yours though) then it might look like you described

can you still turn the engine over ?
newbbewb wrote:DIYmirage has it right.


-1996 KDX 200 woods weapon (converted to 99 green body)
-1996 KDX 200 plated street toy (barney edition)
-2003 Yamaha TTR125-L (wifeys bike)
-1997 KDX 220 project bike
kdx220rwheel
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Re: blew up

Post by kdx220rwheel »

yes sir engine has no marks of seizsure has exelant compression turns over just fine
kdx220rwheel
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blew up

Post by kdx220rwheel »

I remember now that when I ran it with the fuel on it would flood its self out as herd at the end of this video of my bike and idk if this would have anything to do with the motor doing what its doing
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bufftester
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Re: blew up

Post by bufftester »

If it sounded like the end of that video, that is when he hit the kill switch. Are you sure you have spark? how did you check the spark? If a 2T blows up, you know when you pull the cylinder off. From the few contradicting pieces of information you've given it sounds as if maybe you have an ignition (CDI/Coil) problem. Have you actually gone through the checklist of items that has been posted several times? Photos?
kdx220rwheel
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Re: blew up

Post by kdx220rwheel »

photos will b uploaded soon an yeah everythings check an I took the spark plug out but left it in the coil wire an left it dangling beside the cylinder an quickly kicked it with my hand an seen spark off of the spark plug every time I kicked it...it had plenty of spark
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