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DRZ 400 wont start and exhaust smoke from carb

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hello last night i was for a ride and i noticed a reduced power on my bike then after 5 mins or less the bike stopped.i saw some few oil on the ground i though it was from junction box.(I run open box without air filter-airbox)

then i tried to start the bike and i saw lots of exhaust smoke coming from the carb and the bike would not start. everything sounded to rotate normal in the engine while i tried to start it.

i belive it has something to do with valves/timing/chain/tensioner.

what do you think ?

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2 minutes ago, Ruben Ruben said:

i found the reason ... 

IMG_20170622_184833.jpg

Is that the top of the piston? It was kinda hard to hear what exact noise you were talking about. The squeak or the pop at TDC?

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22 hours ago, Ruben Ruben said:

yea as you can see piston is cracked in half i guess it burned all the oil and the bike got &%$#@!ed 

Ohhhh shit!!! I just saw the crack. Jesus. That sucks.

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i got the athena 434 kit installed. dont know why that happened i revved the shit out of it 2 days before

forgot to say i had a problem with overheating dont know why the bike puke some coolant like 100ml or something and i got a 1.8 bar radiator cap

Edited by Ruben Ruben

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It looks like a valve contact spot in your picture , upper left valve , spot is near the center of picture up there.  Odd that the piston would crack with just overheating or lack of oil , worst that should happen is melting the edge around to top ring groove or full seizure , piston still shouldn't crack . What brand piston came in that kit ?

 

 

.

Edited by jjktmrider
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