Posts: 88
Joined: 8/29/2018
Location: Union Bridge, MD USA
I started working on this yz125 and found it had spark with brand new sparkplug. Compression seems sorta low but upon checking the intake into the crankcase I found all these not so much shavings but pieces or chunks of metal and I opened the combustion chamber open and it seems to be intact. Any ideas? 
Posts: 88
Joined: 8/29/2018
Location: Union Bridge, MD USA
Posts: 609
Joined: 5/1/2018
Location: Grand Terrace, CA USA
Posts: 4301
Joined: 8/26/2006
Location: FL, USA
Looks like cast material, meaning piston. That one sneezed hard to blow all that material back through the reed petals like that.
Posts: 5567
Joined: 1/31/2018
Location: Mansfield, OH USA
Posts: 6220
Joined: 11/16/2011
Location: Menifee, CA USA
Broken pieces of piston. Take that whole cylinder apart and inspect for damage.
Braaapin' aint easy.
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Location: Saratoga Springs, NY USA
Posts: 683
Joined: 9/17/2018
Location: AUS
Posts: 88
Joined: 8/29/2018
Location: Union Bridge, MD USA
