Cylinder Wall Damage SX 125

Zalev
Posts
173
Joined
12/27/2016
Location
Glogow PL
4/22/2021 12:22pm Edited Date/Time 4/22/2021 7:04pm
This cylinder was replated 20h ago, what could cause that?


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sandman768
Posts
5958
Joined
3/21/2014
Location
Saratoga Springs, NY US
4/22/2021 12:30pm
Pull it apart & find out, need to inspect piston and upper & lower crank bearings.
1
pete24
Posts
2733
Joined
10/20/2011
Location
Marlborough, MA US
4/22/2021 3:41pm
is that aluminum stuck on there or is it a gouge? theres also a lot of wear on the exhaust port i think it dirt related
1
Mx746
Posts
533
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11/30/2010
Location
Marietta, GA US
4/22/2021 7:04pm
once you pull the jug you may find a chunk of ring missing if it spun and caught the port, as mentioned above, if gap is too tight, as the heat causes rings to expand the ends touch, the ring continues to expand and walk out of the groove, it can then migrate over the locating pin and turn, and catch a port.

The Shop

Zalev
Posts
173
Joined
12/27/2016
Location
Glogow PL
4/22/2021 11:04pm
pete24 wrote:
is that aluminum stuck on there or is it a gouge? theres also a lot of wear on the exhaust port i think it dirt related
Pipe is leaking a bit where it connects to the engine, I was using pressure washer pretty hard at this place, maybe some dirt went into the cylinder that way..

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