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6/5/2015
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Broken Arrow, OK
US
mikeandnora
2/13/2019 7:02am
2/13/2019 7:02am
Edited Date/Time
2/13/2019 12:02pm
Just bought 2002 CR125 that was bored to 134 and then replated.
Developed a leak at a head bolt, so popped the head off to swap the gasket. I potentially have a warped head, and I know the deck at the exhaust end of the cylinder is weak anyway...so I'm still looking at that.
What I'm wondering is...is it normal to have a very localized pitting area in the cylinder? Yes, drag a fingernail and it's enough to grab...but only in this one area (about 9 o'clock if looking from intake).
If the cylinder was bored/replated/bored, then had about 7 hours of riding since the work was done, how does localized pitting show up?
Any answers will be appreciated.
Developed a leak at a head bolt, so popped the head off to swap the gasket. I potentially have a warped head, and I know the deck at the exhaust end of the cylinder is weak anyway...so I'm still looking at that.
What I'm wondering is...is it normal to have a very localized pitting area in the cylinder? Yes, drag a fingernail and it's enough to grab...but only in this one area (about 9 o'clock if looking from intake).
If the cylinder was bored/replated/bored, then had about 7 hours of riding since the work was done, how does localized pitting show up?
Any answers will be appreciated.
https://www.millennium-tech.net/vidplayer.php?id=34
Just seemed weird that it is so localized.
I didn't own the bike when the work was done, so I'll just use this as my baseline I guess.
I appreciate the response.
The Shop
Yup...forgot all about that way to check....
Definitely sleeved.
Buyer beware. Do complete engine teardown when buying a used bike...haha.
Funny the shop did a 134 kit on it...
On top of all that, I've determined it's a sleeved cylinder.
Was not expecting that when I popped the head off.
Surprise, surprise, surprise...
Post a reply to: 2002 CR125/134 'localized pitting' in cylinder...normal?