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· Registered
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Discussion Starter · #1 · (Edited)
Just purchased a 2003 Rebel 250 for $300. Only has 600 original miles. Previous owner said “It made a lot of noise then quit running. Has been in storage ever since”.

initial inspection shows the driver’s right spark plug has the gap end beat up and bent.
Any ideas what I’m looking at as far as internal damage?
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· Super Moderator
1987 CMX250C AC
3,817 Posts
bore scopes and inspection cameras come at various price points and quality..
gives a peek at internal damage without removing head.
sometimes piston damage can be seen peering through plug hole using bright light.

Remove rocker cover, observe valve stem/train operation while rotating engine counter clockwise by hand.

are all stems rising the same amount? are any stuck?
Good time to spread a table spoon or two of engine oil on cylinder walls by adding it through plug hole.
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