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03 CR 125 knocking?

Joined
Oct 25, 1999
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#1
Hi a friend of mine just bought a used 2003 CR125 with an fmf pipe and v force reeds with 12 hours of riding on it.
When he got it home and rode the bike we can hear this loud knocking sound from the engine especailly at higher rpms the bike doesn't seem like it is running lean but he did buy the bike up north what do you guys think it could be jetting or a engine rebuild! Did the dealer rip him off?
 
Joined
Jul 22, 2002
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#3
my 02 made some nice loud klanks especially noticeable at lower rpms with the stock piston and even a little with a wiseco. It made more noises when the crank bearings went south (had gone through a coupla wisecos pistons by then)
 
Joined
Oct 25, 1999
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#4
Ya the bike still has the stock piston and i rode the bike again and I notice to more a lower rpm too but I think the is more then 12 hours is getting close to a new top end.