Engine smoking

[dcd1979]

Hi I have a vulcan 125cc custom bike which I am lead to believe is an identical engine to honda cg125, I have recently replaced the barrel and piston and on running the engine it seems to be burning oil and I can see it dripping from the exhaust, what are the chances it's the stem seals rather than anything more serious? Thanks in advance

[Pete.]

More likely that you have fitted the piston rings upside down.
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[dcd1979]

[Pete.]

Some have marks, some don't , some are orientated, others aren't.
____________________
a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[dcd1979]

[grandad90]

normally tiny little letters on the topside of the rings?

[RhynoCZ]

It could well be the seals in the head. Was the head alright before you did the job? When running in an 4 stroke engine, some oil will be burned, but not that much it would drip from the exhaust.
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'87 Honda XBR 500, '96 Kawasaki ZX7R P1, '90 Honda CB-1, '88 Kawasaki GPz550, MZ 150 ETZ
'95 Mercedes-Benz w202 C200 CGI, '98 Mercedes-Benz w210 E200 Kompressor

[dcd1979]