How much does it cost to rebuild a cr 125 motor The top end and bottom end?

it costs about 230 aud for a wiseco crankshaft on ebay

about 130 aud for a wiseco piston on ebay

both come with gasket sets

if you're paying a motorcycle shop it

will be about 500 aud labour

but if you're doing it yourself then only

the cost of the crank and piston

all thoughh.. you may need to bore, re-nickle,

hone, or re-sleeve your cylinder.

prices vary for all above.