Yamaha YBR 125 workshop manual
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Just done a tappets adjustment on and engine i have removed , ill be fitting the engine soon so ill take some photos of this as i go along .
this ids a very easy job with engine out or in .
make sure you change the o-rings you might get away with it but more often than not no and oil will leak
especially around the cam sprocket cover and drip onto exhaust causing excess smoke .
Need parts or tools try here UK
or Here in USA
change all O-rings
use a good fitting tool to avoid damage to
directly onto exhaust
srpocket ( white marks ) ive painted them white but manufacturer markings
are easy to see
make sure lower marks are aligned buy viwing in inspection window
then make sure you have free play in both rocker arm
to ensure you are a TDC on compression stroke (valves closed )
easy now just check every thing is tightened to specs and turn engine over a couple of times
make sure things go smooth and fit inspection covers changing orings .
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