Friday 11 July 2014

Yamaha YBR 125 Top End Removal ( Cylinder barrel , piston and head )


ill ad captions later , but here is a post on removing the top end , cylinder head and piston from the Yamaha YBR 125 , quite easy even in the bike .



Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

                              Side timing chain cover removed  
Yamaha YBR 125 Top End
                    all main top end bolts loosened and  removed
Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End



Yamaha YBR 125 Top End
undoing the top cam bolt whilst holding the crank nut tight
slack off and remove the chain tensioning assembly
Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End
                      remove the timing gear but catch the chain
Yamaha YBR 125 Top End

Yamaha YBR 125 Top End
              I tie the chain so it not just falling into the lower section
Yamaha YBR 125 Top End

Yamaha YBR 125 Top End
                                  cylinder head  removed
Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End
       you may need to tap the cylinder in a few places to dislodge it
                                           use a soft mallet .
Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End
                  remove circlip knock out piston pin and remove piston
                                  job done and very easy to do
Yamaha YBR 125 Top End


Yamaha YBR 125 Top End

Yamaha YBR 125 Top End

Yamaha YBR 125 Top End


Check for damage and replace any suspect parts with new parts 



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