Friday, 25 July 2014

Yamaha YBR 125 Top End Rebuild









Yamaha YBR 125 workshop manual

Buy now 








Make sure barrel and piston are in good working order ,

I use these Barrels and these pistons  , make sure you hone the barrel before starting this job .




First block the cases , as dropping something into the bottom of engine now would mean stripping it all out again .

Believe me i have done , and thought all would be fine , and it cost me a  lot of money to find
out otherwise . ( never again ) if something drops in the engine strip in out !!


Yamaha YBR 125 Top End Rebuild

fit pin and circlips 

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

hone barrel if not already honed 

Yamaha YBR 125 Top End Rebuild

fitting cylinder over the piston rings , oil may help this part 

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

pull chain through 

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

setting up timing marks on the upper chain gear 

Yamaha YBR 125 Top End Rebuild

fit tensioner 

Yamaha YBR 125 Top End Rebuild




Yamaha YBR 125 Top End Rebuild


Yamaha YBR 125 Top End Rebuild

setting the torque of the cylinder head nuts  

6mm 10nm . 8Nm 22Nm

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

fit the flywheel , make sure chain stays on behind it 

Yamaha YBR 125 Top End Rebuild

timing marks on the flywheel 



Yamaha YBR 125 Top End Rebuild

timing marks on upper chain gear 

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild

Yamaha YBR 125 Top End Rebuild




see more Yamaha YBR 125 blog posts 



thanks for reading the Yamaha Owners blog , if you would like to support us you can by  buying your newYamaha YBR 125 off ebay uk here or buying  parts for your yamaha YBR 125 from ebay uk here


No comments:

Post a comment