Hona CBR 125r exhaust

Any name brand 10W-40 synthetic or semi synthetic engine oil.

https://www.carlsalter.com/download.asp?p=1296

It does it its self via the cam chain tensioner. They do get stuck sometimes. Its easy to fix. Not so easy to explian. Get a manual

You can download this from:
http://motoservicemanuals.blogspot.com/2009/04/honda-cbr-125-service-manual.html

this new exhaust has thrown the engine way out of tune, and the carbs need to be re-set up as the bike is now running very week,,,,you will burn a hole in a piston very soon if you dont re-tune it,,,this could also be causing some if not all of the vibration your getting, but check the sprokets are running true life the rear of the bike clear of the ground and spin the rear wheel if you feel or here a grinding sound its the sprokets not meshing with the chain also did you have the new tyer balanced when it was fitted???
this also causes vibration

dude! it is not the same engine. these guys will help you. www.cbr125r.ca/forum/index.php Good luck!

if it is the the alternate of the cbr 900rr 1995 bike then replace it but i think , you'd better look for the alternate exhaust if it is cbr 900rrt even though but size matters.