Salam to everyone
I own a 1983 Yamaha 550 4 Cylinder, I discovered a knock in the engine & later decided to dismantle it & fix it, Upon inspection the plane bearings on the 4th cylinder connecting rod had spun.
Now after searching around for possible repairs, The best thing that could be done to repair the engine is to grind down the crank & get oversized bearings.
Now what i needed to ask is, if there are any machine shop's that grind down the crank to factory specs here in karachi? & also if anyone has ever done this type of repair? & if have done so, how long did the engine last on you?