Hello , i am new to this forums and im trying my luck. Maybe someone here may shed some light on what i am encountering right now.

Before i bought this bike , i havent checked the oil , later on i found out there was no transmission oil and i already used it for like 60 kilometers...
Then after putting 650ml of engine oil , this happened the next time i used the bike the moment i turned off the engine this came out from the left side of the engine.



All oil came out , but this leak doesnt happen when the engine is not running.

So i opened it up and found out that all seals are busted and that clutch pushrod oil seal is not the proper seal for this bike i guess it was taken from the Yamaha RS100 with a bigger pushrod hole :



I replaced all the oil seals , replace the shift shaft because it was welded in place , put the proper circlip and washer for the shift shaft oil seal. I also replaced the front sprocket oil seal but im not sure if i did replace everything back together in the right order .

I also replaced every gasket , i bought an overhauling gasket kit that contains all the gaskets of the engine, fixed the right side cover leaks and the oil pump leaks and it also contains the crush washer for the oil drain bolt , it also fixed the small leak there.


So i wrapped that o ring around that bushing, i noticed that my bushing is somehow damaged , warped and have irregular grooves and maybe thats the cause of the oil leak?


More pics here


That part where there is black oil is not the magneto oil seal , there is a cracked part in my left side cover that lets the oil from the chain splash through the magneto.



More pics.

Also i noticed that when i wiped my chain clean with no oil , then after using the bike , the chain becomes covered in oil like it has been lubed but i didnt.


Now if someone could manage to get a pic behind that sprocket where the bushing and o ring is located and compare yours to mine , maybe it will solve my problem once and for all . Thank you