Ah we thought you already did...



Seriously tho, the way to see if a bearing is shot is if the race is gritty, loose, noisy etc, not the amount of oil it leaks...

If it leaks a lot of oil, it may be because the engine has been run excessively with a bad bearing at some stage and the crankcase is worn...

The crankshaft sits in the crankcase with a very tight tolerance, it has to to seal the primary compression up through the rotary valve... if a back bearing fails (the usual but no always. first one to fail) the the crank wobbles in the crankcase and wears it away... that allows excessive oil to the front bearing where neither the rubber seals or the metal shields will hold it in...

Just look at any greased bearing with a rubber seal thats been run for a short while, they weap, the seals are not proper oil seals, they are there to keep dirt out...

However, once it gets to the state of the one you pictured, then the seal is no longer achieving that, and the dirt will quickly spoil the bearing race..

VTI-Chris, take the bearing with you, and ask for the same bearing of the best quality they have... If its rubber shielded, ensure you take the inner rubber shield off (pick out with a fine knife blade) if its metal shielded it will allow oil into the bearing anyway.