[kevenenfield]

Hi everyone!
I bought my Bullet 500 1994 this spring. I started riding it few weeks ago. The last owner had not use it for 4 years. The bike is now loosing quite a lot of oil around what looks to be the crankshaft. I do wonder if any of you have already change the crankshaft seal? I'm new is this mechanic world (which I like) so there is few things I do not catch by now: does it has something to do with the Bullet wet sumping? I tried to search different information on internet but have not found any....

Thanks for you help!

Keven

[ace.cafe]

The crankshaft seals are all inside the engine. You can't see them externally.
So we need you to tell/show us where the leak is.

[Adrian II]

There's some useful reading here, courtesy of a UK Royal Enfield specialist:

http://www.hitchcocksmotorcycles.com/technical-notes

Much of the information there will be relevant to your '94 model, including the section on Bullet wet sumping.

I suggest you give the engine, gearbox, primary and underside of the bike a really good clean, so that when it starts to leak again, you can see EXACTLY where it's coming from.

A.

[Arizoni]

Keven
As you say the leak seems to be around the crankshaft I will assume you are looking at the cap on the right hand side of the motorcycle that is in line with it.

This cap (oil plug) is actually the part that delivers oil from the oil pump into the crankshaft.  From there, the oil travels thru drilled passages to lubricate the connecting rod bearing.

As the oil is under some pressure, any small leak in the gasket (Hitchcock calls it a washer) under the cap will leak down the side of the engine.

If this guess is correct, remove the cap and examine the gasket (washer).  If it is in good condition, apply a thin coating of a oil resistant gasket seal like Permatex Ultra Black to both sides of it and reinstall the cap.

http://www.all-spec.com/products/82180.html?gclid=CNj43rqdlcYCFUprfgodT7YAIQ

That should fix the leak while it leaves the cap easy to remove at some future time.

[kevenenfield]

I do appreciate all your precious replies!
Actually, the leak is next by the front sprocket (on the left side of the bike). It is hard to tell if it is leaking on the side of  the primary or on the right side of the sprocket (crankcase ?) because it leaks most once riding. I guess it as something to do with the seals. If so, where can I find the seals stopping the oil  from outside on the shaft?
Thanks again

[High On Octane]

It might just be the seals in the primary cover leaking.