Final drive leak

[herbie]

Just been looking the bike over and have discovered a leak from the final drive bevel box. Oil is driping out and smeering the rear rim. No, it's not from ther drain plug!

Can new seals be fitted by the home mechanic (me) or is it a no no, like both my manuals say?

If so, the most economical option is probably a used replacement.

Herbie.

[bkr]

Rear End Leak

Hey herbie You can replace the rear seal but be very careful how things come apart, also check to make sure you do not have too much lube in your rear end. Doyou have a proper DIP STICK ? bkr

[herbie]

Hi BKR,

thanks for the reply.

If you can replace it (the seal) do you know how to go about it because both my manuals (Haynes and Clymer) cop-out and say the "take it to your nearest dealer" thing.

No, it's a leak good and proper. Got the dipstick and the oil is down a bit now...

Herbie.

[bkr]

Rear Seal

Morning herbie The best way to replace the seal is remove the rear end from the swing arm. This way you can lay it flat to work on. Mark both pieces ( punch , file mark ? ) remove 10 nuts and pry off plate that holds seal ( very careful). Clean everything good and remove old seal install new. Maybe get a friend to help. Two heads are better than one sometimes. Good Luck. bkr PS Make sure you can get a seal before you remove the old one.

[filthyphil]

filthyphil

I've got a similar problem. Oil leaking over the rim and tyre, thought it will just be the big seal on the bevel drive inner case you see when the wheel is out.
But, the oil is inside all over the female splines, which should be dry/grease only. So looking at the issue more closely I see a seal at the back of the needle roller support bearing, into which the tapered end of the female spline assembly fits, which I deduce stops oil getting from the main case into the centre of the hub.
Looks to me like a full strip down, heat the case to get the needle roller out, then replace the seal and reverse the steps - am I on the right track?
Any feedback/tips will be appreciated.
cheers
Phil