NASTY SURPRISE

[mattcfish]

The sump on my 95 R100 loked a bit damp so I thought I would change the gasket,on dropping the sump I found a small pin about 1/2" long by 1/16', on reaching for my Haynes I saw it was the locating pin for the front bearing.I have,nt had the sump off for about 4 years and never had the front bearing housing off so it could of been there a while.After making a puller up using a steering-wheel puller I removed the housing, replaced the pin and peened it over properly,apparently if the bearing turns it can cut off the oil-supply to the rockers which can spoil your day.Has it happend to anyone else? Mitch.

Yikes! I've done one of these before. That's a lot of work to get to one little pin. It's interesting how the rear bearing doesn't require one. There are probably a lot of bikes running around without it. Ticking time bombs.

[robtg]

Yikes! I've done one of these before. That's a lot of work to get to one little pin. It's interesting how the rear bearing doesn't require one. There are probably a lot of bikes running around without it. Ticking time bombs.

If the front bearing rotates, oil feed to the top end is blocked. The rear can move a little without consequences.

[Hunsta]

Being mechanicly backward, is this pin accessable when you take the sump plate off? Or is it in another postion. I have a small weep in my sump on the R65. I have the gasket, but dont want that sort of drama.

There was a change in the block in the late 80s and only the late bikes are affeted. Not sure of my years.

I hope 84 is concidered early.

[Zombie Master]

There was a change in the block in the late 80s and only the late bikes are affeted.

Yahooo - there is actually something gooder about the 70s bikes!

Yea, like a decent flywheel.