Chain Case oil seal

Previously patrick_mullen wrote:

Hello there,

It's been a long time since I last had this chaincase apart but the alloy washer you are holding is not the same as I remember. The one I think I remember is a dished steel washer held on by 4 rivets. It supports the oil seal and normally you don't take this washer/plate off. It is not mentioned in the Maintenance Manual as far as I know.

Maybe someone else is more up to date on doing this

Patrick

Thanks Patrick, it didn't look right but I suspect it is a good effort at a replacement as I can't find the dished washer on the spares site so may end up using it any way. I have a lathe so making a dished version would be an option. I suspect the restriction is clearence between the sprocket and new washer plus rivets. Although I have been a little harsh with my criticism of the previous builder, much of this engine / motorbike is very good and I look forward to stsarting her up. Though once the engine / gearbox is done, the next will be the forks, then wheels, then when the summer comes the paint. After that I will need to find something else to do....

Previously Andrew Wibmer wrote:

Previously patrick_mullen wrote:

Hello there,

It's been a long time since I last had this chaincase apart but the alloy washer you are holding is not the same as I remember. The one I think I remember is a dished steel washer held on by 4 rivets. It supports the oil seal and normally you don't take this washer/plate off. It is not mentioned in the Maintenance Manual as far as I know.

Maybe someone else is more up to date on doing this

Patrick

Thanks Patrick, it didn't look right but I suspect it is a good effort at a replacement as I can't find the dished washer on the spares site so may end up using it any way. I have a lathe so making a dished version would be an option. I suspect the restriction is clearence between the sprocket and new washer plus rivets. Although I have been a little harsh with my criticism of the previous builder, much of this engine / motorbike is very good and I look forward to stsarting her up. Though once the engine / gearbox is done, the next will be the forks, then wheels, then when the summer comes the paint. After that I will need to find something else to do....

I stand corrected, just found one on the spares page, order on the way. Many thanks.

Andrew

Previously graham_squires wrote:

This is an image of a spare I have , exactly as patrick remembered. I have seen another chaincase with where the casting surrounding the oilseal is thicker and square on the inside of the chaincase ?. memories fade here, I remember something different.

GRAHAM

thanks Graham, that looks more likely. This is an early so entirely possible that the later one was a better design - thicker.

Previously Dan Field wrote:

Yes thatâs what mine looks like, I donât think it need to come apart to replace the oil seal although removing the old one might need some heat?

Dan

Hello Dan,

hope you had a productive day at Bristol, if you see any styling panels on your travels you have a ready sell here . Thanks for posting the photos, I will order the correct washer later on, been a while since I had to use proper rivets though.

Regards

Andrew