Alu chaincase gasket

TommoT · Post by **TommoT** » Fri Jun 29, 2007 5:47 pm

What material is used for the gasket between the halves of the aluminium primary chaincase? If it is just paper I was thinking of cutting a batch myself.

Biscuit · Post by **Biscuit** » Fri Jun 29, 2007 6:09 pm

Forget the gasket - silicone bike gasket.

lawrence · Post by **lawrence** » Fri Jun 29, 2007 11:02 pm

quote:
Forget the gasket - silicone bike gasket.

Shucks, Alan is always saying that. Just because it works better.

TommoT · Post by **TommoT** » Fri Jun 29, 2007 11:33 pm

quote:
quote:
Forget the gasket - silicone bike gasket.

Shucks, Alan is always saying that. Just because it works better.

Personally, I couldn't think of a better reason to say it! RTV Silicone it will be!...

deshollier · Post by **deshollier** » Sat Jun 30, 2007 1:05 pm

I'm sure I don't need to say it , but I will any way! Clean and degrease both mating surfaces thoroughly. RTV is very good - but it can not work miracles!

TommoT · Post by **TommoT** » Sat Jun 30, 2007 5:51 pm

...just to elaborate, is there a sealing arrangement around the gearbox/clutch axle? Or is it just an open hole as on the pressed steel ones?

Biscuit · Post by **Biscuit** » Sat Jun 30, 2007 7:56 pm

If you do this, you will have a hell of a job when it comes to dismantling.

There should be a sliding seal at this point.Edited by - Biscuit on 30 Jun 2007 6:59:06 PM

TommoT · Post by **TommoT** » Sat Jun 30, 2007 8:51 pm

...i get your drift Biscuit, I need to use special motorcycle gasket that lets go easier than ordinary household RTV.

Biscuit · Post by **Biscuit** » Sun Jul 01, 2007 12:11 am

I use the stuff that is sold for the purpose, haven't got clue on RTV.

I have found that degreasing, in the full sense of the term, is unnecessary, after cleaning off the old gasket or goo, a wipe with a clean rag will suffice. Indeed one of the makes I have used, Granville instant bike gasket, suggests oiling one face to facilitate removal.

Get it from the Club - 900646 Bike instant gasket £4.58.

Don Madden · Post by **Don Madden** » Sun Jul 01, 2007 3:20 am

The alloy chaincase to bearbox has a sliding arrangement of two large disks crimped at the center with a ring. If not battered it does alright at deflecting most oil in & most water out.

As it fits somewhat loosly on the output shaft, I slip a large o-ring over the nose of the shaft behind the clutch sprocket. This keeps water from spashing into the clutch bearing.

Cheers, Don.