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Jan 15, 2019 - 1:34PM

WM20 chaincase - any modifications worth doing?

Hi All,
So the build is progressing and I am swinging my attention to preparing the chaincase.
The sliding plate looks like it has been run over by a tank several times, so before I order NOS parts is there any improvement to be had over the original plate and felt washer, if so where do i get them from please?
TIA
Scott

email (option): larkesrATgmaildotcom

Jan 15, 2019 - 1:56PM

Re: WM20 chaincase - any modifications worth doing?

Its the same system thats used in later BSA alloy chaincases. I have not come across an improvement. Then again I've never found it not to be oil tight.

I have had my chaincase off to work on the geatbox and if there is one mod I'd like to hear about is a method to make it easier to pull the outer case off the inner. The thin tin overlapping edges do love to hug each other.

Jan 15, 2019 - 5:50PM

Re: WM20 chaincase - any modifications worth doing?

you can buy these somewhere, can't remember where

bsa-goldstar-oil-seal-sliding-plate

I made my own

sliding-plate-oil-seal

Probably not really necessary but I had time on my hands and a lathe sitting idle

Jan 15, 2019 - 7:00PM

Re: WM20 chaincase - any modifications worth doing?

Aaaah, now that's the kinda info I’m after Pete C!!
Anyone know where these can be obtained from???
Scott

email (option): larkesrATgmail.com

Jan 15, 2019 - 7:32PM

Re: WM20 chaincase - any modifications worth doing?

Go to Ebay. BSA clutch sliding plate, there is a few on there.

Jan 15, 2019 - 7:44PM

Re: WM20 chaincase - any modifications worth doing?

Try Phil Pearson Engineering, Bsa Gold Star Specialists,,,
Tel 01493 368331,
enquiries@bsagoldstar.co.uk
I bought one off him a few years ago for my goldie nice piece of kit,

All the best Tom Green.

email (option): rustytomm20@hotmail.com

Jan 15, 2019 - 9:22PM

Re: WM20 chaincase - any modifications worth doing?

Pearson, that's where I saw it before. I remember seeing the price and then making my own for about 3 quid in material and tea plus a sacrificial old plate.:laughing:

Probably still overkill,the original design is crude but pretty effective.

I did hear there are some repro clutch centres out there with the oil scroll going in the wrong direction so that it directs oil out of the case instead of inwards. That can't help keep things oil tight!:fearful:

cheers
Pete

Jan 16, 2019 - 8:22AM

Re: WM20 chaincase - any modifications worth doing?

Personally I think there is no need for an oil seal like this. It would hardly make any difference.

Jan 23, 2019 - 9:50PM

Re: WM20 chaincase - any modifications worth doing?

Aaaah, now that's the kinda info I’m after Pete C!!
Anyone know where these can be obtained from???
Scott

email (option): larkesrATgmail.com

Jan 24, 2019 - 1:51PM

Re: WM20 chaincase - any modifications worth doing?

Pete C

Pearson, that's where I saw it before. I remember seeing the price and then making my own for about 3 quid in material and tea plus a sacrificial old plate.:laughing:

Probably still overkill,the original design is crude but pretty effective.

I did hear there are some repro clutch centres out there with the oil scroll going in the wrong direction so that it directs oil out of the case instead of inwards. That can't help keep things oil tight!:fearful:

cheers
Pete

Keep them oil tight ?

They were never ever oil tight in the first place.

email (option): bsansw1@tpg.com.au

Jan 24, 2019 - 8:37PM

Re: WM20 chaincase - any modifications worth doing?

mine is......well one is, and to misquote Meatloaf: one out of 3 aint bad.:wink:

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