Britbike forum

Classic British Spares Klempf British PartsBaxter Cycle BritBike Sponsor SteadfastCyclesSRM Engineering Lucas Classic Motorcycle Industrial tec supply Hepolite Pistons The Bonneville ShopLowbrow Customs

Upgrade your membership to: Premium Membership | Gold Membership | Life Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
Richard Phillips
Richard Phillips
San Luis Obispo, CA
Posts: 776
Joined: August 2001
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Top Posters(30 Days)
quinten 88
Rohan 76
Top Likes Received (30 Days)
quinten 12
Newest Members
Looping, Teager, vanGinneke, Gearhard, yornocT120R
11,841 Registered Users
Who's Online Now
1 members (Morgan aka admin), 24 guests, and 60 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
#845453 04/08/21 1:49 pm
Joined: Nov 2020
Posts: 17
Likes: 1
W
wayno Offline OP
Britbike forum member
OP Offline
Britbike forum member
W
Joined: Nov 2020
Posts: 17
Likes: 1
Howdy , ordered new clutch kit for my 67 A65. I'm gonna use ATF so wondering if best to pre soak them or install dry? had lotsa Hondas and always pre soaked them but not sure on the BSA. Again, thanks for the input, Wayno

BSA on eBay
wayno #845454 04/08/21 2:33 pm
Joined: May 2014
Posts: 52
Likes: 3
T
Britbike forum member
Offline
Britbike forum member
T
Joined: May 2014
Posts: 52
Likes: 3
I presoaked mine once and after installation the clutch slipped. I couldn't fix it so ultimately ordered another set- didn't soak, no slip.

wayno #845466 04/08/21 6:04 pm
Joined: Sep 2004
Posts: 1,680
Likes: 151
Britbike forum member
Offline
Britbike forum member
Joined: Sep 2004
Posts: 1,680
Likes: 151
I think much depends on the type of ATF you're going to use, modern ATF contains friction modifiers which will cause clutch slippage.

The general recommendation is to use ATF type F which is an older grade with less or no friction modifiers.

Alternately use monograde 30 oil with an API grade no higher than SG.


1968 A65 Firebird
1967 B44 Shooting Star
1972 Norton Commando
wayno #845468 04/08/21 6:18 pm
Joined: Oct 2007
Posts: 1,397
Likes: 7
W
Britbike forum member
Offline
Britbike forum member
W
Joined: Oct 2007
Posts: 1,397
Likes: 7
using 30 oil because there doesn't seem to be any 20 left in the world. Use the same stuff in my 30 plus year old Ariens mower as well. Works fine in the T100 clutch.

Cheers, Wilf


"It's about the ride..."
wayno #845470 04/08/21 6:26 pm
Joined: May 2013
Posts: 8,195
Likes: 182
A
Britbike forum member
Offline
Britbike forum member
A
Joined: May 2013
Posts: 8,195
Likes: 182
30 weight running in oil is also fine for clutches. It doesn’t have the level of friction modifiers in as its designed to aid cylinder bore-ring bedding in.


Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)

wayno #845497 04/08/21 11:02 pm
Joined: Nov 2018
Posts: 83
Likes: 20
50+ years experience
Offline
50+ years experience
Joined: Nov 2018
Posts: 83
Likes: 20
In my experience, installing the friction plates dry works best. The steel plates will adhere to the friction plates well when their surface is roughed up a little bit also, either by bead blasting, or scuffing on a rough surface to cut some light scratches in the steel driven plates.This will enhance adhesion, which means you won't have to pre-load the clutch springs quite as much, in turn leading to a lighter pull at the clutch lever. I also recommend using plain 20w50 oil in the primary chaincase. Be sure not to saturate the friction plates with too much oil, as they will be prone to sticking together after periods of inactivity. The oil is in the primary chaincase to lubricate the chain, and to some degree, helps in cooling the stator. I worked at a Harley dealership for a couple of years, and we always soaked the clutch plates in oil for an hour before installing, but I don't recommend it with the vintage Brit bike clutches.
-Dave


[Linked Image from thebonnevilleshop.com]
1 member likes this: Ted Sn
wayno #845519 04/09/21 4:30 am
Joined: Nov 2020
Posts: 17
Likes: 1
W
wayno Offline OP
Britbike forum member
OP Offline
Britbike forum member
W
Joined: Nov 2020
Posts: 17
Likes: 1
Thanks to all. I had read an old topic on this subject which steered me towards the ATF/F and even 20wt fork oil ideas but 20w50 is already on my shelf. I continue to learn more and more through this site and my contacts with Dave at the Bonneville shop. Thanks Again, Wayno

1 member likes this: The Bonneville Shop
wayno #845536 04/09/21 12:11 pm
Joined: Oct 2001
Posts: 583
Likes: 7
O
Ola Offline
Britbike forum member
Offline
Britbike forum member
O
Joined: Oct 2001
Posts: 583
Likes: 7
Oil questions are engaging. My favourite primary oil is mineral Tractor Universal 10w/30 (for wet brakes).

Regards

Last edited by Ola; 04/09/21 12:11 pm.

There are no bosses in a technical discussion
(Doug Hele, 1919 - 2001)
1 member likes this: Allan G

Moderated by  Allan G, Jon W. Whitley 

Link Copied to Clipboard
Job CycleBritish Cycle SupplyMorries PlaceKlempf British PartsPodtronicVintage MagazineBSA Unit SinglesBritBike SponsorBritish Tools & FastenersBritBike SponsorBritBike Sponsor






© 1996-2021 britbike.com
Powered by UBB.threads™ PHP Forum Software 7.7.5