BritBike Forum logo
BritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike Sponsor SteadfastCyclesBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorHepolite PistonsBritBike Sponsor
Upgrade to: Premium Membership | Gold Membership | Life Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
Servodyne
Servodyne
England
Posts: 121
Joined: August 2013
New BritBike book out!
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Manuals on DVD (Shipping included)
Previous Thread
Next Thread
Print Thread
Rate Thread
clutch shaft end play 1974 T100R
#796745 01/27/20 5:00 pm
Joined: Jan 2020
Posts: 9
L
Lucas57 Offline OP
Britbike forum member
OP Offline
Britbike forum member
L
Joined: Jan 2020
Posts: 9
1974 T100R Daytona. i have removed the clutch, the clutch hub and cover plate exposing the gearbox sprocket. The end play as measured from the threaded end of the clutch end of the main shaft is .07 inches or 1.8mm. Is this within the acceptable range?

Support Your #1 BritBike Forum!

Check out British motorcycles for sale: British Motorcycles on e-Bay UK, British motorcycles on e-Bay North America
Re: clutch shaft end play 1974 T100R
Lucas57 #796749 01/27/20 5:25 pm
Joined: Jan 2013
Posts: 235
C
Britbike forum member
Offline
Britbike forum member
C
Joined: Jan 2013
Posts: 235
The mainshaft is fixed to a bearing on the timing side of the gearbox and should have no end play.

Chris

Re: clutch shaft end play 1974 T100R
Lucas57 #796755 01/27/20 5:58 pm
Joined: Aug 2001
Posts: 8,392
Likes: 39
Britbike forum member
Offline
Britbike forum member
Joined: Aug 2001
Posts: 8,392
Likes: 39
A common cause is the nut at the other end of the shaft being loose.


Amateur Loctite enthusiast.
Re: clutch shaft end play 1974 T100R
Lucas57 #796780 01/27/20 10:11 pm
Joined: Jan 2020
Posts: 9
L
Lucas57 Offline OP
Britbike forum member
OP Offline
Britbike forum member
L
Joined: Jan 2020
Posts: 9
Yes, the nut on opposite end of the main shaft did not have a nutlock on it and came loose. The clutch pushrod had worn causing the main shaft nut to rub on the pushrod mechanisms apparently unscrewing it a couple of turns.

Re: clutch shaft end play 1974 T100R
Lucas57 #796801 01/28/20 1:43 am
Joined: Nov 2012
Posts: 1,745
Likes: 27
K
Britbike forum member
Offline
Britbike forum member
K
Joined: Nov 2012
Posts: 1,745
Likes: 27
I very much doubt that the pushrod had anything to do with it. If the nut was loose, there's your culprit, as TT first indicated.
If the pushrod is worn, that is another, and separate matter.
A worn pushrod won't cause a loose mainshaft nut, the excess length of the mainshaft as a result of the mainshaft nut coming loose will make it seem like the pushrod is shorter.

Re: clutch shaft end play 1974 T100R
Lucas57 #796827 01/28/20 9:33 am
Joined: Nov 2005
Posts: 7,725
Likes: 33
Born To Run
Offline
Born To Run
Joined: Nov 2005
Posts: 7,725
Likes: 33
Pay close attention to torque on the timing-side mainshaft nut. There's not a lot of threads and they can strip if over-tightened.

Steve


'77 T140J
"Vintage Bike". What's in your garage?

"The paying customer is always right."

Fitting round pegs into square holes since 1961...
Re: clutch shaft end play 1974 T100R
Lucas57 #796840 01/28/20 5:23 pm
Joined: Feb 2014
Posts: 1,235
Likes: 4
Parts Dealer
Offline
Parts Dealer
Joined: Feb 2014
Posts: 1,235
Likes: 4
As others have stated, if you're worried you can remove the lock tab washer and apply some loctite to allow more thread engagement

Also check and see if the ball bearing is causing lateral movement - if so, may be time for replacement


[Linked Image from live.staticflickr.com]

Moderated by  John Healy 

Link Copied to Clipboard
Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | DVD- Manuals & Parts books
Upgrade to: Premium Membership | Gold Membership | Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.7.4