BritBike Forum logo
BritBike Sponsor BritBike Sponsor BritBike Sponsor
BritBike Sponsor

BritBike Sponsor

BritBike Sponsor
BritBike Sponsor BritBike Sponsor BritBike Sponsor
The Bonneville Shop JRC Engineering dealers
Home | Sponsors, Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons, "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
kelvin
kelvin
Wollaston Northants
Posts: 529
Joined: July 2007
Show All Member Profiles 
Shout Box
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Who's Online Now
32 registered members (AML), 222 guests, and 386 spiders.
Key: Admin, Global Mod, Mod
Newest Members
Davenz13, Sean65, Rerock, pkuzyk, Hunter S
10476 Registered Users
Top Posters(30 Days)
NickL 85
franko 72
Triless 66
Popular Topics(Views)
747,376 mail-order LSR
Forum Statistics
Forums34
Topics68,824
Posts670,345
Members10,476
Most Online3,995
Feb 13th, 2017
Like BritBike.com on Facebook

Previous Thread
Next Thread
Print Thread
Rate Thread
Removing Magdyno from B33...Trouble #611718
08/06/15 8:04 am
08/06/15 8:04 am
Joined: Aug 2015
Posts: 62
Leicestershire, England
O
Owain Offline OP
BritBike Forum member
Owain  Offline OP
BritBike Forum member
O

Joined: Aug 2015
Posts: 62
Leicestershire, England
Hi,

So I'm dismantling the engine of the B33 barn find I have. I'm having trouble removing the magneto drive pninion center nut. Everytime I take a spanner to loosen it...the entire cam gears rotate with it. One of the fella's in the garage said to stick a spanner in the teeth of one of the cam gears to stop it rotating when I try to loosen the nut but that sounds a sure-fire way to knacker the gears themselves.

In the Haynes manual, it says just use a spanner to loosen it....and then use a special tool (no.61-1903) to extract the pninion itself. No chance of me getting to that pninion with this gear and nut in the way though...

Any solutions?


Owain
1969 - BSA Rocket 3
1950- BSA A10
Support your #1 BSA Forum and our favorite sponsors

Check out BSA on e-bay: BSA Parts in UK, BSA Motorcycles in UK, BSA Parts in North America, BSA Motorcycles in North America

 
Re: Removing Magdyno from B33...Trouble [Re: Owain] #611735
08/06/15 10:20 am
08/06/15 10:20 am
Joined: Oct 2008
Posts: 1,685
Canada
L
LarryLebel Offline
BritBike Forum member
LarryLebel  Offline
BritBike Forum member
L

Joined: Oct 2008
Posts: 1,685
Canada
Maybe use a block of hard wood instead.

Re: Removing Magdyno from B33...Trouble [Re: Owain] #611740
08/06/15 11:14 am
08/06/15 11:14 am
Joined: Feb 2011
Posts: 3,539
Orygone
Boomer Offline

BritBike Forum member
Boomer  Offline

BritBike Forum member

Joined: Feb 2011
Posts: 3,539
Orygone
Put the bike in gear, sit on the seat with one foot on the rear brake, remove the nut. The pinion gear sits on a taper. You need an extractor, 61-1903, that threads into the center of the gear. Snug up the bolt in the center of the extractor but don't over tighten. The bolt doesn't remove the gear, a light tap on the end of the bolt will break the hold on the taper. If you use the bolt to remove the gear you will mushroom the end of the magneto pinion.


Bill B...


Boomer
Re: Removing Magdyno from B33...Trouble [Re: Owain] #611779
08/06/15 3:31 pm
08/06/15 3:31 pm
Joined: Aug 2015
Posts: 62
Leicestershire, England
O
Owain Offline OP
BritBike Forum member
Owain  Offline OP
BritBike Forum member
O

Joined: Aug 2015
Posts: 62
Leicestershire, England
Cheers boomer, unfortunately the engine is already removed and laying on a work bench...so no chance of me placing the bike in gear and removing it that way. Good tips for pninion Removal though. Perhaps sticking an old wooden Broom handle between the CAM gears like Larry suggested might work without arsing up the teeth on the gears..


Owain
1969 - BSA Rocket 3
1950- BSA A10
Re: Removing Magdyno from B33...Trouble [Re: Owain] #611791
08/06/15 5:39 pm
08/06/15 5:39 pm
Joined: Jul 2006
Posts: 908
newcastle australia
trevinoz Offline
BritBike Forum member
trevinoz  Offline
BritBike Forum member

Joined: Jul 2006
Posts: 908
newcastle australia
Put a piece of rag between the gears.

Re: Removing Magdyno from B33...Trouble [Re: Owain] #611850
08/07/15 5:29 am
08/07/15 5:29 am
Joined: Sep 2013
Posts: 745
Westminster, Colorado
stubbicatt R.I.P. Offline
In Remembrance
stubbicatt R.I.P.  Offline
In Remembrance

Joined: Sep 2013
Posts: 745
Westminster, Colorado
A shop towel or rag in the gears will jamb them so that the nut may be loosened.


Hate is a poison which one consumes hoping for another to die.

Moderated by  Allan Gill, Jon W. Whitley 


Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.6.2