BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: BeenyBoy on 28 Dec, 2018, 20:15

Title: Absolute Disaster !!!!!!!!!!!!!!
Post by: BeenyBoy on 28 Dec, 2018, 20:15
Plunger B31......So...following a magneto re-furb I put it all back together and set about re-sting the ignition timing- I've found the easiest way of turning the engine over to find tdc and 11mm btdc is to stick a socket on the timing side mainshaft nut- so there we go ...tdc found...back a bit and slowly forward and 'splunk' the end of the shaft shears off !! "o deary deary me " quoth I.." thats a shame".....well words to that effect !   what an absolute *******...
Anybody got a mainshaft they don't need ? :'( :'( :'( :'( :'( :'( :'( :'( :'( :'(
Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: DerekAnderson8 on 29 Dec, 2018, 17:57
oh dear that's not good!

that's a walk away from bike and come back the next day!

>:(

Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: sidewaysid on 30 Dec, 2018, 08:19
I take it you mean the CRANKSHAFT ??? jeeeeeez
Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: ANDY HIGHAM on 30 Dec, 2018, 09:40
It's better it happened on the bench than out on the road.
I have a B31 crankshaft in Bolton Lancs, where are you based?
Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: AdrianS on 30 Dec, 2018, 11:17
Did you turn it over with the plug out?

If the nut/ shaft sheared that easily, better for it to happen on the bench than when riding the bike!
Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: BeenyBoy on 30 Dec, 2018, 13:06
Thanks for the sympathy guys.  I guess it had been over-tightened at sometime and this just 'pushed it over the edge'

Could be interested in the bits Andy- I'm in North West Lincolnshire

Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: ANDY HIGHAM on 30 Dec, 2018, 15:11
Are you going to the Newark show next weekend? I will be there on Sunday
Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: BeenyBoy on 30 Dec, 2018, 19:56
Hi Andy

Yes.. planning to go over on Sunday.....
Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: ANDY HIGHAM on 30 Dec, 2018, 20:09
I will bring the crank over. Does £100 sound fair?
Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: BeenyBoy on 30 Dec, 2018, 20:39
Hi Andy

is it a complete fly-wheel/crank/con rod ?

cheers

Mike

Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: ANDY HIGHAM on 30 Dec, 2018, 20:42
Yes
Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: ANDY HIGHAM on 30 Dec, 2018, 21:21
I have sent you a message
Title: Re: Absolute Disaster !!!!!!!!!!!!!!
Post by: BeenyBoy on 06 Jan, 2019, 12:58
Replacement sorted- thanks to Andy Higham

cheers mate