BSA Damaged crank plug removal 

It's not long gone up, thanks for the support, Ade

I hope it's a rare thing to find one like this but strange things happen over 60+ years.

Thank you, sorry to all those who like the videos, just not had much chance for a while. Thanks for watching, Ade

Thank you for keeping the faith, best wishes, Ade

Hi, welcome back, thanks for keeping up with the channel.

Good to be back cheers

Many thanks and thanks for watching, Ade

I'm OK thanks, just busy. Thanks for hanging around, much appreciated, Ade

Much appreciated Roy, thank you. Next video starting upload in a minute...

Thank you and thanks for coming back,Ade

I'm fine thanks, thanks for watching and commenting, Ade

Mike hello, good to hear from you, thanks for watching. Stay tuned for more on this engine, I'll be starting editing the next step today, then (hopefully) doing my own version of the conversion soon.

Happy birthday Dean, glad you liked the present!

Welcome aboard, hope to have more content soon, Ade

Thank you for watching and commenting, appreciated

Thanks 👍

Paul welcome to the channel 👍🏼. Well done on the plug removal, I've had some real gems over the years, it sure doesn't always go easy!

Thanks for continuing to follow the channel. On the next video you see more of this engine and I throw open the question if anyone knows the original converter. I don't think it's SRM having looked more at their method. I hope to do a similar conversion soon to some scrap bits I have acquired over the last couple of years, with some improvements. It may even end up as a Michael Waller style bitsa scrambler one day...Best wishes, Ade.

I just love little challenges like this or i'm mad....

Hi Peter, thanks for returning to the channel. I suppose to the person fitting it, it seemed like a good idea at the time. Myself, I would have just hung one in the oil tank if I thought it would help. Be back again soon with some more stuff, best wishes, Ade

Every sympathy with him, man I've spent some hours battling with surface finishes and tolerances. Rob, great to hear from you as ever, thanks for watching and keeping in touch, Ade

Normally I would agree, but in this case the "plug" was a magnet, glued in. Had I known, I could probably knocked it out from the opposite side 🙄

Hi Al, yes still here bud, I have a bit of time with all this virus stuff going on, hopefully produce a bit of content to keep folk amused. Good to hear from you, pass my regards to Rob when you see him, all the best, Ade.

Welcome back Ade 👍

Many thanks

Unfortunately it was a magnet! So not weldable ☹️

Thanks for watching and commenting 👍🏼. In the event it wasn't 'metal' but a magnet which has more of a ceramic like property.

Hi Chris. Thanks for what is actually a very interesting question. I've just taken a plug out of my small bearing crank to find you the answer...not that straight forward though! Now measuring the OD of the plug I get 0.612" allowing for slightly flat threads that makes it 5/8". Thread pitch comes out at 18TPI with my gauges (tried several) making it 5/8 UNF, now I know unified was used a lot earlier than some realise, as was metric, on british bikes, but this seems odd. Burton bike bits list it as 20 tpi here: www.burtonbikebits.net/TRIStock.pdf The forums talk of 20 tpi also: www.a7a10.net/forum/index.php?topic=5484.0 So probably not a lot of use to you unfortunately. it would be interesting to buy a new 65-0615 plug to see what they sold. Anyone else any thoughts?

Update : I have found my unified thread gauge (closer to cycle angle) , checked inside the crank thread, 20 tpi, so 5/8 x 20 cei . The plug is possibly damaged from removal to make it appear to be 18tpi??? Unless BSA did something odd like an 18tpi plug in a 20tpi hole to make it self sealing and locking? I've got a new plug on the way, genuine old stock BSA, because this is bugging me now! I might do a short video on it even. Best wishes, Ade.

Ade thank you for your diligent, It is in fact 5/8 20tpi cycle thread I ordered a set of taps and checked the taps against the new plug threads and they matched so threads cleaned out and new plugs fitted Thanks for the information

Many thanks, no problem

Maybe, not a standard plug that's for sure. Thanks for watching.

Thanks for watching and commenting. Unfortunately this was a magnetic plug and could not be welded

@@AGEngineering hi i rebuilt and run an ex works /devimead from a kneeler outfit it was very powerfull can the devimead barrells an a65 head fit the a10 casings

Hi Chris, thanks for dropping in. Yes I have a bit of time available so to the workshop, mend stuff, make videos again! Best wishes, Ade

Thank you for saying this, I completely agree , this was a horrible bodge, which highlights that all sorts of things can happen to engines in the decades after good work was done, and totally destroy all the care and quality that was put in by the original builder. Many thanks for watching, please do follow the other videos on this engine and let me know any thoughts . Best wishes, Ade.