WD Motorcycle forum

Author

Comment

Jan 19, 2024 - 5:02PM

Re: Measurements - Max Speed BSA M20

Well it won't do 81mph without some serious surgery:relaxed: ...My 720cc 'M20' which is standard apart from the capacity boost, changes to gearing and an M21 carb has been clocked by a car at 78mph but frankly there wasn't much, if anything, left performance wise...
Young engineers?...Not many of them about Ron..Apart from the fact our manufacturing base has virtually gone the 'youf' haven't got time to look up from the social media accounts on their phones as they check out their 'today' photos on Tic Toc..:laughing:..Addiction is indeed a terrible thing...Ian.

email (option): ian@wright52.plus.com

darren

Jan 19, 2024 - 11:54PM

Re: Measurements - Max Speed BSA M20

From someone who uses mm’s and inches, it is surprising how many BSA’s seem to have my creations on them.

Worse so,is the fact I make English parts here in the Antipodes.

Bruce

Jan 20, 2024 - 4:29AM

Re: Measurements - Max Speed BSA M20

Ian Wright

Wow Ian, 78MPH on a 720cc M20, I am very impressed! What gearing were you using?

Jan

Jan 20, 2024 - 2:09PM

Re: Measurements - Max Speed BSA M20

Jan

Just wondering... Was this information useful?

Jan

@ Cosimo, is this the information that you were looking for...?

I’m afraid that I will have to quote Cicero again…
"Gratia non solum maxima, sed etiam parens omnium virtutum." (Cicero)
Or in Shakespeare's language:
“Gratitude is not only the greatest of virtues, but the parent of all the others.”
😟

email (option): wd.register@gmail.com

Mark Cook

Jan 21, 2024 - 2:46PM

Re: Measurements - Max Speed BSA M20

"Fascinating stuff, this Imperial system... Blame Napoleon and the fact that we have 10 fingers on our hands for the Metric System. Less fun... 😁"

I used to wonder if there was a time when it was common for some people to have 6 fingers and toes on each hand and foot Jan?

Mark

email (option): pes.sales@btconnect.com

Jan

Jan 21, 2024 - 5:57PM

Re: Measurements - Max Speed BSA M20

Have a look at this Mark! 😃

email (option): wd.register@gmail.com

Ian Wright

Jan 21, 2024 - 7:40PM

Re: Measurements - Max Speed BSA M20

'If it ain't broke don't fix it'....Ian

email (option): ian@wright52.plus.com

Hamish

Jan 22, 2024 - 1:19AM

Re: Measurements - Max Speed BSA M20

Interesting info Jan. Can anybody explain the discrepancies in the measurements of the left & right turning circle's?

email (option): fuzzyempire@hotmail.com

Ron Pier

Jan 22, 2024 - 7:15AM

Re: Measurements - Max Speed BSA M20

Possibly it's because the left fork leg is splayed out for the speedo drive? Ron

email (option): ronpier@talk21.com

Alwyn Dart

Jan 22, 2024 - 9:26AM

Re: Measurements - Max Speed BSA M20

Since about September last year, my Wm20 has been absolutely flying!!! When I take her out I find myself having to concentrate a lot more on holding her back, sport's car's, Honda's, Ducati's even MV Agusta's can't live with my old War horse. But then I do live in Wales and there is a blanket 20mph speed limit. So finally my 13bhp can blow em all away 😂

Mark Cook

Jan 22, 2024 - 12:01PM

Re: Measurements - Max Speed BSA M20

Thanks Jan, that answers many questions.
Not so good for french relations!

Mark

email (option): pes.sales@btconnect.com