BritBike Forum logo
BritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorBritBike SponsorThe Bonneville ShopBritBike Sponsor
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
ShoutChat Box
Comment Guidelines: Do post respectful and insightful comments.
Buy BritBike staff a coffee
Buy BritBike's staff a coffeeStill here since 1996 serving BritBike enthusiasts..
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Member Spotlight
gREgg-K
gREgg-K
Ottawa, Canada
Posts: 1,135
Joined: September 2007
Show All Member Profiles 
Newest Members
Heff, kerna, Col, paullowe, Okiewan
10912 Registered Users
Top Posters(30 Days)
franko 86
quinten 63
Popular Topics(Views)
1,050,733 mail-order LSR
a word from..
Forum Statistics
Forums34
Topics68,064
Posts683,148
Members10,912
Most Online14,755
May 5th, 2019
Who's Online Now
41 registered members (998John), 341 guests, and 911 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Is this a 1965 BSA Thunderbolt Engine? #676867 12/07/16 10:11 pm
Joined: Dec 2016
Posts: 23
G
Greg J. Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
G
Joined: Dec 2016
Posts: 23
Just want to confirm I looked up the numbers correctly. Thanks!

[img:center][Linked Image][/img]

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: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #676874 12/08/16 12:16 am
Joined: Sep 2001
Posts: 3,023
Gordo in Comox Online Content
BritBike Forum member
Online Content
BritBike Forum member
Joined: Sep 2001
Posts: 3,023
No. It was built in May of model year 1970-1971 (ie 71 model) Yes it is a Thunderbolt.

Gordo


The roadside repairs make for the best post ride stories.
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Gordo in Comox] #676898 12/08/16 5:03 am
Joined: Dec 2016
Posts: 23
G
Greg J. Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
G
Joined: Dec 2016
Posts: 23
Thanks a lot for the info. I'm pretty new to BSA and must have read it wrong online. So I should now confidently say it is a 1971 thunderbolt.

Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #676925 12/08/16 12:03 pm
Joined: Feb 2014
Posts: 1,172
C.B.S Offline
Parts Dealer
Offline
Parts Dealer
Joined: Feb 2014
Posts: 1,172
I have seen this photo before.... Was this on Craigslist in California?


[Linked Image]
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #676943 12/08/16 3:31 pm
Joined: Dec 2016
Posts: 23
G
Greg J. Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
G
Joined: Dec 2016
Posts: 23
Yes I bought a bunch of stuff off someone that wasn't interested in selling things individually. I bought it with the intent to sell everything but the Hornet project.

Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #677023 12/09/16 12:35 pm
Joined: Feb 2014
Posts: 1,172
C.B.S Offline
Parts Dealer
Offline
Parts Dealer
Joined: Feb 2014
Posts: 1,172
Originally Posted by Gregory Joseph
Yes I bought a bunch of stuff off someone that wasn't interested in selling things individually. I bought it with the intent to sell everything but the Hornet project.


That was my intent too when I saw it. Then reality kicked in... I have to many projects as is. Glad to see that stuff went to a good home. Good luck on the project! Feel free to visit my site if you need anything www.classicbritishspares.com

Last edited by C.B.S; 12/09/16 12:35 pm.

[Linked Image]
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #677043 12/09/16 2:50 pm
Joined: Dec 2016
Posts: 23
G
Greg J. Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
G
Joined: Dec 2016
Posts: 23
It will be a slow project. But in no rush. I found good homes for most of the other big parts. Still have two more engines to let loose then a bunch of small stuff.

Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #677228 12/10/16 11:18 pm
Joined: Aug 2001
Posts: 4,849
Mark Z Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Aug 2001
Posts: 4,849
A bit off topic, but does anyone know why the flange on that cylinder barrel looks so thin? It should be about 1/2" thick - is that perhaps an aftermarket barrel or something?



Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Mark Z] #677229 12/10/16 11:33 pm
Joined: Jun 2002
Posts: 10,007
S
Stuart Online Content
BritBike Forum member
Online Content
BritBike Forum member
S
Joined: Jun 2002
Posts: 10,007
Hi Mark,

Originally Posted by Mark Z
why the flange on that cylinder barrel looks so thin?

It isn't a cylinder barrel, it's a cover plate over the crankcase mouth - better and more pictures.

Hth.

Regards,

Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Stuart] #677324 12/11/16 6:12 pm
Joined: Aug 2001
Posts: 4,849
Mark Z Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: Aug 2001
Posts: 4,849
Originally Posted by Stuart
It isn't a cylinder barrel, it's a cover plate over the crankcase mouth - better and more pictures.

Hth.

Regards,


Oh...duh! Ok, not a bad idea I suppose, for long term storage?


Mark Z

'65(lower)/'66(upper, wheels, front end, controls)/'67(seat, exhaust, fuel tank, headlamp)/'70(frame) A65 Bitsa.
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #677363 12/12/16 12:39 am
Joined: Feb 2014
Posts: 1,172
C.B.S Offline
Parts Dealer
Offline
Parts Dealer
Joined: Feb 2014
Posts: 1,172
Have the cases been polished?


[Linked Image]
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: C.B.S] #677523 12/12/16 11:12 pm
Joined: Dec 2016
Posts: 23
G
Greg J. Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
G
Joined: Dec 2016
Posts: 23
Originally Posted by C.B.S
Have the cases been polished?


I don't believe so. Let me know if you have any other questions.

Thanks!

Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #677724 12/14/16 2:43 pm
Joined: Feb 2007
Posts: 2,312
S
Semper Gumby Offline
BritBike Forum member
Offline
BritBike Forum member
S
Joined: Feb 2007
Posts: 2,312
That number pad tells a story...

Ah BSA, the things you did
Back in the day.

Last edited by Semper Gumby; 12/14/16 2:44 pm.

"Don't trust your eyes if your imagination is out of focus." - Mark Twain
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Semper Gumby] #677725 12/14/16 3:02 pm
Joined: Feb 2014
Posts: 1,172
C.B.S Offline
Parts Dealer
Offline
Parts Dealer
Joined: Feb 2014
Posts: 1,172
Originally Posted by Semper Gumby
That number pad tells a story...

Ah BSA, the things you did
Back in the day.


Ive even seen BSA stamped the small BSA logos upside down.... Someone had to much to drink


[Linked Image]
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #677727 12/14/16 3:09 pm
Joined: Dec 2016
Posts: 23
G
Greg J. Offline OP
BritBike Forum member
OP Offline
BritBike Forum member
G
Joined: Dec 2016
Posts: 23
I took a few pictures for you. Everything moves very smooth.

Let me know if you have any other questions.

[Linked Image]
[Linked Image]
[Linked Image]

Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #677748 12/14/16 8:42 pm
Joined: Aug 2001
Posts: 4,736
gavin eisler Online Content
BritBike Forum member
Online Content
BritBike Forum member
Joined: Aug 2001
Posts: 4,736
Cams look good. better than mine.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: gavin eisler] #677765 12/15/16 5:43 am
Joined: May 2013
Posts: 5,941
Allan Gill Offline
BritBike Forum member
Offline
BritBike Forum member
Joined: May 2013
Posts: 5,941
Originally Posted by gavin eisler
Cams look good. better than mine.


I was thinking that same thing. Looks like little wear :bigt Its a shame your not in the UK and postage to the UK for that weight of lump is not cheap cry


beerchug
Re: Is this a 1965 BSA Thunderbolt Engine? [Re: Greg J.] #677795 12/15/16 11:35 am
Joined: Feb 2014
Posts: 1,172
C.B.S Offline
Parts Dealer
Offline
Parts Dealer
Joined: Feb 2014
Posts: 1,172
Cams do look good.... Nice looking motor


[Linked Image]

Moderated by  Allan Gill, Jon W. Whitley 

Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | DVD- Manuals & Parts books
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.7.3