Britbike forum

Classic British Spares Klempf British PartsBaxter Cycle BritBike Sponsor SteadfastCyclesSRM Engineering Lucas Classic Motorcycle Industrial tec supply Hepolite Pistons The Bonneville ShopLowbrow Customs

Upgrade your membership to: Premium Membership | Gold Membership | Life Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
MikeG
MikeG
New Hampshier USA
Posts: 3,272
Joined: August 2001
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Top Posters(30 Days)
quinten 91
Rohan 65
Top Likes Received (30 Days)
quinten 13
Newest Members
makrph, vanGinneke, Gearhard, yornocT120R, robert wilby
11,840 Registered Users
Who's Online Now
2 members (Semper Gumby, Gordon Gray), 26 guests, and 95 robots.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
#848250 05/06/21 7:30 pm
Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
I bought this weird thing on eBay. It has a Matchless 500cc twin, the front end has Triumph labeled trees, and the transmission looks like a BSA A10 transmission. However, I have no idea what the frame is - not even sure it's British. Does anyone have any ideas? Pretty sure it's not Matchless, but the 1951 Matchless has a similar hole in the downtube like a 1951 Matchless G9.

Any ideas what it is?

[img]https://postimg.cc/BLRNj3DX[/img]

[img]https://postimg.cc/bsMhTSh5[/img]

British motorcycles on eBay
Joined: Jan 2013
Posts: 257
Likes: 7
C
Britbike forum member
Offline
Britbike forum member
C
Joined: Jan 2013
Posts: 257
Likes: 7
Front half of the frame is late Triumph rigid.

Chris

Last edited by Chris Johnson; 05/06/21 7:49 pm.
Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
Thanks Chris. Do you know where I can look for a serial number? I've looked at the neck, all tubes and can't find anything. There is this:

[img]https://postimg.cc/2b7Y7CdX[/img]

I can't really tell if this is a serial number. Does it look like the right place and format for a Triumph serial number? I note that this is a frame that is designed for the engine to be a stressed member, but not this particular engine (hence the use of adapter plates for mounting).

I'm not worried about the back part - I think it's a custom made part.

Last edited by Gary Colwill; 05/06/21 9:23 pm.
Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
Now that you mention Triumph, I found this on eBay and can see many similarities:

Triumph Frame on eBay

It's just that weird hole in the downtube that throws me off.

Joined: Jan 2013
Posts: 257
Likes: 7
C
Britbike forum member
Offline
Britbike forum member
C
Joined: Jan 2013
Posts: 257
Likes: 7
Frame number would be on the other side of what you’ve shown, left side of the frame, behind the headstock, stamped in and not raised/cast in place.

That’s not intended to use the engine as a stressed member. Someone has created engine mounts that accomplish that. The original rear section has lower frame members that begin at the bottom of the front down tube and extend back to the rear axle.

Chris

1 member likes this: Gary Colwill
Joined: Jan 2013
Posts: 257
Likes: 7
C
Britbike forum member
Offline
Britbike forum member
C
Joined: Jan 2013
Posts: 257
Likes: 7
That hole is for the air filter connector hose to pass through. Only used in 53 and I believe 52. Others know more than me.

Chris

1 member likes this: Gary Colwill
Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
Very nice info - thanks. So, did these even have serial numbers on them in 1952-53? I know early Harley's just went by the engine number and the frame had no number. Maybe that's the case here and I'm searching for a number in vain. :-)

Joined: Aug 2001
Posts: 4,082
Likes: 46
R
Britbike forum member
Offline
Britbike forum member
R
Joined: Aug 2001
Posts: 4,082
Likes: 46
Harleys were a law unto themselves in that era.
Everyone else had frame numbers ...

Has it been painted over, or ground off even ?

Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
Bingo: 1952 Triumph Thunderbird 6T

Image #10 shows the hole very clearly.

Can't really tell where that serial number is located though. I'll search some more, now that I have a clue.

Thanks much.

Care to weigh in on the wheels?

[img]https://postimg.cc/QVsKGbtc[/img]

[img]https://postimg.cc/VdkS5kX6[/img]

Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
Maybe. I don't mind wire wheeling off a little paint if I know where to start. Trying to figure that out now. This won't be the first bike I've gotten with a painted over serial number :-)

Joined: Aug 2001
Posts: 4,082
Likes: 46
R
Britbike forum member
Offline
Britbike forum member
R
Joined: Aug 2001
Posts: 4,082
Likes: 46
Originally Posted by Gary Colwill
Care to weigh in on the wheels?

Look japanese. Even the 1st axle looks japanese.
If there is enough left of the rim, can you read the makers name stamped into it.

That 1st one could be suzuki TLS, with one of the cams omitted ?!?
(Maybe there are no shoes inside ?!)

Good Luck ! We hope you bought it for the engine ...

Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
Hah - that's exactly why I bought it. And it turns and has compression - I just checked. Very happy about that. Maybe I'll just junk the rest. Maybe someone will find value in the transmission.

Last edited by Gary Colwill; 05/06/21 10:58 pm.
Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
In fact, if anyone here sees any value in the frame, transmission or other parts, let me know.

Joined: Feb 2014
Posts: 906
Likes: 138
C
Britbike forum member
Offline
Britbike forum member
C
Joined: Feb 2014
Posts: 906
Likes: 138
Hi Gary,
What letters/numbers are stamped on top of the BSA gearbox?
Depending on those the gearbox could be worth a decent amount

John

Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
STD:

[img]https://postimg.cc/S2TCZYhn[/img]

Sounds bad...

Joined: Aug 2001
Posts: 4,082
Likes: 46
R
Britbike forum member
Offline
Britbike forum member
R
Joined: Aug 2001
Posts: 4,082
Likes: 46
Everything has a value. Even japanese hubs - if you can figure out what make/model/year they are.
I was once given an M20 engine WELDED into a Matchless frame. (that saves on bolts !)
I reckon that contributed to about 10 bikes restorations ...

1 member likes this: Gary Colwill
Joined: Oct 2001
Posts: 1,846
Likes: 192
S
Britbike forum member
Offline
Britbike forum member
S
Joined: Oct 2001
Posts: 1,846
Likes: 192
Originally Posted by Gary Colwill
STD:

[img]https://postimg.cc/S2TCZYhn[/img]

Sounds bad...
STD (STandarD) was the most common swing-arm pre-unit BSA gearbox. They don't bring the high prices of the more exotic competition gearboxes, but are still worth a few dollars. The 6-spring clutch can be made to work acceptably, so that probably adds a bit to the value of the gearbox..

1 member likes this: Gary Colwill
Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
I'm wondering how well this BSA gearbox matches up to this Matchless engine. Any thoughts on that? if they work well together, maybe I'll keep the gearbox.

Last edited by Gary Colwill; 05/07/21 3:40 am.
Joined: Nov 2019
Posts: 14
G
Britbike forum member
OP Offline
Britbike forum member
G
Joined: Nov 2019
Posts: 14
Found it:

[img]https://postimg.cc/CZh5x9mj[/img]

19159NA

Joined: Aug 2001
Posts: 7,309
Likes: 98
Britbike forum member
Offline
Britbike forum member
Joined: Aug 2001
Posts: 7,309
Likes: 98
1952 model year.

[Linked Image from i.postimg.cc]


Jon W.


1957 6T Thunderbird 650
1968 T100R Daytona 500
1971 TR6R Tiger 650
1970 BSA A65F 650
1955 Tiger 100 - Project
1971 BSA A65 650 - Project
1972 Norton Commando 750 "Combat"


"Every time I listen to AC/DC, so do my neighbors"

Joined: Oct 2008
Posts: 7,307
Likes: 164
Britbike forum member
Offline
Britbike forum member
Joined: Oct 2008
Posts: 7,307
Likes: 164
Oooo, a grease fitting for the steering bearings. I like it!


Knowledge speaks. Wisdom listens.

72 T120V cafe project "Mr. Jim"
72 T150V "Wotan"
92 BMW K100rs "Gustav"
Joined: May 2004
Posts: 4,923
Likes: 93
B
Britbike forum member
Offline
Britbike forum member
B
Joined: May 2004
Posts: 4,923
Likes: 93
Originally Posted by DavidP
Oooo, a grease fitting for the steering bearings. I like it!

Only works if the frame tubes are blanked off or all they do is fill the frame with grease which makes the bike quite heavy .


Bike Beesa
Trevor
Joined: Aug 2015
Posts: 1,787
Likes: 47
A
Britbike forum member
Offline
Britbike forum member
A
Joined: Aug 2015
Posts: 1,787
Likes: 47
Even if the frame tubes are blanked filling up the headstock tube with grease can have a detrimental effect on handling. It will be like a steering damper you can't release


BSA B31 500 "Stargazer"
Greeves 200 "Blue Meanie"
Greeves 350
Greeves 360
GM500 sprint bike "Deofol"
Jawa 500 "Llareggub"
Aprilia RSV Mille "Lo Stregone"
'35 & '36 OK Supreme
Kawasaki ZZR1400 "Kuro no senshi"
Joined: May 2004
Posts: 4,923
Likes: 93
B
Britbike forum member
Offline
Britbike forum member
B
Joined: May 2004
Posts: 4,923
Likes: 93
Originally Posted by Andy Higham
Even if the frame tubes are blanked filling up the headstock tube with grease can have a detrimental effect on handling. It will be like a steering damper you can't release
Only if the ends are sealed pressure tight
I fill mower blade spindles with grease every day
makes almost no differenc to the freedo of their spin.
What the grease does is keep dirt debis & water out thus extending the life of correctly fitted bearings.


Bike Beesa
Trevor

Moderated by  Jon W. Whitley 

Link Copied to Clipboard
Job CycleBritish Cycle SupplyMorries PlaceKlempf British PartsPodtronicVintage MagazineBSA Unit SinglesBritBike SponsorBritish Tools & FastenersBritBike SponsorBritBike Sponsor






© 1996-2021 britbike.com
Powered by UBB.threads™ PHP Forum Software 7.7.5