Britbike forum

Classic British SparesKlempf British PartsBaxter CycleThe Bonneville ShopLowbrow CustomsGirling Classic MotorcycleLucas Classic MotorcycleHepolite PistonsIndustrial tec supplyJob Cycle

Upgrade your membership to Premium Membership or Gold Membership or even Benefactor


New Sponsor post
10% Off Girling at The Bonneville Shop 2/3-2/9/23
by The Bonneville Shop - 02/03/23 6:14 pm
New FAQ post
News & Announcements
Premium members! 🌟
by Morgan aka admin - 02/04/23 2:40 pm
Buy BritBike staff a coffee ☕️ or pint 🍺
by Morgan aka admin - 01/15/23 9:29 am
Benefactor ✅
by Morgan aka admin - 01/08/23 8:38 pm
How to guides - Technical articles
ShoutChat
Comment Guidelines: Do post respectful and insightful comments. Don't flame, hate, spam.
Member Spotlight
Fisherman
Fisherman
Tennessee
Posts: 702
Joined: November 2005
Top Posters(30 Days)
Lannis 84
DavidP 83
Top Likes Received (30 Days)
Kev. 34
DavidP 27
Newest Members
Uneasy Rider, Mally, Daveed, 70Triumph, Knight57Corv
12,392 Registered Users
Forum Statistics
Forums35
Topics76,551
Posts784,409
Members12,392
Most Online204
Jul 10th, 2022
Random Gallery photo
Photo posting tutorial

Previous Thread
Next Thread
Print Thread
#894368 10/30/22 10:56 am
Joined: Oct 2012
Posts: 6,554
Likes: 366
knuckle head
OP Offline
knuckle head
Joined: Oct 2012
Posts: 6,554
Likes: 366
My neighbor has a 39 BSA 500 side valve....He had a wreck in 1980 and the bike has been stored since then..The front girder fork is bent but not destroyed....one down tube is kinked so at the least it will need replacement. I looked at the dust-covered bike in a dimly lit corner of his garage..The question is, are the tubes mild steel? I assume the other parts are cast steel, aka. malleable iron, brazed together? I have offered to look closely at the bike in my home shop and if possible do the repairs..


61 hot rod A10, 89 Honda 650NT .On a bike you can out run the demons
"I don't know what the world may need
But a V8 engine is a good start for me
Think I'll drive to find a place, to be surly"
British motorcycles on eBay
Joined: Aug 2001
Posts: 9,280
Likes: 226
Britbike forum member
Offline
Britbike forum member
Joined: Aug 2001
Posts: 9,280
Likes: 226
I do believe that the lugs are malleable cast iron, with mild steel tubes pinned and brazed into them, in a hearth.

They may not all be pinned.


Amateur Loctite enthusiast.
Joined: Aug 2001
Posts: 5,256
Likes: 147
Britbike forum member
Offline
Britbike forum member
Joined: Aug 2001
Posts: 5,256
Likes: 147
Sounds like a worthy winter project ! How ‘bout some photos before it gets cleaned up? 👀


Down to ‘69 T120R now a Tr6R tribute bike
‘70 TR6C “happy in the hills”
‘67 A65LA (now single carb)
‘93 K1100RS heavy metal (should be gone, still here…)
Joined: Oct 2012
Posts: 6,554
Likes: 366
knuckle head
OP Offline
knuckle head
Joined: Oct 2012
Posts: 6,554
Likes: 366
Thanks KC, yes photos


61 hot rod A10, 89 Honda 650NT .On a bike you can out run the demons
"I don't know what the world may need
But a V8 engine is a good start for me
Think I'll drive to find a place, to be surly"
Joined: Jul 2012
Posts: 2,132
Likes: 37
Britbike forum member
Offline
Britbike forum member
Joined: Jul 2012
Posts: 2,132
Likes: 37
https://jakerobbinsvintageengineering.co.uk/girderforkrepair

I don’t know if he would know, but jake robbins is a UK girder expert who might be able to answer an email? Obviously you’re not going to send a set of forks across the pond.

Joined: Jul 2012
Posts: 2,132
Likes: 37
Britbike forum member
Offline
Britbike forum member
Joined: Jul 2012
Posts: 2,132
Likes: 37

Joined: May 2004
Posts: 5,467
Likes: 274
Britbike forum member
Offline
Britbike forum member
Joined: May 2004
Posts: 5,467
Likes: 274
The lower fittings for the axels are forged
The mid fittings joining the tubes can be either forged steel or cast malleable iron
AFAIK BSA always furnace braised all tubing
Tubing is plain carbon but it is tapered


Bike Beesa
Trevor
1 member likes this: Hillbilly bike

Moderated by  Jon W. Whitley 

Link Copied to Clipboard
British Cycle SupplyMorries PlaceKlempf British PartsBSA Unit SinglesPodtronicVintage MagazineBritBike SponsorBritish Tools & FastenersBritBike Sponsor






© 1996-2023 britbike.com
Powered by UBB.threads™ PHP Forum Software 7.7.5