BritBike Forum logo
BritBike Sponsor BritBike Sponsor BritBike Sponsor
BritBike Sponsor

BritBike Sponsor

BritBike Sponsor
BritBike Sponsor BritBike Sponsor BritBike Sponsor
JRC Engineering dealers
Home | Sponsors, Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons, "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Member Spotlight
Bob Mitch
Bob Mitch
Biggin Hill Kent England
Posts: 188
Joined: April 2011
Show All Member Profiles 
Shout Box
Search eBay for motorcycle parts in following countries
Australia, Canada, France, Holland, Italy, United Kingdom, USA
Random Gallery photo
Who's Online Now
51 registered members (57nortonmodel77), 273 guests, and 396 spiders.
Key: Admin, Global Mod, Mod
Newest Members
Gtommy, Stew Dempsey, JoeBrown, Bart223, Duckster
10175 Registered Users
Top Posters(30 Days)
Lannis 102
reverb 89
Stuart 69
koan58 68
L.A.B. 54
Popular Topics(Views)
554,204 mail-order LSR
Forum Statistics
Forums34
Topics66,605
Posts645,495
Members10,175
Most Online3,995
Feb 13th, 2017
Like BritBike.com on Facebook

Previous Thread
Next Thread
Print Thread
Rate Thread
UK Home Market tank on '71 A65L #648383
04/12/16 4:16 pm
04/12/16 4:16 pm
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
kurt fischer Offline OP

#irideslow
kurt fischer  Offline OP

#irideslow
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
Some of you may recall that I found and installed a UK home market fuel tank (big square one) on my '71 A65L OIF project. When I first got the bike running, I had the tank mounted temporarily, a bad habit of mine, "I'll get to that later."

Now it's "later" and I am trying to get the machine running again after rebuild, but I am running into tank mounting problems.

The main problem is the tank contacts the frame on both sides of the rear of the tunnel, where the frame has a plate welded on for the head steady attachment. It's very close or contacting the frame whether I slide the tank fore-aft as much as I can, or lift it with additional padding.

I recall reading somewhere that there are several variations of models of the big square tank. I'm wondering if maybe I got a hold of a Triumph tank, since a Triumph wouldn't have that head steady plate welded to the frame back bone and no resultant clearance problem.

There are other problems, but no need to go there if this is the absolute wrong tank.

What's anybody think? or know?

Thanks,



Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Support your #1 BSA Forum and our favorite sponsors

Check out BSA on e-bay: BSA Parts in UK, BSA Motorcycles in UK, BSA Parts in North America, BSA Motorcycles in North America

 
 
Re: UK Home Market tank on '71 A65L [Re: kurt fischer] #648400
04/12/16 5:26 pm
04/12/16 5:26 pm
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
gavin eisler Offline
BritBike Forum member
gavin eisler  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
My similar tank is tight at that spot, if I move it rearwards it clears , just, Once its down its OK.

You may need to dress the frame welds.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: UK Home Market tank on '71 A65L [Re: gavin eisler] #648414
04/12/16 6:16 pm
04/12/16 6:16 pm
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
kurt fischer Offline OP

#irideslow
kurt fischer  Offline OP

#irideslow
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
Thanks, Gavin, I will give it a go and keep at it. Besides, I have a lot invested in the reconditioning of this tank, and I like the way it looks. And the capacity.

Then to work on the petcocks clearing the carbs and air hoses. And the grab bag of mounting hardware I'm fiddling with. And the way the forward cross strap fouls the horn.

Other than that, I love the tank!


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: UK Home Market tank on '71 A65L [Re: kurt fischer] #648471
04/13/16 5:59 am
04/13/16 5:59 am
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
gavin eisler Offline
BritBike Forum member
gavin eisler  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
If you keep the carb mounts stock and fit 90 degree bends at the gas taps there are no clearance issues, my carbs on stubs cause a few probs though. The forward brace should have a cut out to clear the horn.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: UK Home Market tank on '71 A65L [Re: kurt fischer] #648474
04/13/16 6:42 am
04/13/16 6:42 am
Joined: Sep 2005
Posts: 5,963
NL
G
Ger B Offline
BritBike Forum member
Ger B  Offline
BritBike Forum member
G
Joined: Sep 2005
Posts: 5,963
NL
Quote:
maybe I got a hold of a Triumph tank

The tank on my A65T 1971 is suspect for being a Triumph tank.
It has no problems.
How far apart are the threaded holes of the bracket between the two tank halves of your tank, Kurt?
The bracket I mean is in front, above the horn.


Ger B

Re: UK Home Market tank on '71 A65L [Re: Ger B] #648480
04/13/16 7:27 am
04/13/16 7:27 am
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
kurt fischer Offline OP

#irideslow
kurt fischer  Offline OP

#irideslow
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
Gavin, Ger, thanks.

I thought of one other factor influencing the position of the tank: when I stripped the bike down the first time, I found that the center tank mounting slot-tab-bracket was missing from the frame, so when I had some repairs and reinforcements welded on the frame, the shop fabricated and welded on a new tank mounting tab. Could be that it's a little too far forward, but there is enough "meat" there so I can elongate the slot toward the rear and slide the tank back more.

I do have 90* bend fittings on the petcocks, I just have to slide the tank back so that they clear the carbs.

The forward tie-strap is a straight piece, then I did cut an arc in it to clear the horn the first time that I mounted the tank. Will measure.

More news later ... .


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: UK Home Market tank on '71 A65L [Re: kurt fischer] #648487
04/13/16 8:06 am
04/13/16 8:06 am
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
gavin eisler Offline
BritBike Forum member
gavin eisler  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
Hi Kurt , check your steering lock with the tank mounted, if the lock stops are at all worn you may have stanchion / tank hello issues. A blob of weld on the fixed frame stops will cure this, but your tank needs to be far enough back. Fit without the centre mount bolt to find optimum then tweak the mount bracket as needs be. For years I ran with a 1/4 " tank centre mount with a nut securing it to the bracket, this gave a bit more adjustability ( wauchle), a conical rubber sat on top of the bracket, a tube passed through ( this has to be shorter than the compressed stack of the rubbers for correct isolation)and up to the top conical rubber above the tank internal washer, then a large pennny washer on top of that with a nut to secure. The parts book I have only shows the mounts for the smaller tank, you may need to get creative here. I am about to go through this process again , the tank bracket centre mount has just been replaced.
I use two of these one above , one below.
https://www.google.co.uk/search?q=T+140+tank+mounting+rubbers&tbm=isch&imgil=ZPbQBA9a0t9odM%253A%253BXVm2u11pCyi8oM%253Bhttps%25253A%25252F%25252Fwww.classicbritishspares.com%25252Fcollections%25252Ftriumph-frame&source=iu&pf=m&fir=ZPbQBA9a0t9odM%253A%252CXVm2u11pCyi8oM%252C_&usg=__ktfpvcuwJO0hO65HVf18EeE-TFQ%3D&biw=896&bih=426&ved=0ahUKEwiYp9nVyYvMAhVDVRQKHaqmBmkQyjcIPg&ei=NjYOV5i0E8OqUarNmsgG#imgrc=ZPbQBA9a0t9odM%3A

Last edited by gavin eisler; 04/13/16 8:07 am.

71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: UK Home Market tank on '71 A65L [Re: gavin eisler] #648491
04/13/16 8:28 am
04/13/16 8:28 am
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
kurt fischer Offline OP

#irideslow
kurt fischer  Offline OP

#irideslow
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
Thanks, Gavin, I'm OK on the steering stops, they have been repaired and modified to meet the alloy triple tree (from a B50 I think). Brilliant idea about positioning the tank where I want it without the center bolt, then take a look-see to determine where the center mount needs to be.

Later ...


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: UK Home Market tank on '71 A65L [Re: kurt fischer] #648549
04/13/16 4:20 pm
04/13/16 4:20 pm
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
gavin eisler Offline
BritBike Forum member
gavin eisler  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
The pic shows my fuel tap position, the carbs sit farther back than stock here, this is a Triumph tank.
HTH


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: UK Home Market tank on '71 A65L [Re: gavin eisler] #648551
04/13/16 4:39 pm
04/13/16 4:39 pm
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
kurt fischer Offline OP

#irideslow
kurt fischer  Offline OP

#irideslow
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
[quote=gavin eisler]The pic shows my fuel tap position, the carbs sit farther back than stock here, this is a Triumph tank.
HTH/quote]

Thanks, yes, helps. So far, I find that I need to extend (somehow) the center mount bracket about an inch toward the rear. And file or grind down the headsteady plate & weld in order to gain some clearance (and I will probably sneak a layer of foam between the tunnel and frame on both sides).

Question for you, Gavin: how big is the gap between the very back edge of the tank and the front edge of the oil fill cap? Or does the tank extend over the cap at all?


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: UK Home Market tank on '71 A65L [Re: kurt fischer] #648552
04/13/16 4:46 pm
04/13/16 4:46 pm
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
gavin eisler Offline
BritBike Forum member
gavin eisler  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
Front


Rear


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod
Re: UK Home Market tank on '71 A65L [Re: gavin eisler] #648793
04/15/16 7:45 pm
04/15/16 7:45 pm
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
kurt fischer Offline OP

#irideslow
kurt fischer  Offline OP

#irideslow
Joined: Nov 2010
Posts: 2,953
Boston, Massachusetts, USA
Thanks for the pictures, Gavin. I've got the tank re-mounted now, and everything clears. Fiddled with the center mount. Fiddled with the front cross-tie strap. Turned the petcock elbows in instead of out. And the welds on the headsteady plate, well, I started filing them, making slow progress, then I said what the heck, got out the 4" belt sander, fitted a new 100 grit belt, and applied same to the protruding plate and welds. Took about one minute per side. Now there's enough clearance between the tunnel and the frame at the rear, so when the tank is bolted up and I try to wiggle it or smack it around, there's no metal-on-metal contact, there's about 1/8" clearance on each side.

PS -- Wauchle?


Kurt
1968-70-71 Triumph TR6R Bitsa - 1969 Triumph TR6R - 1971 BSA A65L - 1973 Triumph TR5T
2005 Ducati MTS 1000S DS - 2012 Ducati Hyper 796 - 2014 Kawasaki ZX1000
Re: UK Home Market tank on '71 A65L [Re: kurt fischer] #648840
04/16/16 7:38 am
04/16/16 7:38 am
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
gavin eisler Offline
BritBike Forum member
gavin eisler  Offline
BritBike Forum member
Joined: Aug 2001
Posts: 3,757
argyll. scotland, uk
"Wauchle," adjective, a certain amount of looseness, enough to allow some movement of two parts relative to another. Obscure Scots engineering dialect.


71 Devimead A65 750
56 Norbsa 68 Longstroke A65
Cagiva Raptor 650
MZ TS 250
The poster formerly known as Pod

Moderated by  Allan Gill, Jon W. Whitley 


Home | Sponsors | Newsletter | Regalia | Calendar | Bike Project | BritBike Museum | Spiders Cartoons | "OLD" BritBike Forum | DVD- Manuals & Parts books | BritBike Stickers & Decals
Upgrade to: Premium Membership | Premium Life Membership | Vendor Membership | Site Sponsor Membership
Powered by UBB.threads™ PHP Forum Software 7.6.1.1
(Release build 20180111)
Page Time: 1.783s Queries: 15 (0.005s) Memory: 1.0850 MB (Peak: 1.3095 MB) Zlib disabled. Server Time: 2018-04-26 13:21:29 UTC