old tank on new bonneville - Page 3 - Triumph Forum: Triumph Rat Motorcycle Forums
Air Cooled Twins Talk Discussion of Hinckley Triumph Twin related matters and topics.

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post #21 of 47 (permalink) Old 12-10-2011, 12:17 PM
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it can for the right price lol might get one cheap from the doctor lol.

Why do I feel young on my bike
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post #22 of 47 (permalink) Old 12-10-2011, 12:24 PM
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It would be smart if the OP would buy your tank and do it up like in the photo. I think the consensus of everyone here is that trying to make a real vintage tank work would be opening yourself up to lots of heartache and toil.

But it doesn't seem like we've heard from old hawkline lately. Hey there, fellow Ohioan, you going to do that tank or not?!
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post #23 of 47 (permalink) Old 01-29-2012, 02:30 PM
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I'm going to do this- with (what I believe) is a T150 tank from the early 70's. I've compared the Hinckley and Meriden and they are almost identical as far as the outer shell goes. The Modern tank is a bit more rounded or bulbous in the top- the old one is a bit flatter and of course has the raised seam running down the middle of it. Doing a new tunnel isn't for an amateur but a good fabricator can get it done. I will also make provisions for a modern petcock and then work up some appropriate mounting tabs. The other alternative is to loose the pinch seam on a modern tank- that is the one thing that really sets them apart. Build a new tunnel for an old tank- versus cutting/grinding the pinch weld down flush and welding it up... probably about a wash. With the old tank you have provisions for the old tank badges... another modification to a modern tank IF you want an old badge and if you want the raised seam you'd have to do something there as well. Swapping tanks isn't super difficult- we've seen old Kawasaki tanks and old Honda tanks on modern Bonnies... it can be done if you are determined.
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post #24 of 47 (permalink) Old 01-31-2012, 06:21 AM
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Quote:
Originally Posted by tandawg View Post
I'm going to do this- with (what I believe) is a T150 tank from the early 70's. I've compared the Hinckley and Meriden and they are almost identical as far as the outer shell goes. The Modern tank is a bit more rounded or bulbous in the top- the old one is a bit flatter and of course has the raised seam running down the middle of it. Doing a new tunnel isn't for an amateur but a good fabricator can get it done. I will also make provisions for a modern petcock and then work up some appropriate mounting tabs. The other alternative is to loose the pinch seam on a modern tank- that is the one thing that really sets them apart. Build a new tunnel for an old tank- versus cutting/grinding the pinch weld down flush and welding it up... probably about a wash. With the old tank you have provisions for the old tank badges... another modification to a modern tank IF you want an old badge and if you want the raised seam you'd have to do something there as well. Swapping tanks isn't super difficult- we've seen old Kawasaki tanks and old Honda tanks on modern Bonnies... it can be done if you are determined.

Sounds like a great idea. It had never occurred to me to put a Trident tank on a Bonnie, but I think it could look very good. I've always loved that tank. Make sure to post plenty of pics, and give details about how you eventually did it.
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post #25 of 47 (permalink) Old 01-31-2012, 08:49 PM
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Doesn't say what year the tank is, just described as "vintage"

http://www.bikeexif.com/triumph-bonneville-custom-6

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post #26 of 47 (permalink) Old 02-01-2012, 11:35 AM
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It looks like a Triumph T100 Daytona tank about , 1970 - 71 from the side .

I take it back , i have just seen the top view its a , 1973 US T140 . www.triumphbonneville.com look at the Gallery

" Triumph Bonneville " - What more need be said .

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post #27 of 47 (permalink) Old 02-03-2012, 06:59 AM
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Doesn't say what year the tank is, just described as "vintage"

http://www.bikeexif.com/triumph-bonneville-custom-6

Exactly what I'm talking about! I ran across this in my continual internet scouring in search of modern bonnie customs! Last night I was stripping part of the old paint off of the old tank. The tunnel width really appears to be good (wide enough)- one possible problem is the new Triumph tank rubber studs- I'd rather not remove them- If I get real lucky they'll be enough clearance. Using an original new Triumph seat would be problematic with the old tank tang... I'll take some good photos as I get into this whole thing.
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post #28 of 47 (permalink) Old 02-08-2012, 08:57 PM
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Okay- I started messing around with this concept tonight. My goal was to be able to at least drop the old T140 tank over the frame before I whacked the tunnel all out of it. To do this I did have to trim back the tube that holds the front mounting rubbers on the frame. This seemed the least "impact" and could be easily fixed to return to stock if desired.
This is that tube before:


This is it after trimming a bit over a half inch off each side:

Last edited by tandawg; 02-08-2012 at 09:01 PM.
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post #29 of 47 (permalink) Old 02-08-2012, 09:06 PM
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After freeing the massive wiring harness from it's holders and routing it on top of the frame (this required disconnecting the horn wires) I was able to drop the T140 tank over the back bone:




It's very tight with the harness and those little half tube spars that run up near the steering head.
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post #30 of 47 (permalink) Old 02-08-2012, 09:12 PM
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For the fun of it I grabbed my Manx tank off my Commando and tried it out as well:


I'm sure everyone will think this is badass but to be honest it doesn't quite fit right and would require a much shorter seat. I haven't ruled it out but... I think I like the T140 tank better.
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