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Post by trashman36 on Jan 30, 2020 7:30:52 GMT
Ok guys anyone have any detailed pics of cutting and replacing the tank on a bubble nose. Thinking of using an oly tank out of a 71 or 72. Can this be done or is an elan tank the only way?
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Post by olyman on Jan 31, 2020 23:47:16 GMT
The Elan tank does fit the best mainly because it's lower in the belly than the oly tank. That makes it much handier trying to re-mount the handle bars. I did two sleds now, and like the 2nd the best. Actually bought a new Elan tank from Royal distributing for about 115$ or so a few years back now.
Welded up a new support off of some new angle iron on the edge of the tank hole. Used 1" square tube (its what I had) and welded on a bushing thing from an old donor (you can use the one from the tube you cut out). It takes a bit of fooling around to get the right angles, but can be done. I was also able to rig up a filler tube to allow filling in the normal hood hole. That by far took me the most time. Used a few steel tubes cut up, a plastic pic elbow, and a random rubber rad hose I got from parts source. Just looked for one with a good bend in it.
First sled I didnt bother with all that tube stuff and just made the hood removable. Done.
I'll post some pics in a bit.
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Post by olyman on Feb 1, 2020 15:28:08 GMT
Started cutting into the tank, and it was a disaster inside. Full of some kind of smelly liquid from the 70's or early 80's...   So I opened up the hole nearly the entire way around the tank size, and bent the back lip up a little just in case. Made up this rig and placed it / trimmed until I liked it   used an old tank for fitment. Welded on a socket for the steering shaft to sit into   Added in the new tank, and put a little bit of thin stickyback foam to protect the tank and snug fit it. Put an inline filter in because I can, but tried to hide it somewhat.  drilled a hole through the square tube and put a bolt through to hold the new steering support strap (from a ~68 or so), and also a re-bent hold down strap for the gas tank. That's some thick shrink tube on it to be a little gentler on the new tank. Also made up a little metal hanger bracket thing to try and support the tube from ever sagging and causing problems.  Drilled the hood hole a wee bit bigger (2" I think) and put the rubber grommet in from a 69/70. Oh the gas cap on the tank is a bombardier one that I drilled a 2" hole in the top and forced a metal tube through. It takes patience getting that stuff lined up and figured out but worth the effort in my opinion.   The only pain in the a$$ problem I have now is the steering shaft is just a weeeeeee bit higher than it used to be at the bottom which isn't noticeable in all but one issue - the popup headlight touches it. So it won't release by pulling on the cable. It goes by with some force, but that wont last. I have to do some figuring there. Might just leave the light up forever if I have to. To answer the OLy tank question - it will fit into that location but you can see how the steering wont work with it. You would have to modify it quite a bit to get around that thick of a tank. |
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Post by trashman36 on Feb 5, 2020 0:26:17 GMT
Thanks for the info and pics. I'm hoping the 70 only im getting won't have tank issues. Never hurts to hope.
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Post by Doo640ER on Feb 5, 2020 1:03:09 GMT
Olyman, I'm assuming that's a 66 you're showing in those pictures? Nice work! What type clutch is on there. Doesn't look like the 3-pin like on my 67. The Hermit (who used to hang out around here) always promoted adding some (like 3?) large washers under the secondary spring to help the performance. I think he said it really helped on the downshift. Have you tried this? Sorry to hijack the thread, if I should start a new thread, please let me know.
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Post by olyman on Feb 5, 2020 3:34:42 GMT
Yessir thats a 66. Thanks for the compliments lads. Ya that's the original secondary clutch for a 66. Made those 6-pin secondary's from 60 to 66 (just the case changed). But 67 was kind of a one year thing with the 3 pins. That's a pretty good idea with the washers. To be honest I still havent driven this 66 so I dont know how it even works yet. Been too swamped trying to get the tnt done. Feel free to make up a pin clutch thread. Probably some good ideas floating around for it.
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Post by 1970tnt on Feb 6, 2020 0:19:03 GMT
IF YA DON'T WANT TO FAB UP A NEW STEERING LOOP BY THE TANK FIND A 71-73 15 INCH CHASSIE AND CUT OUT THAT LOOP AND REWELD IT ON YOUR CHASSIE
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