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Old 10-06-2015, 01:52 PM   #1
dan74
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Default Running a 45 springer on a big twin



I got this death trap springer in need of parts and need a little help finding the right bits. I believe it to be a bastardised 1948 WL springer. This is my first set so have no idea how these things are set up really, so there may be some missing parts i am not aware of.

My first obvious assumption is that it needs a set of lower springs. Do these things have to be run with inner and outer?

I do have another small pair of springs that came with it but they seem a bit too short to work as inner springs, unless they are supposed to have about an inch of free play ?

I'm intending on running this on a big twin. Are springs generally the same weight and tension across the range? Wondering if it's worth getting some slightly larger ones to tackle the extra weight if they're available?
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Old 10-06-2015, 06:41 PM   #2
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Default Re: Running a 45 springer on a big twin

Ha... I love this springer.

I have a similar springer that I intend to buy big twin rockers, springs, rods, guides and all and run it on my racked wishbone.

The set Im looking for is the four spring setup.
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Old 10-06-2015, 07:28 PM   #3
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I bought some springs a while back and I think I got them from Drag specialties I can"t remember.
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Old 10-06-2015, 07:33 PM   #4
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Default Re: Running a 45 springer on a big twin

man, that thing is buggered all to hell ain't it ?
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Old 10-06-2015, 07:47 PM   #5
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Default Re: Running a 45 springer on a big twin

Didn't we have this conversation before? I remember explaining what you need in a stock setup. All the springs are available from V-Twin or W&W.
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Old 10-06-2015, 07:53 PM   #6
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Default Re: Running a 45 springer on a big twin

dan74,
The lower springs are the cushion springs and the upper ones are the rebound springs. As far as I know they come in just a "stock" type of strength; I've never seen any "heavy-duty" ones.

The inner springs are like "overload" springs, and under normal riding conditions they have no effect on the ride.

I buy all of my springer rebuild stuff from either Colony Machine or tomsnosparts.

Geo.
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Old 10-06-2015, 08:40 PM   #7
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Default Re: Running a 45 springer on a big twin

dan74,
I see you're in U.K., check out Boon in the Netherlands. Same things as tomsnosparts here in the States.
Geo.
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Old 10-07-2015, 02:20 AM   #8
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Originally Posted by VonWegener View Post
Didn't we have this conversation before? I remember explaining what you need in a stock setup. All the springs are available from V-Twin or W&W.
We chatted about the clamp. I just need to know if there are any other parts missing now relating to the springs. I have what appear to be small internal springs but they are only 3.5" long and don't seem long enough to sit with any tension or pre load, I've found a pair of lower outer springs on eBay, trying to piece it all together instead of buying a full new set
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Old 10-07-2015, 02:21 AM   #9
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Cheers Wrench !
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Old 10-07-2015, 02:22 AM   #10
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man, that thing is buggered all to hell ain't it ?
Yep !
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Old 10-07-2015, 07:32 AM   #11
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Default Re: Running a 45 springer on a big twin

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Originally Posted by dan74 View Post
We chatted about the clamp. I just need to know if there are any other parts missing now relating to the springs. I have what appear to be small internal springs but they are only 3.5" long and don't seem long enough to sit with any tension or pre load, I've found a pair of lower outer springs on eBay, trying to piece it all together instead of buying a full new set
I think a whole set of good quality replacement springs is like $100 for upper and lower inners and outers,
it would be much easier to spend the $100 and have a nice set of springs in there and be done with it
most of the old OEM springs are worn and will sag (as they should be theyre literally 70 + years old)
plus you get everything in one shot and saves the headache of piecing it all together.

also a factory service manual will have a full diagram breakdown of all the pieces the springers came with from the factory if you need a reference
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Old 10-07-2015, 11:06 AM   #12
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Default Re: Running a 45 springer on a big twin

why is the stem separate?
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Old 10-07-2015, 01:00 PM   #13
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Default Re: Running a 45 springer on a big twin

thanks Ralph!
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Old 10-07-2015, 01:03 PM   #14
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Default Re: Running a 45 springer on a big twin

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why is the stem separate?
It's basically got a modified lower sportster yoke which bolts into place instead of the original stem. You can see all the other hashed up bits and bobs on the designated springer thread, the poor thing has been tortured over the years
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Old 10-07-2015, 01:36 PM   #15
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Default Re: Running a 45 springer on a big twin

I kinda like the old mess....got a soft spot for funky springers.
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Old 10-07-2015, 02:59 PM   #16
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Default Re: Running a 45 springer on a big twin

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I kinda like the old mess....got a soft spot for funky springers.
Ive warmed to it too. At first i thought there's no way i'm running that, but now i can see how it all fits together i think it might just be ok. Its a chopper right!?
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Old 10-07-2015, 03:17 PM   #17
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Default Re: Running a 45 springer on a big twin

Why don't you turn down the part of the stem that still has the Sportster lower attached to it. You would gain necessary length for your stem.
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Old 10-07-2015, 03:29 PM   #18
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Default Re: Running a 45 springer on a big twin

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Why don't you turn down the part of the stem that still has the Sportster lower attached to it. You would gain necessary length for your stem.
Yes this is the way forward in the long run, but i figured as i'm running this on a BT i might as well go with a 1" stem, so i'm on the lookout for a lower FX yoke
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Old 10-07-2015, 03:37 PM   #19
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Default Re: Running a 45 springer on a big twin

You can harvest a stem out of a wide glide yoke as well.
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Old 10-07-2015, 08:02 PM   #20
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Default Re: Running a 45 springer on a big twin

the inner springs are shorter than the outers and are kinda like overload springs. the inners are also bent in the middle, so they don't rattle.
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