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Ironhead Sportster Motorcycle Talk (1957-1985) For all those that wanna talk about Ironhead Sportster Motorcycles

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  #21  
Old 25th June 2018
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sounds like yours don't need rebuilt but a leaky weld gone over? they should be disassembled first,but this wouldn't even require new parts?
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  #22  
Old 25th June 2018
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Quote:
Originally Posted by Whitewalls View Post
I thought I was on track to get a new set from Hagon. They emailed yesterday saying they cannot make shocks for my '71CH because of the 5/8 holes.
Slow your roll, my friend.

Unless I'm missing something, Hagon uses regular old rubber shock bushings in the eye.

I'd have to see them in hand; but the most common construction is either a metal or composite "sleeve" inside the rubber bush so the shock stud doesn't wear the rubber out (quickly).

The trick is to press the rubber bushing out of the shock eye. Most of the time, the sleeve will separate from the bushing when each component is brand new. It's usually a bit of a fight, but if you make up a press tool -- they come out with a wee bit of tearing to the bore. This is ok because our next step is to use a sharp drill bit to enlarge the hole, and press in a new 5/8 sleeve.

However, some newer bushes are molded around the sleeve -- and so you have to be more creative.

The trick there is to press the rubber bush out of the shock eye, then chuck them in the lathe and skim them out from 1/2 or 13mm to the 5/8 you need. You can also do this with a good vice and a drill press -- just make sure your drill bit is VERY sharp as we are cutting the sleeve out bit by bit. I'm not blowing smoke here -- I most recently did this to run a set of shocks I liked on my 79 Guzzi. The bushes were 2mm too small . . . .

If you really want it done, you can also buy rubber or urethane and make your own bushes. I've done it a few times out of oversized bottle stoppers from the chemist. I've also done it out of left over delrin. I honestly never noticed a difference between rubber and delrin bushes other than the delrin would "squeak" when cold.

You can also just type in "shock bushing" and you'll be surprised what comes up.

https://www.jegs.com/i/QA1/122/B6031...iABEgItKPD_BwE



This is one of those times where you may need to be a bit creative and out of the box to get what you want off the shelf.

You can also just make new shock studs in 1/2" . . . if you have a lathe and a little patience. I've done that on a few bikes -- most recently my duoglide frame so I could run Showa airshocks.

Don't let something as silly as the bushing size slow you down.
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  #23  
Old 25th June 2018
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Quote:
Originally Posted by brucstoudt View Post
sounds like yours don't need rebuilt but a leaky weld gone over? they should be disassembled first,but this wouldn't even require new parts?
Not that simple. The struts are oil filled and nitrogen charged.
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  #24  
Old 26th June 2018
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The "K-Tech Razor III Lite shocks" have 1/2" holes like late 75-78 XL, when I rebuild older XL's I always change to the late shock studs,
I try to find Showa shocks late 75-78 XL on swap meets, they are often really fine and people have replaced them to lower shocks or hard tail so they cost almost nothing.


XLCH 1971 with "Showa"


XLH 1978 with a better image with "K-Tech Razor III Lite shocks"
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  #25  
Old 29th June 2018
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Quote:
Originally Posted by Chuckthebeatertruck View Post
Slow your roll, my friend.

Unless I'm missing something, Hagon uses regular old rubber shock bushings in the eye.

I'd have to see them in hand; but the most common construction is either a metal or composite "sleeve" inside the rubber bush so the shock stud doesn't wear the rubber out (quickly).

The trick is to press the rubber bushing out of the shock eye. Most of the time, the sleeve will separate from the bushing when each component is brand new. It's usually a bit of a fight, but if you make up a press tool -- they come out with a wee bit of tearing to the bore. This is ok because our next step is to use a sharp drill bit to enlarge the hole, and press in a new 5/8 sleeve.

However, some newer bushes are molded around the sleeve -- and so you have to be more creative.

The trick there is to press the rubber bush out of the shock eye, then chuck them in the lathe and skim them out from 1/2 or 13mm to the 5/8 you need. You can also do this with a good vice and a drill press -- just make sure your drill bit is VERY sharp as we are cutting the sleeve out bit by bit. I'm not blowing smoke here -- I most recently did this to run a set of shocks I liked on my 79 Guzzi. The bushes were 2mm too small . . . .

If you really want it done, you can also buy rubber or urethane and make your own bushes. I've done it a few times out of oversized bottle stoppers from the chemist. I've also done it out of left over delrin. I honestly never noticed a difference between rubber and delrin bushes other than the delrin would "squeak" when cold.

You can also just type in "shock bushing" and you'll be surprised what comes up.

https://www.jegs.com/i/QA1/122/B6031...iABEgItKPD_BwE



This is one of those times where you may need to be a bit creative and out of the box to get what you want off the shelf.

You can also just make new shock studs in 1/2" . . . if you have a lathe and a little patience. I've done that on a few bikes -- most recently my duoglide frame so I could run Showa airshocks.

Don't let something as silly as the bushing size slow you down.
I have done exactly what you describe. Sometimes it easier to swap the bushings with insert out completely. If your old ones are good. As Chuck says, it not that hard of a mod.
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  #26  
Old 17th July 2018
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I decided to keep the bike original looking. I found a set of shocks on Ebay from a 1968 XLH. Chrome caps with black springs just like my bike originally had. Very good condition with excellent chrome, no rust or leakage. I disassembled, cleaned , painted and installed new bushings. A grand total of $140. They are much firmer than the Progressive 412's and ride great. The biggest difference is the original shocks are 14.5 inches compared to the 412's at 14.25 inches. The 1/4 inch and extra firmness makes a huge difference. I no longer have a chain clearance problem with the oil tank.

I located a suspension shop in New Jersey who can rebuild original Ironhead shocks. Which requires cutting open the internal shock. They quoted $300 for a complete mechanical rebuild for a set. Mechanical plus cosmetic including paint and re-chrome around $500.
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  #27  
Old 18th July 2018
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> I located a suspension shop in New Jersey who can rebuild original Ironhead shocks.

Care to share the name?
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  #28  
Old 18th July 2018
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I had these springs powder coated last winter thirteen and a half inch


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  #29  
Old 18th July 2018
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Quote:
Originally Posted by GA_Ironhead View Post
> I located a suspension shop in New Jersey who can rebuild original Ironhead shocks.

Care to share the name?
EPM Performance. EPMPERF.com
The guy to contact is Klaus. He told me he is very busy this time of year. The best time to send the shocks for rebuild is Nov-Feb.
I cannot vouch for the work but he seems very professional and he personally restores vintage bikes. This is the only shop I have found anywhere that will rebuild old shocks.
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