TOPIC:

So I happen to come upon a set a 76K 1343 KONI shocks. I’ve looked all over the place and can’t find any info on adjustments for this model. I see the three step preload but I don’t know if there’s any other adjustment. Stamped on the body is an arrow pointing right with the word ’heavy’. I’m thinking it has to do with some kind of damping. Anybody here know about these and it’s adjustments. Thanks.

Ill have a look at my old alloy bodied 7610 koni's tomorrow, i'm pretty sure there's damping control on the alloy piece at the top of the shock, do you have a rubber cover in that position ?  Pull it up and look for a 4 position black disc under it, its only on one side from memory...

The company is now called Ikon. They are made in Australia. The current models that have rebound adjustment do so with a fairly obvious wheel, though in the old days, that may have been different.

www.ikonsuspensionusa.com

Here’s what they look like. Looks like they have been repainted some time in their life.

I have no idea if any of this will help you or not, but there is an old post/topic here on KZR about rebuilding Koni shocks.  If you have not read or seen is as of yet I would suggest you take a look at it.  kzrider.com/forum/5-chassis/35294-koni-shock-rebuild-pics

Also found this on the SOHC/4 sited   forums.sohc4.net/index.php?topic=27828.0

Does this help

 

 

wrote:

Does this help

 

 

Yep, that's exactly the ones I have, the ones the op has look totally different, i can't see how they could have any damping adjustment  at the top.    Some more detailed pictures would be good.    

So I sent an email to KONI (IKON) along with the above picture and asked about adjustments. They sent back that I have pre 1978 shocks. Rebuild parts are no longer available. The only adjustment is the preload, no damping of any kind. They suggested not to use them. So I guess thats as far as it goes. Thanks for the posted help.

That’s not good. I bought used thinking they could be rebuilt. I better find out what boat I’m in. 

It looks like the same Koni model that came with my bike when I bought it in 1979. I've always used the middle pre-load setting and they have held up well for the 63,000 kms that I've added to the odometer. I don't think yours have been repainted, Zeerx, as mine are the same paint scheme.   

wrote:

That’s not good. I bought used thinking they could be rebuilt. I better find out what boat I’m in. 

If you have the adjustable shocks like in the pics you posted, they are rebuildable...

***UPDATE***

I opened my email and found another email from IKON/KONI. The one noted above was to the office in Australia. They must have forwarded it to the USA distributor. The one below is what I got. It goes into more technical detail about the shocks. I guess there is a damping adjustment on these units. It’s described in the text. 

I took the springs off and found the pistons move freely, no binding. But as far as the “12 oclock to 3 oclock” adjustment, there are no stops......I can turn the to eye all the way around. Not sure if thats the way it’s suppose to be or if something is broken inside. Anyway, here’s a little more info for the collective.




Hello Rich,

As Linda at the factory has pointed out, these shocks have been obsolete now for 35+ years, so parts availability is sketchy to say the least. 

To adjust the damping, you have to remove the spring first. Then, holding the top mounting 'eye' , rotate the top 'eye' of the shock either left or right. Note: there is very little movement in this action.  If it were a clock face, adjustment is (approx.) from 12 to 3pm. Rotating the body in the direction of the arrow you reference, will slow down the rebound damping. Turn it the other way will lighten the rebound damping.

These 76 series Konis are notorious for disintegrated internal rebound stops which fall apart over time. If once you've removed the spring, if you find it hard to impossible to compress the damper, that's exactly what's happened. You'll have to completely disassemble the unit to clean out the now plugged orifices full of 'melted' rebound stop. You're now getting into unavailable parts which will have to be made. The piston rod seals are obsolete and were unique to Koni, so you will have to machine the gland nut (seal holder) to accept a different seal.

The only parts we carry in stock for the Koni 76 series are the large internal O ring, the upper and lower mounting bushes and springs. We do not service these units here in PA, only the Koni 7610 Dial-a-Ride series for which there is no parts supply problem.

For reference, a new pair of Ikon Basix (fixed damping) is $280/pr. and Dial-a-Ride 7610 series are $420/pr.

I hope this answers your question.

Cheers,
Roger

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