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View Full Version : Rigid_EVO Ohlins steering damper, Mock up fitting..


Big-Ed
12th February 2011, 16:23
Picked this ohlins damper up a couple days ago, its used but in very good condiction & can be easily rebuilt.. Its the SD200 (aka SD005) model (biggest they make) It has a stroke of 150mm. It has 16 settings from nearly nothing to very firm..

Seeing as I had some time off this morning, decided to try a little mock up to see if it can work on the sporty or not..

Made a quick bracket out of some flat stainless bar I had laying about & managed to buy a cheap 39mm fork clamp to do a trial/mock up..


http://i195.photobucket.com/albums/z251/Big-Ed-1983/IMAG0006.jpg
http://i195.photobucket.com/albums/z251/Big-Ed-1983/IMAG0007.jpg
http://i195.photobucket.com/albums/z251/Big-Ed-1983/IMAG0008.jpg


Its a close fit, but it is long enough for lock to lock movement & still has 1/2 to 3/4 inch free rod left.. Im working away again so will not have a chance to do much for a while, but at least I know it should work & work well.. But to anyone looking to fit a steering damper that is a universal fit, you will need it to have at least 150mm stroke.. I am hoping to have the whole bracket made up by the summer, but I will need to find a better way to mount it as I dont trust the one nut/stud on the head to take the strain.. I do have a spare original upper mount bracket somewhere that I plan to modify so the damper strain will be spread over the 4 bolts that are on the front upper mount bracket..

Big-Ed
12th February 2011, 22:10
Update:

Found the spare upper engine mount (only problem I have is I dont know if its an 883 or 1200 mount, there is meant to be a difference going by parts book) I got it in a box lot of sportster/harley stuff, was burried under the workbench i use...

I have found a piece of steel the same thickness as the original upper mount (came from a harley exhaust mount), cut it to the same half moon shape of the mount, cut angles in the mount & new piece to allow the weld to fill correctly, welded it together & then ground it flat..

Heres the result:

http://i195.photobucket.com/albums/z251/Big-Ed-1983/IMAG0012.jpg
http://i195.photobucket.com/albums/z251/Big-Ed-1983/IMAG0014.jpg

OrangeR
13th February 2011, 10:05
Picked this ohlins damper up a couple days ago, its used but in very good condiction & can be easily rebuilt.. Its the SD200 model (biggest they make) It has a stroke of 150mm. It has 16 settings from nearly nothing to very firm..........

But to anyone looking to fit a steering damper that is a universal fit, you will need it to have at least 150mm stroke...

That looks a nice unit. :clap I've just fitted a Daytona damper which fits above the lower triple tree. This unit only has about 110mm of usable stroke so you can get away with less than 150mm.

Here's a picture of the fitting instructions for my model, I thought it may help when working yours out. This is for a rubber mount fitment but they do use the same damper unit for solid mounts as far as I know.

http://i973.photobucket.com/albums/ae217/OrangeR_Photos/bracket2.jpg?t=1297590661

I hope this helps,

Cheers,

OR........

Big-Ed
13th February 2011, 11:14
That looks a nice unit. :clap I've just fitted a Daytona damper which fits above the lower triple tree. This unit only has about 110mm of usable stroke so you can get away with less than 150mm.

I hope this helps,

Cheers,

OR........

Hey OrangeR, Thats a handy instruction sheet, some rep coming your way & thanks too!!..

The idea for mounting it up there does mean you need a shorter stroke damper, so I stand corrected, now I know if you can mount it above the lower tripple tree, you dont need the 150mm stroke, but if you are mounting below it, you will need the longer stroke.

I tried a quick mock up earlier of having it above the lower triple tree, but ran into quite a big problem due to the sportster sport having a 4 output coil & has not much free space or mounting points around the coil area, but will see if I can use any of that area.. Ive ordered some rosejoint misalignment washers to ensure the joints can move freely without hitting a nut/bolt etc, & some stainless button & hex head bolts/washers/nuts for when I do the final fitting.

Big-Ed
1st July 2011, 00:03
Ok, been a while since I started a mock-up fitting, but having almost no free time & been trying to source some good quality fittings etc..

Have found that from the original mounting place is far to close to the front of the steering damper as can be seen in my pictures above, this caused the steering damper to want to twist & turn to much meaning it wasnt doing a correct job, it was losing about 1/4" of dampening with it trying to twist on its rose joints between swapping axis left to right..

I now have been trying to fit the dampers clamp closer to the position level with the spark plug or the front head bolt area..

I will not give up on this, just trying to find time in between work & wanting to ride the bike..

Bruce
1st July 2011, 17:45
Nice looking unit. I also have the Daytona damper. Mine is for a solid mount and mounts where you have your mounted. You might try rotating the fork mount around under the tree and slide the damper in the mount. It should let it rotate better. Just a thought.

Big-Ed
1st July 2011, 18:12
Nice looking unit. I also have the Daytona damper. Mine is for a solid mount and mounts where you have your mounted. You might try rotating the fork mount around under the tree and slide the damper in the mount. It should let it rotate better. Just a thought.

Cheers for the info Bruce, I did try & move it round the fork, but I think the main problem with the ohlins unit is that it has 2 rose joints (one at the moving shaft end & the other on the damper clamp mount) & that was causing the steering damper to try & turn out towards my leg when the strain from turning the bike right & then it would turn inwards towards the engine when turning the bike left...

I have a couple of waste saddlebag stand-off bracket things I got in a box of Harley stuff from ebay, so going to make a mount from one of them from the centre bracket where the choke knob is to the front engine mount bracket I extended, fit a couple of rose joint aligners (with o-rings to hold in correct orintation) & stainless fittings, that should align everything up & have it all working perfectly..

Im waiting on a engineering company to get back to me about a proper billet aluminium fork clamp with an offset angle already in it..

new2HDfrank
1st July 2011, 18:18
Big-Ed,

I mounted my damper to the 2-peice coil bracket on my 2007. I drilled a larger hole at the mount screw location. It is difficult to see in the photos.

http://i877.photobucket.com/albums/ab332/AHAMAYfrank/HD%20XL883R%202007/Steering%20Damper/P1010011.jpg

I also mounted my clamp above the lower triple clamp. I rotated it in because my damper has less stroke.

http://i877.photobucket.com/albums/ab332/AHAMAYfrank/HD%20XL883R%202007/Steering%20Damper/P1010012.jpg

I never need to run it up past 4 or 5 clicks of 10 and it works very good.

Frank

BWP 5p
5th July 2011, 13:16
Storz/Ceriani unit.

http://i364.photobucket.com/albums/oo86/BWP5P/100_2464.jpg

http://i364.photobucket.com/albums/oo86/BWP5P/100_1380-1.jpg

I can get a better pic of the rear bracket if you need it.

Big-Ed
5th July 2011, 13:56
Hey BWP 5p, Cheers for the offer to see the mount, think Ive solved some of my problems I came across..

So far I have cut up a saddlebag support stand-off thing (my prototype/mk. 1 test piece), got my billet 39mm fork clamp (started to polish it up).. Some of the fixings I ordered arrived.. Just need to get some time to figure out where everything is going & weld up the mounts to the support etc..