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suspension guru I need you

Started by mastershake, August 30, 2014, 08:03:25 PM

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mastershake

Hi all, got a question with hopefully an answers. I want to delete the swing arm hoop on my 01 750/900 Monster and was wondering if anyone has tried it. I don't want to buy a 02+ swing arm, pivot and tie rod. I have two ideas:

1. Make a custom tie rod from the stock pivot to the center cross bar just behind the bottom shock mount and make a attachment point.

2. Make a mount under the seat that doesn't pivot for the top of the shock to mount, making it a non adjustable system and would look similar to the SS type rear suspension.

I would much rather do option two but I would like some input on concerns or if it's been done before. I have the means and skills, I work at a machine shop and also Stradafab.

Thanks

brad black

ktm run a linkless system on some bikes.  you'll just need to get a shock that works with the travel length you end up with and damping requirements.

changing the pushrod mounting point (option 1) will also require a change in shock set up as it will change the linkage ratio.
Brad The Bike Boy

http://www.bikeboy.org

MonsterHPD

I can not see exacttly what your option 2 would look like, but if you want to mkae it look like a SS type suspension, why not try to ducplicte the SS set-up as closely as possible? The SS´s work very well ....
Monster 900-2002 (sold, alive and well in the UK), 749R / 1100 HYM combo for track days, wifes / my Monster Dark 800-2003 (not entirely "Dark" anymore and a personal favourite) , 50% of 900SSie -2000 track bike for rainy days-now with tuned ST2 motor and Microtec ECU. Also parked due to having been T-boned on track.

Rudemouthsky

Quote from: mastershake on August 30, 2014, 08:03:25 PM
I work at a machine shop and also Stradafab.

Thanks

You work at Stradafab?? Lucky!!! I would clean the shop shitter for free just in return for occasional tutelage and some titanium widgets here and there. What are Randy's thoughts on this suspension project?
"while there is a lower class, I am in it, and while there is a criminal element, I am of it, and while there is a soul in prison, I am not free." -Debs

mastershake

I think I will modify the area under the tank and make a mounting bracket for the top of the shock and possibly move the mount on the bottom up a little bit on the swingarm. I think I was misleading on the supersport rear suspension, I was just using it as a reference for a link less suspension.

Buck Naked, we don't have a shitter in the shop  ;D. He thinks it's possible so that gives me some confidence, we have all ready converted a Sport Classic to accept a swing arm from a S4R.
This shouldn't be to bad  ??? And Buck Naked, sometimes your lucky enough to be the son of a fabricator and Ducati fan :D

thorn14

Don't quite understand option 1 from your description.

I know option two has been done before in two ways (at least.) But both used SS swingarms.

One I believe was Duck-Stew who added a frame member above the vertical cylinder head for the upper shock mount. I think it required some funny business with the bottom of the tank for clearance as well.

The other I think dubluv is doing where the shock mounts to the vertical head itself on the valve cover with a bunch of special engineering and theoretical number crunching.
M620 turned M800 but then back to M620 after the M800 died at 110k, and now to Multi 1000.