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Discussion Starter #1
I picked up a salvage title 1980 CX500. I'm planning a mono-shock cafe build. What OEM shock should I be looking for on ebay? TIA
 

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You have asked a question that justStates what yoy want to do with no design parameters Swing arm type linkage or no.linkage weight calculations Nothing no variables at all and you want a answer Dont be pissed at me i CANT help you yet Go do some research get some ideas,then Ask a,question that can be answered Until then i will watch
 

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Discussion Starter #9
Honestly no, you are just being a typical internet troll. This is my 3rd build. My first was a 1975 CB500T. Very fun. Scary cuz I had never done anything like it. My background is just modern sportbike racing (club level). So I am familiar with wrenching (and crashing) but new to these cool old bikes. My second build which I just sold to a guy in Boise Idaho was a 1978 CB750. Not as much fun. Had many problems from previous owner(s). This bike (CX500) I picked up so cheap I feel braver to take beyond just make her run again and look pretty. I already read all the write ups I could find in this forum. This isn't a super huge task. But what I was hoping for was a reply from someone familiar with this mod. I was hoping to hear something like "yea man for the weight of these bikes and the limited amount of travel and space allowed, most guys have been using xxx rear shock from a xxx bike". Every other forum I have been on I got really great feed back from super cool people. Even made a good online friend from the CB750 forum. But your reply was unexpected. I wasn't prepared for a cheap snarky comment like that. At least guelli02 tried to give a helpful response and I would surmise that english isn't even his first language. So yea, if you aren't going to be helpful please leave me alone. Thanks.
 

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Yeah, but... this will require an understanding of the force and moment applied to the shock, as well as the total travel, dampening, and spring rate.

Are you going to hoop over the rear wheel, with a shock between that and the spine?

Are you going to imitate the GL500 style swing arm and mount from in front of the rear wheel up to the spine?

Are you going to have a pull-type shock linkage mounted under the engine?

Do you weigh 120 kg with a 100kg pillion? Or will you make it a single seater?

Like Murray said, come with a design that can be evaluated, not just asking for the answer to an equation you haven't given.
 

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Discussion Starter #11
Yeah, but... this will require an understanding of the force and moment applied to the shock, as well as the total travel, dampening, and spring rate.

Are you going to hoop over the rear wheel, with a shock between that and the spine?

Are you going to imitate the GL500 style swing arm and mount from in front of the rear wheel up to the spine?

Are you going to have a pull-type shock linkage mounted under the engine?

Do you weigh 120 kg with a 100kg pillion? Or will you make it a single seater?

Like Murray said, come with a design that can be evaluated, not just asking for the answer to an equation you haven't given.
Fair enough, finally getting somewhere. I have only seen the most common method, similar to the GL? " imitate the GL500 style swing arm and mount from in front of the rear wheel up to the spine"

Yes single seater. Rider weight 180 ish pounds plus riding gear.

I intend to weld in a anchor point in the existing swingarm, in front of the rear wheel. Then weld on a new subframe and mount the top of shock to the subframe and install a classic cafe racer style plastic rear hump for battery. Probably similar seat as what I did with this bike:

https://goo.gl/photos/g5gVmcehKpcuGEvK7
 

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So, the way I did it was a GL500 swingarm heavily modified, with a custom driveshaft (front part of CX500 shaft and rear part of GL500 shaft). With the GL500 swingarm and linkage setup, a Hayabusa shock was absolutely perfect. Perfect travel, perfect spring, perfect damping, for a 220lb rider and a 110 lb pillion. Using a Hayabusa shock will require heavy modification of the GL500 lower shock mount, as the GL500 has a (very wide) clevis, and the Hayabusa shock has a clevis. I've used a 09-11 GSXR1000 rear shock, which has eyes on both ends, and that works too, but the spring rate is a softer and it has less travel. Still doable, especially if you're lighter or always riding solo.

I have no experience with monoshock mounts that just welds a shock mount to the swingarm and rear frame tube. I'd look for a bike that does it that way, and use the shock from that. There are kits all over eBay to give you that kind of setup, but I have no idea what shocks people are using with them. I do know the Hayabusa shock with a GL500 swingarm and associated linkagery gives an absolutely amazing ride. The suspension is the absolute best part of my 650 street scrambler. I daresay the rear is better than the front, and the front is really good.

Note that by going with the GL500 swingarm you're extending the wheelbase about 2 inches (hence the need for the custom driveshaft).

Charles.
 

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The common method results in a pogo stick It looks,cool but the,suspension does not perform well And a,custom shock and spring will be needed if ride is Important
this will be a 650 to 800 dollar item valved and sprung Properly
Or you might be able to buy the correct setup from someone Who has done all the development like bbcr engineering
or copy one of the bikes you like with the assumption that it does work
 

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Honestly no, you are just being a typical internet troll.

LOL that's the best line of the day! I sure Murray has been called worse, but I doubt he's ever been accused of being a troll. :vs_biker:
 

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Discussion Starter #18
I don't care for that design. Looks solid, just not what I want. Thanks. Not sure what the crickets thing is about. I worked all day and just got time to reply now. As for your earlier comment and Murray's comment, I am wondering how much "pogo stick" could be tuned out by a specialist? I mean assuming I can find a close enough shock... that isn't too expensive. (The shock you linked costs twice what I paid for the bike, lol) The right spring, shims, valves, whatever?
I have used Barry at GP Suspension NW on all my race bikes. That guy can take a bone stock new R6 and make it go from feeling like a Cadillac with busted shocks to a Formula Race car. Suspension tuning was always voodoo to me. I don't fully understand it. I would just tell him how the race bike was handling and he would turn screws and nobs on the forks and shock and walla the bike handles like a dream. *shrug* most everything else I would work on myself.
I came here thinking I would find friendly helpful guys that love riding and wrenching on bikes as much as I do. I don't understand why such an abrasive welcome.
 

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I'm not exactly a forum senior here but this is pretty disappointing to read.

Yes the question was extremely broad but it doesn't take any extra time to be polite.

"Did you have a design in mind and we can recommend something suitable".

This would be the polite thing to say instead we got this rubbish.

I expect better from the members here.
 
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