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Old 07-17-2017, 05:29 AM   #11
Seft
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Quote:
Originally Posted by Tmod View Post
Seals would be a top priority and maybe the bladder, Bladder is an inverted bladder so it is not the more common. Sometimes they are collapsed and cracked. The OEM shock really needs some decent valving as rebound is Waaaaaayyyy too slow in OEM form.
Ok, so my options here are to but a new aftermarket shock http://www.wemoto.com/bikes/suzuki/g...ies_monoshock/ for 280 which obviously isn't cheap. (I'd welcome any opinions on the YSS shock?) I can get an old 750 shock in what looks like good condition for about 80 but I'd need special tools to service it, what special tools would they be?

When you say needs some decent valving, this means absolutely nothing to me, what would be involved in doing this assuming it's something I could change?

When I've looked where I'd normally buy parts from I can't find any parts for the OEM shock, just the whole unit at over a grand so where could I get seals and a bladder from assuming I could also get the tools to replace them.

Just trying to work out if new aftermarket would work out cheaper/better than overhauling an old 750 one.
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Old 07-17-2017, 07:26 AM   #12
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Quote:
Originally Posted by Seft View Post
Ok, so my options here are to but a new aftermarket shock http://www.wemoto.com/bikes/suzuki/g...ies_monoshock/ for 280 which obviously isn't cheap. (I'd welcome any opinions on the YSS shock?) I can get an old 750 shock in what looks like good condition for about 80 but I'd need special tools to service it, what special tools would they be?

When you say needs some decent valving, this means absolutely nothing to me, what would be involved in doing this assuming it's something I could change?

When I've looked where I'd normally buy parts from I can't find any parts for the OEM shock, just the whole unit at over a grand so where could I get seals and a bladder from assuming I could also get the tools to replace them.

Just trying to work out if new aftermarket would work out cheaper/better than overhauling an old 750 one.
I'm not opposed to do it yourself, but you might want to consider contacting a local suspension shop (who would have all the tools, and know how to revalve for best results) and just get an estimate on a rebuild.

If nothing else, it's more info for you to consider and make the best choice from the options.

And +1 Tmod is the man when it comes to suspension. If you were in the US, I'd definitely be saying just send it to him.

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Old 07-17-2017, 11:28 AM   #13
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Quote:
Originally Posted by Seft View Post
I'd need special tools to service it, what special tools would they be?

When you say needs some decent valving, this means absolutely nothing to me, what would be involved in doing this assuming it's something I could change?

When I've looked where I'd normally buy parts from I can't find any parts for the OEM shock, just the whole unit at over a grand so where could I get seals and a bladder from assuming I could also get the tools to replace them.
You would need tools for seal removal and installation, Nitrogen pressurization regulator and bladder needle or schrader valve depending on what way you went. Torque wrench and some red 271 loctite. Also fluid and spray cleaner and a pick set.

With all due respect if it means nothing to you when I say decent valving then rebuild/revalve is not for you. Just buy new aftermarket. Valving is the arrangement of shims in various thicknesses in a certain order to arrive at the required damping for the rider/spring combination.

Suspension shops around you should stock the parts necessary for that shock as it is a Showa shock.
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Old 07-17-2017, 02:46 PM   #14
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Quote:
Originally Posted by Tmod View Post
You would need tools for seal removal and installation, Nitrogen pressurization regulator and bladder needle or schrader valve depending on what way you went. Torque wrench and some red 271 loctite. Also fluid and spray cleaner and a pick set.

With all due respect if it means nothing to you when I say decent valving then rebuild/revalve is not for you. Just buy new aftermarket. Valving is the arrangement of shims in various thicknesses in a certain order to arrive at the required damping for the rider/spring combination.

Suspension shops around you should stock the parts necessary for that shock as it is a Showa shock.
🙂 Point taken, do like to get my hands dirty but sounds like this isn't a job to just 'have a go at' for a pretend wannabe mechanic as myself 🙂 Is the shock sold based on the fit then as opposed to being set for the bike it's sold for and an 'average' rider?
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Old 07-17-2017, 04:09 PM   #15
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Quote:
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Is the shock sold based on the fit then as opposed to being set for the bike it's sold for and an 'average' rider?
Obviously fitment is the priority, But the valving and spring combination on the OEM shock is way off, The rebound is very slow in OEM form and that will lead to packing of the shock if you encounter successive bumps. Not the end of the world but the OEM kat suspension regardless of what year and model all leave a huge opportunity for suspension improvement.
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Old 07-25-2017, 05:55 AM   #16
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With all due respect if it means nothing to you when I say decent valving then rebuild/revalve is not for you. Just buy new aftermarket.
Really not sure where to go with suspension then, it seems that buying an old 750 shock and then getting it properly refurbished and set up by someone who knows what theye doing will cost around the same as buying a new aftermarket shock. So if I did get the new aftermarket shock to replace the 15 year old on that there what the minimum it would be sensible to do to the front? I know I need to replace the oil as it been there for far too long but would I need to replace the springs too and if so how do I go about choosing ones that would complement the new rear shock? I don have vast amounts of money to spend so really need to opt for the minimum approach here.
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Old 07-25-2017, 07:06 AM   #17
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I would respring for your weight.
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Old 07-25-2017, 12:36 PM   #18
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+1. Your old springs aren't going to be worn out or anything, they just likely weren't proper for your weight. The Kat suspension was set up for something like a 135lb rider. Odds are you weigh more than that so....

Racetech sells springs that are rated for different rider weights. Take a look at their website. I don't know if they ship to/have distribution to your part of the world, but you can at least find out what spring rate you need. Suspension shops in your neck of the woods should be able to get you springs of that correct rate. Here they sell for ~$120. If you weigh more than 170lbs, or ever do 2 up riding, it is very very worth it.

Even if you get an aftermarket shock, it will likely have the wrong spring on it for your weight, and the valving would likely be incorrect for your weight/riding style. I'm a cheapass, but holy $+✓! Upgrading the suspension is well worth it, night and day difference.
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Old 07-25-2017, 01:25 PM   #19
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Seft,

Respringing the rear is fine as it has the rebound to control it assuming we are talking the post 750 shock. Respringing the front is fine but will require a bit heavier fluid to slow the rebound down. Since we don't know your weight or at least I didn't see it we are not able to recommend a spring rate for you. All aftermarket shocks are not created equal and if you found a aftermarket shock for near the cost of a revalved OEM then it is probably a pretty cheap quality aftermarket shock and the piston design will be inferior to the OEM piston in the shock. Not to mention on the OEM post 750 you have preload, rebound and compression adjustability. Normally that ranges right about $1000 USD for a decent aftermarket.
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Old 07-25-2017, 01:51 PM   #20
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My R6 shock was under $100 and was fully adjustable. Huge upgrade over stock.
http://katriders.com/vb/showthread.php?t=117405
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