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Old 10-30-2012, 02:43 PM   #1
ModernDiesel
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2006 z750s susp. Upgrades?

My only complaint about the bike is the uber soft suspension. It has 17,000 on it, mostly commuter miles from the previous owner. I've put 3500 on it...ridden hard and put up wet and she's starting to go soft on me, to the point of rear adjustment (front is non adj) doing nearly nothing.

I'm tired of the excessive nose dive and rear squat. I want predictability and a firm ride for the track...don't really care about ride comfort. Do I have ANY options for swaps, like SV guys putting gsxr forks up front? I'd rather not buy some crazy expensive aftermarket stuff

I use Pruitt springs for truck stuff and they can tell me coil spring rates and sizes etc, re arch leaf springs and build just about anything needed for carrying a load on wheels. I'm thinking about having the coil spring checked and perhaps have one made that is x% stiffer.

I'm sure amongst all things both front and rear could use a recharge, but I want a more aggressive suspension than stock. I know my nekkie bike isn't ideal for building for the track but it is what it is for now.

HELP PLEASE!
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Old 10-30-2012, 03:21 PM   #2
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Old 11-01-2012, 07:34 AM   #3
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Thanks T-nasty
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Old 11-01-2012, 07:57 AM   #4
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the z750 has 41mm forks, same size as 650r and sv650.
You could look into getting early sv650 top caps with pre-load built in. I'm not positive they'll fit, but something to look into. This would be the cheapest thing. They do fit the 650r, you may have 650r forks on that bike... dunno.

Also, you may not need stiffer springs, but different valving or thicker oil... there's MUCH more than just spring weight.

Z750 the same as z1000? Don't those guys swap in SS (zx6/zx10) forks? A junkyard or used entire front-end might be a possibilty... though you'd still need to do oil, seals, and maybe spring for your weight. Might need to figure out what to do about top triple versus which bars you want to use (dunno if you'd want clip-ons). Maybe riser clip-ons to get above the factory plastics?

I've been happy with my proper weight racetech springs, oil, and Gold emulators in my 650r. Thanks Trey/Motorcycles Unlimited! But I also don't track the bike... it's full-on commuter/weekend country road carver.
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Old 11-01-2012, 08:10 AM   #5
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Old 11-01-2012, 08:43 AM   #6
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lots can be done internally to improve both forks and shock even the non-adjustable variety.


However, this stuff isn't free.
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Old 11-01-2012, 09:24 AM   #7
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Yeah, the issue is whether you want all internal stuff that isn't adjustable... or if you want to be able to tweak it later easily. Do your HW, and you shouldn't change the geometry by swapping front-ends.

I knew I wouldn't touch it, so having Motorcycles Unlimited put in the internal stuff and just ride was good enough for me.

BTW, I was wrong... the z1000 already has the upside down forks... so maybe swap on their forks? Not sure on how adjustable they are. I don't know much about the z750/z1000.
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Old 11-01-2012, 09:26 AM   #8
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I'd wager that most trackday guys get their suspension dialed once, and then just pretty much leave it alone. Racers might need to make minor tweaks for different tracks. However, until you get that fast a "set it and forget" setup should be plenty good enough.
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Old 11-01-2012, 09:31 AM   #9
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yeah... but you said "dialed"
Did they make several adjustments, maybe change the oil, on the way to setting it?
THAT is wear it would save you time/money, which is what i was thinking of... though didn't post it.

For me, I'm not that in-tune with my bike. I'm a noob on a commuter bike.
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Old 11-01-2012, 09:38 AM   #10
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I would see what parts you need to swap some ZX6R forks and what rear spring/shock is interchangeable. It's very popular with the Z1K's
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Old 11-01-2012, 09:42 AM   #11
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Quote:
Originally Posted by chevy42083 View Post
yeah... but you said "dialed"
Did they make several adjustments, maybe change the oil, on the way to setting it?
THAT is wear it would save you time/money, which is what i was thinking of... though didn't post it.

For me, I'm not that in-tune with my bike. I'm a noob on a commuter bike.

The bulk of "dialing" is decided by the rider weight, though: you need so much spring to set sag correctly, and so much rebound damping to control that spring. So there's some tweaking, but not a lot if the suspension tuner knows his .

Well, until you get to racers who want more/less feedback and the bike to "feel" a certain way.
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Old 11-04-2012, 02:54 PM   #12
ModernDiesel
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Thanks for all the info guys. Can't wait to put a shop to work on this pig.
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