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Cheap suspension Ideas for 105lbs Rider on ZX6R
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Question Cheap suspension Ideas for 105lbs Rider on ZX6R - April 30, 2015, 10:20 AM

So a friend of mines on a new zx6R complained about how hard the bike rides.
I pretty much ZEROED the full suspension.
fork preloads, ten/comp shock...everything set to zero.

After that I tested the sag when she sat on the bike and it only went down

0.25 inches (quarter of an inch) vs. about 1.25inches.

As a cheap way to get the bike closer to her weight, I figured she could buy a raetech rear spring (i think its a 85kg) for about $130.

As far as the forks I was thinking this.

DO you think if she had the OEM springs left in, but replaced the stock oil with a lighter weight oil (lover viscosity) that might make the forks work better for her weight?

That combined with using a little less oil in the forks?
or maybe OEM weight fork oil with just a few milliliters less? would soften up the front?

I know this all works in reverse / heavier rider...


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April 30, 2015, 10:43 AM

I think the lower weight oil would just lessen the damping, not lower the spring force, and would actually make the situation worse, creating more of a pogo effect.
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April 30, 2015, 10:47 AM

105lb rider gets a zx6r for street riding? Seems like the wrong bike for the job..

They should bring the ZZR back
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April 30, 2015, 10:55 AM

I think the oil is 5w so, I'm not sure you can go much lighter. Also, as mentioned, the oil should not impact sag/pre-load. You probably already know this, but you can dial up the rebound a bit and open up the compression so the bike takes the bumps a bit smoother, just don't take it too far. On the positive side, with SFF, you should only need to buy one fork spring.


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April 30, 2015, 11:41 AM

Yea the bike is not meant for a 105lb rider. Lower Rated Springs are need all around. Probably be around $200 in parts, if you or her can do the work.

Another option is to put 80lbs of sand in the back, like a pickup truck in the winter...


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April 30, 2015, 12:04 PM

Quote:
Originally Posted by Thomas View Post
I think the oil is 5w so, I'm not sure you can go much lighter. Also, as mentioned, the oil should not impact sag/pre-load. You probably already know this, but you can dial up the rebound a bit and open up the compression so the bike takes the bumps a bit smoother, just don't take it too far. On the positive side, with SFF, you should only need to buy one fork spring.
Wouldn't you turn the compression and rebound down and not up?
I turned everything to the lowest (softest) setting...again it help allot, but rear only sag quarter of an inch.

The thing is this....
Stock the bikes comes with a progressive spring that is made to take a range of
140lbs to 160lbs'ish up front.
and all bikes are made to carry a passenger so the rear springs are set up for about 220-240lbs or more woth of riders weight.

I figured with the rider being so under the weight of the stock springs...going with a lighter weight front fork oil would help.

but if it is using 5w....then there is nowhere else to go...

yeah ideally fork and shock springs is the way to go.

of course that's what id do...


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April 30, 2015, 12:05 PM

Quote:
Originally Posted by pnbell View Post
Yea the bike is not meant for a 105lb rider. Lower Rated Springs are need all around. Probably be around $200 in parts, if you or her can do the work.

Another option is to put 80lbs of sand in the back, like a pickup truck in the winter...
i thnk i priced it at $300 for all 3 springs on racetech site.

one thing I donot do is forks sad to say.


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April 30, 2015, 12:30 PM

FOOK racetech! try this place. i get all my springs from them. Home - Cannon Racecraft

Going with lighter fork oil wont help much. also the valving will be so off with the light springs you can play with the settings all day and i doubt you will see much difference.


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April 30, 2015, 01:28 PM

Quote:
Originally Posted by dodge131 View Post
FOOK racetech! try this place. i get all my springs from them. Home - Cannon Racecraft

Going with lighter fork oil wont help much. also the valving will be so off with the light springs you can play with the settings all day and i doubt you will see much difference.
What do you recommend?

sounds like changing the rear is no issues and solves half the problem...
but fork wise...
maybe not go too low on spring weight? say get it set for maybe 115lbs?


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April 30, 2015, 01:38 PM

Take her to taco bell, KFC, and pizza hut.....a lot.

Or put a ring on it.

BAWAHAHAHAHAAH



(I know, I'm going to hell. Soon if she reads this.)


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April 30, 2015, 02:15 PM

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Originally Posted by MudDawg View Post
Take her to taco bell, KFC, and pizza hut.....a lot.

Or put a ring on it.

BAWAHAHAHAHAAH



(I know, I'm going to hell. Soon if she reads this.)

ps: TTR230 sold in 2 days....

now to find a 07 WR250F


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April 30, 2015, 02:29 PM

Quote:
Originally Posted by vonstallin View Post
ps: TTR230 sold in 2 days....

now to find a 07 WR250F

Let's get a move on that dirtbike. I rode for the first time last weekend. I need a lot more seat time soon to get back in shape to race and adventure ride this year. Plus my daughter wants to try more riding. I'm thinking a family Wico day might be in order. *Maybe* a run to Tomahawk, but even that has some places I don't want her on just yet.


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April 30, 2015, 02:30 PM

So, when you turn the clickers "out" (soft/lefty loosey) you are usually lessening the flow of oil through the dampening valve(s)/shims. When you turn them "in" (hard/righty tighty), you are increasing the flow directed through the shims/valving = slowing the suspension movement in that direction.

Opening the compression (left/soft) will allow the springs to soak up bumps more and slow their natural compression less.

Closing/Right/Hard on the rebound will slow the action of the spring when it's fully compressed from the compression bumps on the road so the bike will not bounce back as hard. Just don't over do it, or the suspension will pack (unlikely though if she is not railing on the bike or riding on really rough pavement).

Hopefully that makes sense.


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'07 ZX-10R - 156 RWHP/182 MPH
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April 30, 2015, 05:52 PM

At that weight, maybe just remove one of the fork springs and let the other handle the load. Joking sort of anyway.

Too much spring and too little damping is worse than too much spring and a reasonable amount of damping.


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April 30, 2015, 08:16 PM

Quote:
Originally Posted by 2blueyam View Post
At that weight, maybe just remove one of the fork springs and let the other handle the load. Joking sort of anyway.

Too much spring and too little damping is worse than too much spring and a reasonable amount of damping.
if the springs are not really moving at all....
what is getting dampend...

example if I put either of yall on a bike set up for a 375 pound rider...
and you sit on the bike and it do not go down at all....

whats getting dampend?


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2016 ZX10R ABS (Street) | 2011 ZX10RR(Race)
2011 R6 (Street & Track) | 2009 WR250F
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