Preload adjustment on Hyo 250

[disenfranchised]

I've just done a fender eliminator mod on my hyosung...could be a bit tidier but it'll suffice for now.

Except the number plate is now perilously close to the tyre.

I haven't any evidence that it can touch the tyre yet.
With my parner bouncing the rear it as hard as she could I saw it get to within 1-2mm though.

When I sat on it and bounced, I could feel something thud occasionally..but I'm not sure if it is the plate touching the tyre, or the suspension bottoming out.

In any case, I thought it might be an opportunity to play with the rear shock.

Anyone here made preload adjustments to their Hyosung 250?
I've read that it's quite tricky to do...so anyone with handy hints??

[Fub@r]

Got a picture?

I did a rear fender mod and my number plate is no where near my tyre.

[WarlockNZ]

What Fu said, pics ... your plate should be no where near your tire.

As for the shock, it's the same as every other shock, of it's type .. you need the right tool and just compress or de-compress the spring.

[disenfranchised]

Here's pics of where the plate is....but this is with no load.

When I sit on the bike the rear sags by something like 20mm.
Cause it looked close I was testing to see if full compression would touch...hence jumping up and down on the rear

[TOTO]

My manual says there is two positions for the shock - 1 and 2. There is a warning never to put it on 3... so I dont know if you can make it more than 2.

[deanohit]

With my parner bouncing the rear it as hard as she could


Got a picture?
What he said!:whistle:

[CookMySock]

As for the shock, it's the same as every other shock, of it's type .. you need the right tool and just compress or de-compress the spring.I use a spring compressor and squeeze the spring shorter until doesn't spring back so far ?

Does this soften the rear suspension or just lower the bike ?

TIA,
DB

[disenfranchised]

My manual says there is two positions for the shock - 1 and 2. There is a warning never to put it on 3... so I dont know if you can make it more than 2.

Positions???
Is like mounting points for the shock or something?

I thought preload was an adjustable plate threaded on the shock that the spring pushes against.
I was planning to tighten it up a bit to reduce how much the rear drops under weight

Like I used to do on my mountain bike

[disenfranchised]

I just had another (simpler) thought.
I might try and get some triangular section of steel, and put it between the bits I made and the rear toolbox...to rotate the plate out 45 degrees or so.

Still interested in trying some rear shock adjustment tho

[Macstar]

Hey mate, I adjusted my mate's rear shock on his Hyosung a few months back with my Suzuki tool (which is the same as my Honda tool). So any generic shock pre-load tool will work. If you want to borrow mine gimme a text - it will take approx 10 seconds!

0274476683.

To do a proper rear shock setup i.e. setting the static and loaded sag would take a little longer but we could maybe do that too.

Problem with the Hyosungs is that the front shocks are not adjustable, and if you tighten the rear up it puts more load on the front shocks which then could go all mushy under the extra strain...

Anyway, leave it with you.

[CookMySock]

Hey mate, I adjusted my mate's rear shock on his Hyosung a few months back with my Suzuki tool (which is the same as my Honda tool). So any generic shock pre-load tool will work.ok so this is a trivial thing to get done at the bike shop then ?


Problem with the Hyosungs is that the front shocks are not adjustable, and if you tighten the rear up it puts more load on the front shocks which then could go all mushy under the extra strain... eh ? Usually the problem with the GT250R is the rear is too HARD, even on its' softest setting, unless you are of the massive category. Tis with ours anyway..

Might take teh mrs' one into town and have a yak with them about it coz its really really really firm, and fully extended - right out even!

Maybe it just needs a little squeeze.

Thanks for that - tis the first time I have heard this procedure described.
DB

[Macstar]

ok so this is a trivial thing to get done at the bike shop then ?

eh ? Usually the problem with the GT250R is the rear is too HARD, even on its' softest setting, unless you are of the massive category. Tis with ours anyway..

Might take teh mrs' one into town and have a yak with them about it coz its really really really firm, and fully extended - right out even!

Maybe it just needs a little squeeze.

Thanks for that - tis the first time I have heard this procedure described.
DB

Yeah, I'd be surprised if a bike shop charged for a quick preload adjustment - however a proper suspension setup takes much longer and would be chargeable.

My mate weighed around 85kgs so it was a case of stiffening the shock - they're usually generically setup for a 60-70kgs rider. In-town riding I guess soft is good, but then out on the open road, or if your pushing the bike harder you'd want a stiffer setting. I find I have to adjust mine each time I take my girlfriend on the back for open road riding. As I said though it takes 10 seconds each time.

[xwhatsit]

ok so this is a trivial thing to get done at the bike shop then ?

Yep -- or you could buy/borrow one of these for a few dollars. All you need.

[disenfranchised]

Well I went for a ride...and didn't notice any probs.
Found a streak of black sticky stuff smeared up the center of the number plate when I got back home though.

If it had been the left side, I might have ignored it as chain grease..but being smack dab in the center, I'm sure it tyre instead.

So I made a couple of little angle brackets, and put those on...plus gave the number plate a firm pull out and upwards...bending the brackets out as far as they would go.

End result seems a lot safer than before.

I might ask at my shop next time it goes in about the suspension adjustments.
It would be nice to raise the rear a little without making the suspension any firmer.

[blacksheep]

have you still got the number plate light on there,if not you will need one for wof.you will also need to attatch the reflector back on somewhere as well.not wanting to rain on your parade or anything:)

[disenfranchised]

have you still got the number plate light on there,if not you will need one for wof.you will also need to attatch the reflector back on somewhere as well.not wanting to rain on your parade or anything:)

Still got the light....or rather a trailer one I got from repco.
Wasn't sure about the reflectors...so have nothing at the mo...but I suspect I could get some small pushbike ones and stick em on with double sided tape or something.

Unless they have to be a certain size to qualify for a WOF???

Just took a quick look where a reflector could go and it's obvious really...onto the back of the number plate light.
You can see it in the phot...the black box above the plate.

[Macstar]

I've now been pulled over twice in the last 4 days in Akl. Once was fair enough i.e. speeding on the motorway - at which point the copper examained my modifed plate and proclaimed it legal "just". Today, another copper pulled me over, this time I wasn't be my normal good self i.e. not speeding:rolleyes:, turned out he wanted to tell me my plate wasn't legal in his opinion. I did mention that another cop had approved it & the LTSA via a WOF inspection, but he wasn't interested. He took my details and told me to restore it to original.

F#$K knows really. Guess I get a consensus i.e. wait for a 3rd cops view!! Your plate should be right, though yes a light and reflector is a must for these over zealous highway men.

See here (http://www.kiwibiker.co.nz/forums/showthread.php?t=69505)for apicture of my mounted plate

[CookMySock]

Thanks. I already one of those tools. Its on the lowest setting now - still too firm by a long way.

thanks,
DB

[WarlockNZ]

LOL .... what a difference changing the angle of the plate makes.

I'm glad you spotted the problem and fixed it :)

[Dodger]

Had my Gt250 in for it's 20000km service on Friday.
As part of the server I've had the rear shock put onto it's firmest setting.

Reason for this is that the bike will be ridden 2up now as the wife is commuting into town with me. The change has made the Bike feel much better (almost lighter), and I highly recommend the change if you do a lot of 2up riding.

1up it's a little harsh, but nothing that I can't live with :)

Plan is to get a bigger bike in the future (and keep the GT250)