NX250 Rear shock absorber

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marcus
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NX250 Rear shock absorber

Beitrag von marcus » Do Apr 21, 2016 3:36 pm

Hi all,
I would like to replace my rear shock absorber, on my NX250 from 1990.
As everybody knows, the rear shock on the NX250 is too soft.
I'm looking for a cheap solution, a new one from another brandt, or a second hand from another bike ?

I have heard, that it's possible to install a shock from a "Suzuki 600 bandit", but it seems complicate to adapt it, to the NX.
Do you know one shock from another motorcycle, that could fit the NX250, without cutting anything on the shock.

I'm 90 kg, and sometimes i travell with 40 kg of luggage.

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scrambler
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Re: Rear shock absorber

Beitrag von scrambler » Do Apr 21, 2016 7:51 pm

marcus hat geschrieben:Hi all,
I would like to replace my rear shock absorber, on my NX250 from 1990.
As everybody knows, the rear shock on the NX250 is too soft.
I'm looking for a cheap solution, a new one from another brandt, or a second hand from another bike ?
Hi Marcus,
I’ve doubt that very much that there is shock from another bike that would fit plug and play. And I’ve spend quite some time looking for a replacement and the Bandit shocks are almost perfect in terms of spring rate and damping (at least for street riding).
I’ve got a few already modified bandit shocks, meaning that they are plug_and_play. Given your weight of 90kg you may consider a GSF650 shock; it’s stiffer than the one from the 600 Bandit. With my weight of 80kg I found it to be too uncomfortable – so it’s up to you to choose – the 600 shock for full comfort or the 650 shock for lots of reserves for heavy luggage.
Cheers, Michael

marcus
Beiträge: 26
Registriert: Di Dez 15, 2015 7:23 pm
Wohnort: FRANCE - near Paris

Re: Rear shock absorber

Beitrag von marcus » Do Apr 21, 2016 10:46 pm

Thank you Michael

marcus
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Registriert: Di Dez 15, 2015 7:23 pm
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Re: Rear shock absorber

Beitrag von marcus » Fr Apr 22, 2016 11:14 am

And for a new shock, what is the choice and price ?

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scrambler
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Re: Rear shock absorber

Beitrag von scrambler » So Apr 24, 2016 7:33 am

marcus hat geschrieben:And for a new shock, what is the choice and price ?
Of course a new shock, tailored to your weight etc. is always the best choice. The cheapest Wilbers shock is the 540 for 350€, intended for street use only. For offroad use the 640 or 641 is a better choice (http://www.ebay.de/sch/i.html?_from=R40 ... 50&_sop=15).
The YSS shock with EG-approval (I don’t know if that’s required in France) comes for 300€. There is one vendor in spain (viewtopic.php?f=6&t=566) selling the YSS for 245€. But I don’t know if his shocks have EG-approval and if that vendor is trustworthy. He does not answer any questions in English.

marcus
Beiträge: 26
Registriert: Di Dez 15, 2015 7:23 pm
Wohnort: FRANCE - near Paris

Re: Rear shock absorber

Beitrag von marcus » So Apr 24, 2016 4:18 pm

Thanks a lot Michael,
In France we have SHOCK FACTORY
http://www.shock-factory.fr/mshock-amortisseurs.html

The price is 395 € ( delivered ), but I don't know if they have a shock for the NX250

marcus
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Registriert: Di Dez 15, 2015 7:23 pm
Wohnort: FRANCE - near Paris

Re: Rear shock absorber

Beitrag von marcus » Fr Mai 06, 2016 7:21 pm

Here is a video ( Installing a Suzuki Bandit Rear Shock on a 1988 Honda NX250 )
https://www.youtube.com/watch?v=c31c8yz_nMs

I have this shock ( below ) from a Suzuki 600 bandit from 2004, in my garage.
Do you think i can adapt it to my NX250 ( from 1990 ) like the guy has done in the video ?

Bild

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scrambler
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Re: Rear shock absorber

Beitrag von scrambler » Sa Mai 07, 2016 6:18 am

Yes, that's the correct shock, given that it is not defective it should do a good job ;)

I was always looking for a affordable replacement shock (not for myself but for the NX community - I prefer White Power shocks) from other bikes, but all I tried were still too soft (or too long or too short). Some time ago I stumbled upon a documentation of all White Power shocks ever build http://www.wp-germany.com/de/Kontakt/Downloads.html .
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Conveniently, the spring rate as well as the length of the shock is listed, so I could quickly check whether there are any suitable shocks. As said, most were too long or the spring rate not sufficient. But the GSF600 (type WVA8) shock proved just perfect, the length almost identical, spring rate a bit higher than White Power recommended and the damping is adjustable.
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Shocks from the Bandit 650 look similar, but the spring rate is way too high - only recommendable with a drivers weight above 200 lbs. Earlier 600 bandit (type gn77b) shocks are too short (and too soft). And the documentation confirms my impression that the white SV shock (shock to the right - type wvby) is too soft, the yellow (type av) comes close to what is recommended for the nx in terms of spring rate.
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The upper mount of the gsf skock is 30mm, so you have to grind it down to 25mm to make it fit into the NX250 frame.
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And the spring adjuster is in the way of the air box, so here is also a bit of modification necessary.
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And you need a longer bolt plus nut, since the lower link of the shock has no thread.
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The gsf600 shock proved perfect (even a bit to hard) for my weight of 80kg, even with the lowest dampening setting and intermediate spring preload. So I guess this shock could also take heavier guys, riding by two or doing some serios offroad stuff.

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