Thanx for your replies.
I ve heard about changing oil (put a thicker one) and putting stronger springs like WP ones : that s what i did actually with my R100 GS PD when i was travelling around. And you do feel the difference.
Now about my R80G/S : the easiest would be to put R100 GS front forks, change oil and put stronger springs. What are the brands, models, lengths, diameters of the R100 GS and the R80G/S forks ?
A friend of mine (I met him in India : pictures on http://vincent.danna.free.fr/surlaro...decembre.html) is driving now a full HPN : he gave his R80G/S, ordered, waited for 2 years at HPN, he paid a big bill to get it transformed into a HPN: he has now a 300 mm Marzocchi M1 front forks, the rear swing arm was transformed (made longer).
Those top end forks, like Marzocchi, WP, Ohlins can be found second end quite cheap, when they come from KTM bikes or other cross/enduro bikes, which can be really exciting. But to put them on a R80G/S, as you wrote, there are a lot of modifications to be done (wheel, brakes, bearings, …) and when they are much longer than the original BMW forks, you need to make the spring arm longer to balance the bike and avoid damaging the gearbox, driveshaft and final drive. Also, I have the feeling that only a specialist or professional can do this.
I d like to know if there could be an alternative with short (like the original BMW length or just a bit longer) top end forks, like Marzocchi, WP, Ohlins : which models could be used ?
If anyone has done this before, any experience to share …
Thanx
Happy trails

NB : this friend with the HPN told me about other companies that can prepare/change your bike :
http://www.wuedo.de/menu_main/menu_main.html
http://www.witec-motorsport.de/
and SCHECK : but couldn t find the website

__________________
--
Vincent Danna

* www.va-project.com
Sept 2008 - dec 2009 : Voyage et art contemporain en Amérique du sud.

* http://vincent.danna.free.fr/
2002 - 2004 : Un tour du monde en moto.