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Discussion in 'GS Boxers' started by Dorsicano, Feb 3, 2011.
Isn't that just what we said ... now get those accessories bolted on!
You can see the sensors on the bike. My guess would be is that they provide feedback for the on the go damper adjustment and perhaps they balance the spring pre-load front to back as well.
Yes, there are sensors, but not for preload just for dynamic damping.
Yes, that is probably true.
Sorry chaps Ive been away...
Youre both right - the preload adjuster is separate from the damper, using a motor/pump to increase/decrease the spring compression hydraulically and steplessly. I should have differentiated this clearly, as my previous description excluded this distinction. You can see the individual chambers and how the components slide against each other in the cutaway below.
Ironically my bike is going in on Monday to have the preload system checked/potentially replaced as it intermittently refuses to change settings. After riding in solo mode, if I stop the bike (to wait for someone, for example), then restart it and change to 2-up mode, the indicator flashes indefinitely with no change to the preload. This happens probably 1 in 3 times... a bit annoyed, but at least my dealership has been helpful/understanding and have involved HQ engineers in Munich.
Iv'e got to admit, the while I find the GSW Dynamic ESA to work very good overall, the limit of only 3 options for preload is frustrating. Unless you weigh the ideal 175lbs, the icon settings are way off. Fully geared up, I'm about 230lbs. Put the preload in solo(one helmet) and it is very soft (no cases on the bike). Too soft. Handles pretty bad. So, I have to set icons to solo with luggage, which is a bit too much preload, but a lot better than the one helmet icon only. Is this BMW's way of telling me to go in a diet, and what if you're a lightweight and only way 140lbs? If we could tailor the icon settings to match rider weight, or the bike could do it itself. It has travel sensors, it could add preload when it realized that sag is too much. Maybe the aftermarket will help us out someday with custom springs.
That's just it.....it doesn't, but that's where sag measurements come into play. If one truly wants the best performance from their bike's suspension then a "one spring fits all" (variable rate springs help) system won't really allow for such. That's why there are oem and/or aftermarket springs that best suit different rider weights. Of course, some riders may be entirely happy with the oem ride and available preload adjustments, others may not know any better, and some manufacturers may not even allow for different springs, so all of this may be for naught.
I did the same but used Ohlins on an old GS of mine.......the best riding GS, ever.
Wait, you just gave me an idea....
It seems like it would not be an impossibility for BMW to allow input of the riders "ready to ride weight" and then utilize the idiot icons ... if not directly by the rider (more convenient) at least by the dealer / computer connection.
Wilbers makes replacement springs for the HP4 Dynamic suspension, so maybe they will make springs for the GS. Hell, the front shock on the GSW doesn't even have any preload adjustment at all. Seems pretty weird to me.
I am hearing some rumors of Wilbers making complete Dynamic replacement shocks for the GS(haven't found them on the interweb yet), and Touratech just debuted Dynamic shocks at the ECIMA 2013 show for the GSW. These may be options down the road, as it stands now, I spent way to much $ to also add in $3k-$4k in aftermarket shocks. Besides the stock stuff works very good. I'd just like to be able to ge a proper sag setting for me, and me with luggage. Oh well, my Dr. told me to go on a diet anyway.
Not a bad idea, dealer sets rider weight on computer at time of purchase. Then preload icons work correctly.
Punching in your rider weight would be cool. But, alas, it still requires the correct spring to get proper static preload.
No way around that.
I suspect the buyers that weigh between 165-190lbs geared up will find themselves right in the bullseye for the OEM springs. Thus. The ESA settings will work well for them across the solo-luggage-2-up scenario.
Anybody lighter or heavier will not match up well with the pre-programmed settings of the ESA system. Just physics.
I'm betting that if not now, sooner or later somebody is going to make aftermarket springs for the ESA shocks?
And is it really true there is no preload adjustment on the front? That seems implausible.
Yep, the standard GSW(without ESA), or the Dynamic ESA optioned GSW, front shocks have no preload adjustment.
That's hard to get my head around.
It would seem you could get the front and rear out of "balance". Where they would\could work against each other.
Do the after market shocks up front supply pre-load?
Looks like the Touratech shocks do. You can see a gold preload adjust collar. This pic seems to show a non ESA fitting on a GSW. I don't see any wire plugins for the shock. However, they do mention they have an ESA plugin shock too, but I can't find a pic of that yet.
I have a 2013 GS LC with heated grips. I'd like to install Progrip 714 handgrips, as I have on other bikes. The "old" GS grip heaters were "integral" with the grip, i.e. can't remove the old grips without destroying the heating elements.
Does anyone know if the LC has the same deal?
I suppose I could destroy the heaters during removal, then replace with Dual Star (or some such)...might even improve the level of heat (which is a tad low).
Anyway, thanks for any help.
My guess is that a great percentage of the weight is rear-end suspended, more so when the bike is laden with luggage and/or passenger, hence the omission on preload on most GS bikes. I think we can all agree that while that's not optimal, BMW and many (most?) of its owners don't seem to really care. A true sporting bike it is not. Want front preload? Then equip it with an aftermarket kit or buy a bike such as a Ducati Multistrada.