Sinking rear suspension under hard acceleration

[Edmund Kean]

oh most definately............or not.....

It was good fun. Pleased the OP has a bit of direction to getting sorted.

 

[StewMcGrew]

How did the 'Rapid' ride go?

Brilliant. The instructor was really good. Brilliant roads too. Was absolutely knackered by the end of the day.

 

[Comfy Old Boots]

What spring did you opt for buddy?
(Would you happen to have any details/specifications/make/model/link please?)

Thank you in advance

I have an aftermarket shock, no electrics in it. I simply got the next spring up. It’s now on minimum preload instead of wound on a bit. Hope this helps.

 

[Decompressing]

Wow, 93kg? Sounds like your mum pinched a tiny bit earlier than the original poster....

Let me contribute to the possible 20 pager and help it get there at the same time.

Loose some weight for a start. Only bodybuilders, fat fucks and aliens weigh that much. Not that I now what composition you are, you might be 6'4'' and quite attractive to either or most sexes in this woke section of UKGSer.* You don't have to explain how much you bench or press, what planet you are from or that you have been on weight watchers since January. By the way I roll (as in spar) with a former wrestler that is about 110 to 120 kgs of muscle and about my height and I'm only 93kg.
I have mentioned before that the dynamic suspension on the new bikes are flawed as to the inconsistent feel and feedback you get from the continually adjusting that goes on underneath you. I don't like it so I don't have it and I'm much better for it thanks. If BMW continues down this road it will have been my last modern GS/GSA I bought. Comments below I you believe I'm talking shit. Not even Lotus (some of the finest handling sports cars) consider putting electronic adjustable suspension on their cars because to them it doesn't offer the best of both worlds and it is flawed at either end of the adjustment. It is not even favoured by racers on their team bikes. Make of that what you will.
Electronic preload is not the be all and end all. Get some springs that actually sets the static sag up for you. It will be much better.
You can also have the valving adjusted at the same time to suit the riding style.
I mean, you probably spent to what amounts to close to 20k bike value in a PCP payment deal you might as well spend a few hundred more to get the bike to suit or just starve a little bit with the added bonus of saving some pie money for your euro jaunt on that awesome steed.

No matter what bike you ride, you are outside of manufacturer spec for the suspension settings. Adjust to suit ie springs and valving or another lower cost option is available. The latter being far healthier for body, mind and wallet.

*Disclaimer. I know you not but if you are a fat obese fuck and if offended by such comments you have only yourself to blame unless you are on medication or have a health condition that makes you balloon in which case I say, 'all the best with your health'.

 

[Comfy Old Boots]

That’s strange, ordinarily under hard acceleration on a non auto shock, I would expect the unit to lengthen thus raising the rear.

Soz

Still does not compute.

I love that the powers that be have swung into action, but the more I think about this this the more I can’t help but think this is complete and utter bullshit / when applied to the original post.

Like, what’s your benchmark?

The salt flats in America?

 

[Edmund Kean]

Soz

Still does not compute.

I love that the powers that be have swung into action, but the more I think about this this the more I can’t help but think this is complete and utter bullshit / when applied to the original post.

Like, what’s your benchmark?

The salt flats in America?

Soz... I had to look that up. That's okay.

I've reflected on this and admit to missing the OP's weight in his opening post. Having considered this, I believe if the shock is way outside appropriate spec (under sprung etc) for the chaps weight, then hard acceleration forces may not be enough to lengthen the unit (raise the rear). The resulting effect of hard acceleration could be the shock is overwhelmed and squat as witnessed by the Rapid representative.

There is empirical evidence of how a properly matched/set up shock should behave under acceleration in the link below. Click on to 21:50 minutes to view an explanation and side of a bike footage.

https://www.youtube.com/watch?v=EIbMN0lZd14

 

[Edmund Kean]

Soz... I had to look that up. That's okay.

I've reflected on this and admit to missing the OP's weight in his opening post. Having considered this, I believe if the shock is way outside appropriate spec (under sprung etc) for the chaps weight, then hard acceleration forces may not be enough to lengthen the unit (raise the rear). The resulting effect of hard acceleration could be the shock is overwhelmed and squat as witnessed by the Rapid representative.

There is empirical evidence of how a properly matched/set up shock should behave under acceleration in the link below. Click on to 21:50 minutes to view an explanation and side of a bike footage.

https://www.youtube.com/watch?v=EIbMN0lZd14

But motorised shocks with auto ride height might behave differently...