Gen 4 Suspension

[alex]

Last time I looked it was about £400 for the 2D sensor and the additional loom.

Not sure there is a mounting kit for one yet. Baz made a nice little bracket to mount it off the front mudguard.

 

[RammyRR]

Not sure there is a mounting kit for one yet. Baz made a nice little bracket to mount it off the front mudguard.

Seem to recall someone saying the Gen 3 kit fits the 4, not sure which thread it was in.

 

[alex]

The rod will connect to the bike but the mounts are wrong.
The top of the fork is narrower than Gen3, so that just needs a sleeve to help it grip.
The bottom one requires a custom solution, and HAS to be front mounted to avoid being hit (by the bike).

 

[baz]

The rod will connect to the bike but the mounts are wrong.
The top of the fork is narrower than Gen3, so that just needs a sleeve to help it grip.
The bottom one requires a custom solution, and HAS to be front mounted to avoid being hit (by the bike).

The gen4 fork is fractionally larger than gen3 so,a slightly longer screw is ideally required for the top clamp.
The sensor needs to be fitted in front of the fork leg and a bracket fabricated to fit the mudguard screws.
I will post photos when my bike comes back from Jerez.

 

[Richinio]

Question about DDC in Pro Modes....

For Engine, ABS, DTC etc - when setting these in a Pro mode, it tells you what the Rain, Road, Dynamic and Race preset values are for reference. However, the screen doesn't give the presets values for front and rear damping. Does anybody know what the DDC settings actually are for the default modes? The manual just says Comfortable, Sporty and Race Track - not very specific....

 

[alex]

The gen4 fork is fractionally larger than gen3 so,a slightly longer screw is ideally required for the top clamp.
The sensor needs to be fitted in front of the fork leg and a bracket fabricated to fit the mudguard screws.
I will post photos when my bike comes back from Jerez.

Ahh I thought you said it was smaller. Sorry. You probably said the Gen3 was smaller and I didn't listen lol

- Alex

 

[RammyRR]

Had a good chat with Richard from Maxton Suspension this afternoon about a re-spring for the M. Surprisingly Maxton haven’t worked on any Gen 4 as of yet, he tells me from experience with the Gen 3’s DDC that it’s difficult for them to dyno test the suspension to get a baseline. The DDC also causes the fork springs to have to be quite minimal to be accommodated, which may rule out use of their stock springs.

To re-spring he’d want the bike for 3 - 4 days to have a look at the fork internals, and if this proved their stock parts would fit then it’d be a relatively simple job costing around £200 - inclusive of both front and rear.

Obviously us owners have the warranty to consider.

 

[ampj8]

Question about DDC in Pro Modes....

For Engine, ABS, DTC etc - when setting these in a Pro mode, it tells you what the Rain, Road, Dynamic and Race preset values are for reference. However, the screen doesn't give the presets values for front and rear damping. Does anybody know what the DDC settings actually are for the default modes? The manual just says Comfortable, Sporty and Race Track - not very specific....

It’s not mentioned anywhere.
However do 3 modes the same except DDC and you can test them. That’s the beauty of the system.

I made all 1’s to me feels like a road need to further test.



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[oldwobbler]

Admin - as a forum representing a good number of gen 4 owners is there any way to submit an official request to BMW asking for the ability to change damping settings in the 3 road modes?

 

[alex]

Hehe I think you overstate our pull
But I was thinking how the motor trade in general doesn't really listen to software based feature requests yet...I work for a cloud/software company and we are inundated with them and do our best to implement them in a decent timeframe.

- Alex

 

[ampj8]

So went for first service and dealer had an Ohlins steering damper. Exchanged some opinions on how the bike feels with OEM on track having both ridden his demo. Then basically I decided to take it he gave me good discount which helped.

I had one in my last bike and it worked well compared to the OEM which is ok but not great imo.




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[TheGodfather]

I aint got a clue when it comes to suspension. Found this the other week and You can re shim the forks easily yourself.
What and how much would this effect them. He shows you at 1.45

 

[ampj8]

Would like to see a more complete explanation about how these shims influence and what they influence.
What Sepp says there is merely the intro.


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[baz]

In my opinion,when using racepro mode,being electronic via the ecu,when selecting(for example) rain mode,the +/- settings for ddc will be based on those pre-determined settings for that mode.
With the base setting being zero,presumably you could soften the settings even further!
I have not tried this as it is of no interest to me!
My assumption is based on my own simplistic theory that the ecu selects it's base settings from the selected mode re.aperture size for damping(i.e rain=wide aperture/race=narrow aperture).
I am assuming that the base damping is controlled by it's own electronic valve and comp/rebound have their own.
I will find out more next week when my forks and shock pay a visit to Darren at MCT.
Hopefully,I can also find out about shim stacks!

 

[ampj8]

I've had my S1000RR Sport for 2 weeks, only done 300 miles (bad weather + had a flippin puncture!)

So far, I've found the ride to be quite harsh.

I'm quite light (71kg without gear, 76kg suited and booted). I notice, from the manual, that the springs with no preload are suited to an 85 kg rider (not sure if this is with gear or not?)

My questions are....

1. Are other lighter riders experiencing a harsh ride?
2. Does the suspension become less stiff after doing a good chunk of miles?
3. Does anbody know what the spring rates are in the front forks and rear shock?
4. Has anybody changed their springs on the new model yet?

In the intro the project lead of the RR said that the Shim package can be used to adjust to rider weight and riding.
I need to investigate more to understand what do 2 smallish Shims can change in the bike...


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[Richinio]

In the intro the project lead of the RR said that the Shim package can be used to adjust to rider weight and riding.
I need to investigate more to understand what do 2 smallish Shims can change in the bike...


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That's interesting, I don't know how that would work. Would be interesting to find out more....

 

[fast_ryan]

The different shim package was mentioned during the model launch but unsurprisingly scant detail, like most things regarding the Gen 4, has been released to date. Changing shims within the suspension unit typically allows you to alter the flow of oil. Depending on the thickness of the shims used you can effectively alter the damping and change the behaviour of the suspension. This may prove to be useful but until BMW releases any information, and a reputable suspension specialist has stripped a DDC fork and shock, it is hard to understand what the benefits of fitting such a package would be. This is particularly so as you normally change the springs first before even contemplating making changes to the shim stacks etc. Finally, I would be very surprised if any of the UK’s BMW dealerships have any information regarding the package, or the technical knowledge required, to advise customers on the affects of making internal changes like these to the DDC system.

 

[oldwobbler]

This all sounds really complcated, overly expensive and time consuming when all i want to do is reduced the compression damping a few clicks for the road.

 

[RammyRR]

This all sounds really complcated, overly expensive and time consuming when all i want to do is reduced the compression damping a few clicks for the road.

Yes absolutely - trouble is we’ve got BMW as Fagin and us owners in the Oliver role asking for more gruel.

 

[Richinio]

This all sounds really complcated, overly expensive and time consuming when all i want to do is reduced the compression damping a few clicks for the road.

I'm considering changing to conventional fork internals and rear shock. Seems a shame to dump the electronic gadgets I've paid for.
Also, concerned that getting rid of the DDC would adversely affect resale value.