Snatchy Throttle Cure?

[MisterB]

My 07 GS is great except for a snatchy throttle, particularly noticeable when riding through towns or filtering. I've tried an accelerator module but that did nothing. Has anyone else found a way round this issue please? Fitting a Power Commander maybe? It's ruining the bike for me at the moment :-(

 

[RedRick Esq.]

Hilltop !

 

[GORILA]

I used a Dobeck Techlusion on my 1100 and it totaly cured the surging you described. As I understand, what it does is add more fuel which solves the lean running problems. It realy works, is relatively inexpensive and the company are very good to deal with any problems.
Might be worth considering,

regards.

 

[dern]

Is it due a service? Mine was loads better after doing the valve clearances and the throttle body sync.

 

[MisterB]

I used a Dobeck Techlusion on my 1100 and it totaly cured the surging you described...

Thanks Gorila. Sounds good but after checking their website it doesn't look as though they make one for the 1200GS :-(

 

[MisterB]

Is it due a service?...

No, it was recently serviced by BMW.

Do they all suffer? Do you guys just accept it and use more clutch or is there a way round it? I can't believe it's something that can't be fixed...

 

[Bendy toy]

Get a generic map from Hilltop or elsewhere that understands the finer points of these bikes. It will give 80% of what a rolling road tuneup offers.
The issue is air fuel ratios are too weak as standard. It massages fuel consumption figures and keeps noise down so keeps EU regulators happy.
Also use 97 or 99 octane petrol and fit a decat header.
If the bike has been run in too carefully the pistons will be tight aggravating low speed stalling.
They need to be properly used. Pootling about at slow traffic speeds while running in is the worst for these bikes.


Sent from a widget that can't spell.

 

[dern]

When they serviced it did they do the valves and throttle body sync or was it just an oil change?

I didn't like mine initially and bought an accelerator module which did help but I'm not convinced that the engine mapping hasn't adjusted itself back (talked about on another thread). I then did the valves and the throttle body syncs and it's as good as it's ever been.

It's not as smooth as other bikes I've had and I suspect that the fact that it's a big capacity twin that naturally runs quite lean and also the fact that it only runs one throttle cable (new one on me) all contributes. I find that if I'm tired and/or tense it's quite bad but if I'm relaxed I can filter and control it without any snatchiness.

I've always found the over sensitivity to be something that seems to have come along with FI systems on larger capacity bikes. My early fireblade (2001) was a complete pain in the arse until I got used to it.

I'm probably not going to have the hilltop remap on mine but if I decide to keep on with a gs next year too (this is my first year on one after an R1) I'll buy a newer one and get a remap on that. I'm not completely convinced by the bike yet though. I love everything about it except the throttle response.

Mark

 

[Deleted account 211025001]

I don't know what your experiance with WBM's boxer twins is so excuse me if I'm teaching you to suck eggs....................

Forget fuel controllers for now and start with the basics. The 1200s do not particualry have an issue with poor fuelling and certainly, as a rule, have no issues with surging. Remaps will optomise the fueling for sure but we're talking further improvements to the engine not ironing out fuelling 'issues'.

So, first thing is you will not get the bike to trickle through traffic, nor have fine throttle control at low speeds without feathering the clutch. You have two big feck off pistons in thet engine AND shaft drive which makes the engine feel very 'connected' at low revs.

Next is to check the engine set up and even things as obvious as throttle cable routing, condition etc. I know you've had the bike serviced recently but that's no guarantee it's been done well. Having the throttle bodies balanced, valve clearances and end float spot on make for a very smooth engine (for a big twin).

If, after all that, you still have issues then yes look at the fuelling by all means but that's the last thing I'd be looking at.

Andres

 

[MisterB]

Thanks all

I did buy my Accelerator module from Belgium though I got the compact version.

I've made an enquiry with the dealership that did the service as to whether the valve clearances and throttle bodies were done so I await their reply...

If all that fails I guess it's fuelling. Hilltop seems to be a popular choice though Power Commanders are used widely on other bikes - anyone used one on a GS?

I've just done 1600 miles in five days and the bike was great on the motorways, awesome in the twisties but a real pain in the a@£$ in towns and traffic!

 

[Victor c]

Quick easy fix could be as simple as disconnecting the battery for five mins. This allows ecm values to be reset. When re connected turn on ignition and once display has finished cycling twist throttle twist grip through three full movements slowly. This resets the throttle. Worked on mine which every time I blipped the throttle would nearly stall and hesitate on pickup.

Mark

 

[MisterB]

Quick easy fix could be as simple as disconnecting the battery for five mins...

That is definitely worth a go - thanks! I'll try it tomorrow

 

[Pukmeister]

Might also be worth fitting a new set of spark plugs.

 

[Bendy toy]

Cracked record warning - I always mention this but as the bikes age its getting more common.

My 08 was doing all sorts of stalling, snatching and hunting but it was never consistent. Eventually one side went rough and sooted up the Lambda sensor. The cause was failing main coils. Both went down at pretty much the same time.

Ive always expected a failing coil to affect high revs more than low revs. These were the other way around.