low rev shunting 1150 gs

[ianmc64]

Ok Guys any tips on smoothing out that 30- 40mph low end shunting, a nuisance in towns. r1150 gs running on standard exhaust system with no mods.. i take it a rare thing.. sits poorly at low speeds.. oh, not sure if shunting is right description but you guys will know what i mean..

Cheers..

 

[beemer pimp]

Surging?

 

[beemer pimp]

Around 3k rpm 3 gear ?

 

[beemer pimp]

In that case good tuneup should make better , is it twin or single spark ?

 

[ianmc64]

thats it, spot on. i take it can be normal. just looking for tips.

 

[Dusty]

Mine was doing that... took it for a tune idle screws out and cleaned ..TB's balance and the throttle linkage fettled....

completely different bike for me... smooth through the gears and i cqn actually cruise in 6 or E below 50mph....

defo worth a punt

 

[ianmc64]

its a single spark. new plugs and leads last serviced around 400 miles ago by BMW..TBs quoted as balanced..

 

[ianmc64]

Have read on few posts about idle screws and idle setting. tried fettling with this around 3k felt a little better but did not remove them.

 

[beemer pimp]

Well single spark bit more prone to surging , that y bmw ad second plug , tune will make better but won't cure completely .
It be notes only on constant throttle.

 

[beemer pimp]

So that what you need: check valves, TPS set, TB balance at idle and 3k rpm

 

[ianmc64]

thanks guys i can live with it, but a tune up on the cards asap..

 

[ian6760]

If it's surging more after a service I would say it might need the valves setting again or the TB's have been set wrong.

I've got a single spark and used to have problems with surging, but after doing the valves a few times I seem to now have the hang of it and the surging is gone. I start off with the end float setting then do all 4 valves at the same time for each side, I don't know why this works but it just does.

One other thing, do the valves when it's stone cold.

HTH.

Ian

 

[ianmc64]

Thanks again guys tips greatly appreciated and plenty fettling ahead, excellent....