Yeap that sounds like my 14 plate GS, also the transmission feels like a chain drive bike with a very loose chain feels on the over run!, last year when my GS was in for a service I was given a new RS and was amazed how smooth it was both the engine and transmission in comparison?
Low speed surging
- Thread starter MisterB
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Yeap that sounds like my 14 plate GS, also the transmission feels like a chain drive bike with a very loose chain feels on the over run!, last year when my GS was in for a service I was given a new RS and was amazed how smooth it was both the engine and transmission in comparison?
First gear in Dynamic mode can be a bit harsh in town, but definitely shouldn't surge in 3rd at 30mph
OK understand now, never felt that on my 2015 GS TE LC or on my previous 2013 GS LC in Rain, Road or Dynamic mode - sounds like something is not set up quite right.
Deleted account 211025001
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A tendency for the engine to hunt, especially at lower revs, on any bike that has not been remapped by Hilltop.
All FI bikes I have owned (twins and singles) hunt/surge.
My 1190R does (almost imperceptibly but it's there if you look for it) and my Husky is quite bad at low speeds.
My old R1200GS did it (until it was remapped) and all three WC's that I have so far ridden do it.
Perfect set up (TPS, throttle ballance) will minimise it but only a change in fuelling such as a remap will eliminate it.
Andres
Andres
Well if your bike is doing 1500rpm at 30mph in third gear then you don't have a normal gearbox or your rev counter or speedo are broken.I wasn't. I may just be plain wrong. I'll check next time I'm out
Sounds like a trip to Hilltop's is in order then?
Did a test this morning on my 20 mile summer commute from the girlfriend's place to my work.
I found several opportunities to test each riding mode, Rain, Road and Dynamic at a constant 30mph in 3rd gear - there was no hunting, surging or other weird effects.
My bike is a 1200 mile 2015 GS LC TE. I have had 4 1200 GSes since 2005 and none of them have exhibited the 'surging' effect described. Perhaps I have been lucky and always got a 'good one' and the people with 'surging' have 'Friday afternoon' bikes, not run them in correctly or some other weirdness??????
PS at 30mph in 3rd gear the revs are approx 2850rpm
I found several opportunities to test each riding mode, Rain, Road and Dynamic at a constant 30mph in 3rd gear - there was no hunting, surging or other weird effects.
My bike is a 1200 mile 2015 GS LC TE. I have had 4 1200 GSes since 2005 and none of them have exhibited the 'surging' effect described. Perhaps I have been lucky and always got a 'good one' and the people with 'surging' have 'Friday afternoon' bikes, not run them in correctly or some other weirdness??????
PS at 30mph in 3rd gear the revs are approx 2850rpm
With both my TC and LC in town traffic I often found that the bike laboured in third but was to eager and jerky in second ( if that makes sense)
Hill top cured both so that either gear was perfect
Hill top cured both so that either gear was perfect
Well that is weird because the LC is producing about 2/3 of maximum torque by 3000 rpm so if your bike was labouring in 3rd at 30mph then it was badly broken.
Just remind me where i mentioned 30 mph in my post
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It's called mechanical sympathy.
As pretty much all lean running FI twins and singles surge/hunt on a low constant throttle and given Engineer is unable to feel that you'd hardly expect him to have any sort of mechanical sympathy as he trundles off down the road, little plastic bags flapping from his switch gear
Andres
Ah, but surely the revs change depending on the engine mode selected?
No - the mode cannot change the engine revs for a given road speed - the bike has 6 fixed ratio gears so it is not physically possible. I can see that you are not mechanically minded
If your bike was labouring in 3rd what revs what speed were you travelling at in order for this to happen?
Dont answer a question with a question
Say sorry for your misunderstanding and move on
My post is to point out that 3rd gear was too high and 2nd too low for town work this was a fueling issue that was solved with a re map
that is it
It's called mechanical sympathy.
As pretty much all lean running FI twins and singles surge/hunt on a low constant throttle and given Engineer is unable to feel that you'd hardly expect him to have any sort of mechanical sympathy as he trundles off down the road, little plastic bags flapping from his switch gear
Andres
The bike holds a constant 30mph in 3rd at constant revs so where is the surging, hunting? The OP found it difficult to hold a constant speed - if you also find this difficult I suggest that it is operator error not the bike?
For what speed?
You do realise that as you slow down it is wise to change down and vice versa when you speed up????
Another question
The speed that was appropriate at the time !
I t is irrelevent as the issue is the fueling and mechanical sympathy not the speed and if you can maintain a steady 30 mph in a town centre then you are better than the perfect bikes you have
Simples - ride at 30mph in third and engage cruise control. If the bike stops accelerating / decelerating then it's your hand and you need to consider if you have early onset Parkinsons.
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