Nelly71
Registered user
Just got a 1200 gsa and its hunting on start up and tickover
Any help please ?
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Any help please ?
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Lumpy tick over ,
- Thread starter Nelly71
- Start date
kevingambrell
Registered user
I set the tappets replaced the spark plugs and balanced the throttle bodies. Now running as smooth as the day I bought it.
Nelly71
Registered user
Right ok sounds about right , I've only just bought it and it was a pig at first but had a 120mile run home it was fine but once I come off motorway it was still lumpy at tick over , I'll get it looked at , it's had new plugs and oil & filter
Cheers neil
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In the words of a salesman;
Well Sir, they all do that.
Or ditto above.
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Well Sir, they all do that.
Or ditto above.
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Nelly71
Registered user
lumpy
get the throttle sync done and valve clearance-mine was horrible -thought it was the nature of the beast but they can be ok- been 4k since done and now a bit of character coming back so they need a bit of tlc regular
get the throttle sync done and valve clearance-mine was horrible -thought it was the nature of the beast but they can be ok- been 4k since done and now a bit of character coming back so they need a bit of tlc regular
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Secondary coils
newman7096
Registered user
Mines booked in for similar, lumpy below 3000rpm and when hot. Suspect the coils.
Nelly71
Registered user
Right reading on here , could it be bad fuel ? I only just bought bike and it had old fuel so put normal unleaded in ?
flatdog
Registered user
I don't see any mention of bad fuel?
Coils have been mentioned twice in the preceding posts. Make of that what you will
Nelly71
Registered user
Sorry , I've been reading old posts on lumpy running , and a few have said about low octane fuel
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Bendy toy
Registered user
What coils do you have?
Original black painted type fail eventually. When one goes the other wont be long after. If they smell of burnt insulation they are probably getting toasted if not yet crispy.
The stainless wrapped coils are more reliable and ****ing expensive. If you could find a three wire car engine stick coil that fits you would please a great many people.
Lumpy tickover could be and idle speed stepper motor. Not easy to test other than borrowing a know good pair.
You "can" set the throttle balance by unplugging the steppers before starting the engine. It will need a bit of throttle or it wont fire up and wont run below 1500 rpm. I set mine with e TwinMax balancer using that method.
Secondary coils don't seem to do very much. I can unplug mine and the engine runs just the same. It always has. The plugs look correct colour so it seems they are sparking.
Original black painted type fail eventually. When one goes the other wont be long after. If they smell of burnt insulation they are probably getting toasted if not yet crispy.
The stainless wrapped coils are more reliable and ****ing expensive. If you could find a three wire car engine stick coil that fits you would please a great many people.
Lumpy tickover could be and idle speed stepper motor. Not easy to test other than borrowing a know good pair.
You "can" set the throttle balance by unplugging the steppers before starting the engine. It will need a bit of throttle or it wont fire up and wont run below 1500 rpm. I set mine with e TwinMax balancer using that method.
Secondary coils don't seem to do very much. I can unplug mine and the engine runs just the same. It always has. The plugs look correct colour so it seems they are sparking.
Nelly71
Registered user
What coils do you have?
Original black painted type fail eventually. When one goes the other wont be long after. If they smell of burnt insulation they are probably getting toasted if not yet crispy.
The stainless wrapped coils are more reliable and ****ing expensive. If you could find a three wire car engine stick coil that fits you would please a great many people.
Lumpy tickover could be and idle speed stepper motor. Not easy to test other than borrowing a know good pair.
You "can" set the throttle balance by unplugging the steppers before starting the engine. It will need a bit of throttle or it wont fire up and wont run below 1500 rpm. I set mine with e TwinMax balancer using that method.
Secondary coils don't seem to do very much. I can unplug mine and the engine runs just the same. It always has. The plugs look correct colour so it seems they are sparking.
Hi
It has a black stick one side and a silver stick the other , it's just had new plugs , that old owner had fitted last week with oil and filter , took out main plugs look fine , didn't have right socket to get lower plugs out but sticks are black , it had old fuel in bike it's been off road for few months , and it was real lumpy hard to keep tick over , but to get from Wales to London I filled up with normal unleaded , it seemed ok on motorway but lumpy again once off , and same again yesterday on start up , but not as bad as on old fuel , do I need super plus ?
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newman7096
Registered user
Definitely sounds coil related to me. Mines fine on the motorway but as soon as it's warm and I come off the motorway and the revs drop below 3000rpm it starts to misbehave. My RT has done 41000 miles and needs the coils replacing. My old 1150 GSA had both coils replaced st 43000 miles. My money is on the primary coils.
Don't know what year you have or if it the same setup on all years....
Check the rubber cover on the throttle syncing connections are in place-they would mess up idle mix more noticeably than motorway running.
Check the rubber cover on the throttle syncing connections are in place-they would mess up idle mix more noticeably than motorway running.
Bendy toy
Registered user
Start the engine and check which side has the cold (less hot) exhaust header pipe. Swap the coils left-right. If the cold pipe swaps sides you know the culprit.
If the black coil smells burnt - chuck it away. If it's not failing now it soon will be.
If the black coil smells burnt - chuck it away. If it's not failing now it soon will be.
Nelly71
Registered user
Did that , could not feel a difference, but tbh for a few seconds on cold start up it ran sweet then started chugging
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Nelly71
Registered user
All sorted 
My fault, but done now
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My fault, but done now
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What was it and how did you cure it?
All sorted
My fault, but done now
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I've a problem with my bike...... I know what i'll do, i'll ask in the UKGSer forum, they'll try and help me.
Ahh, good news, I've now solved the problem, admittedly of my own making.
Thank you all for trying to help because but i won't be saying what the fault was and anyone else with a similar problem in the future can get fecked.
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