Hi ST guru's l hope that l can pick your brains to help solve a puzzling issue that has started on my '05 50k st1300. Please bear with the lengthy blurb. There are a couple of possible issues that may be related. These are not constant but every now and then.
Started possibly with a fast cold tickover, l thought cured via various forum advice re the cold wax unit, possible air in the system. Flushed the system and tickover normal.
Next issue started a month or so later when noticed that it sometimes takes a second or two extra to start the bike. Bike does not feel quite right, very slight difference in the running, cannot say exactly why but feel something not quite right. Changed plugs and air filter, no difference.
Sometimes when turning the bike over from cold l prematurely take my finger off the start button before it fires up. Swear and start again. Only when this happens it will not tick over with me having to keep the revs right up even when it gets up to 3 bars on the temperature gauge, will take anything up to 10-15 miles before it will tick over without cutting out. Runs not too bad when mobile as l have straight main roads, but come roundabouts, changing down without holding 3k revs will instantly cut out and sometimes surges but not very often as l've sussed out the 3k revs.
The odd tickover also happened the other day when cold, l turned on the ignition to check the fuel gauge, turned it off while l sorted a couple of things out , when started the bike only to have it run rough as detailed above.
When warm and running 'normally' sometimes while on the centre stand if l up the tickover revs to 2k and hold it there, have noticed that the revs will sometimes go up and down by anything up to 5oo revs.
When the fuel gauge gets down to 2, sometimes it will run abit rough but not quite as bad as the cold issue. Fill it up, runs fine.
Driving me nuts at the moment. I have looked through the various threads and could be an intermittent fuel pump issue; cold wax unit, another one could be the T bar and pipes or throttle body sync.
I have not changed anything but thought that l would throw my problem out there for help and advice. I try to do most things myself but not overly technical or much good with electrics.
Useful help and guidance appreciated.
Started possibly with a fast cold tickover, l thought cured via various forum advice re the cold wax unit, possible air in the system. Flushed the system and tickover normal.
Next issue started a month or so later when noticed that it sometimes takes a second or two extra to start the bike. Bike does not feel quite right, very slight difference in the running, cannot say exactly why but feel something not quite right. Changed plugs and air filter, no difference.
Sometimes when turning the bike over from cold l prematurely take my finger off the start button before it fires up. Swear and start again. Only when this happens it will not tick over with me having to keep the revs right up even when it gets up to 3 bars on the temperature gauge, will take anything up to 10-15 miles before it will tick over without cutting out. Runs not too bad when mobile as l have straight main roads, but come roundabouts, changing down without holding 3k revs will instantly cut out and sometimes surges but not very often as l've sussed out the 3k revs.
The odd tickover also happened the other day when cold, l turned on the ignition to check the fuel gauge, turned it off while l sorted a couple of things out , when started the bike only to have it run rough as detailed above.
When warm and running 'normally' sometimes while on the centre stand if l up the tickover revs to 2k and hold it there, have noticed that the revs will sometimes go up and down by anything up to 5oo revs.
When the fuel gauge gets down to 2, sometimes it will run abit rough but not quite as bad as the cold issue. Fill it up, runs fine.
Driving me nuts at the moment. I have looked through the various threads and could be an intermittent fuel pump issue; cold wax unit, another one could be the T bar and pipes or throttle body sync.
I have not changed anything but thought that l would throw my problem out there for help and advice. I try to do most things myself but not overly technical or much good with electrics.
Useful help and guidance appreciated.