1 lumpy running...could be electrical... Fri Jul 26, 2013 10:42 am
Markzz
Silver member
I've done the hair drier test on the Hall sensor & engine seems to run fine when the sensor is warmed up....
any other ideas
from... https://www.k100-forum.com/t5739-wanted-130-90-17-back-tyre-and-k100-offside-pannier
no longer need HT lead - replaced that but still running v. lumpy under ~2500 RPM...any ideas...will trawl forum for tips...
Regards your lumpy running, I would be looking for air leaks.
Is the oil filler cap tight?
Are all the blanking plugs on the 3 front TB's and the hose on the rear one?
Is the engine breather hose knackered and leaking?
Leaks on the inlet rubbers? Fiddily job to replace but can be checked first.
meant to say the poor running under 2000 revs only happens once the bike has warmed up...
Based on the additional info about happening when warm, I would be thinking of the Hall effect sensors.
They live behind the 'T' shaped cover on the front of the engine, so easy to get at. They trigger the ignition. Not unheard of for them to play up when warm.
If you do a search on the forum you will hear from others who have gone before you.
Basic way of checking them is to take off the cover and heat them with a hair dryer on a cold engine without starting.
Then start up and see if the fault is there.
any other ideas
from... https://www.k100-forum.com/t5739-wanted-130-90-17-back-tyre-and-k100-offside-pannier
no longer need HT lead - replaced that but still running v. lumpy under ~2500 RPM...any ideas...will trawl forum for tips...
Regards your lumpy running, I would be looking for air leaks.
Is the oil filler cap tight?
Are all the blanking plugs on the 3 front TB's and the hose on the rear one?
Is the engine breather hose knackered and leaking?
Leaks on the inlet rubbers? Fiddily job to replace but can be checked first.
meant to say the poor running under 2000 revs only happens once the bike has warmed up...
Based on the additional info about happening when warm, I would be thinking of the Hall effect sensors.
They live behind the 'T' shaped cover on the front of the engine, so easy to get at. They trigger the ignition. Not unheard of for them to play up when warm.
If you do a search on the forum you will hear from others who have gone before you.
Basic way of checking them is to take off the cover and heat them with a hair dryer on a cold engine without starting.
Then start up and see if the fault is there.