Stuttering Buss

experts will chime in soon... let me help u out here... list the year/mods done.... services performed and engine mileage and are u the original owner?
 
ali123 said:
experts will chime in soon... let me help u out here... list the year/mods done.... services performed and engine mileage and are u the original owner?
Click to expand...

Hi
Thanks for you prompt reply,
04 K4 16000 miles
I am the 4 th owner..
completely standard,original exhaust,
I know the previous 2 owners,
Goes great, apart from this problem!
Thanks again
 
I think you really need to explain the problem in detail to help with a half decent diagnosis of the problem, 'it stutters' just doesn't really cut it.
Also, welcome to the oRg.... :welcome:
 
Kiwi Rider said:
I think you really need to explain the problem in detail to help with a half decent diagnosis of the problem, 'it stutters' just doesn't really cut it.
Also, welcome to the oRg.... :welcome:
Click to expand...
I’m with kiwi. More info needed for the .org experts to help you out.
 
Again thanks for the replies!
When moving off , it feels like it’s on 3 cylinders...
But once it reaches 2 thousand revs it’s perfect
And all through the rev range it’s fabulous!
Changed plugs , air filter, still nothing...
Thanks again
 
When the engine is idling in neutral and UNLOADED, is it running smoothly on all 4 cyls?
Is it misfiring (stuttering as you put it) only when under load moving off from a standstill in 1st gear?
Are you slipping the clutch when taking off or just releasing the clutch at 1000 to 1200 rpm?
Is it possibly just chain snatching because you are releasing the clutch at too low rpms?
I ask this because it is easy to mistake engine misfire for chain snatch due to too low in the rev range on take off.
Try raising the rpms to 2000 before slipping the clutch in 1st gear. Is it still 'stuttering'?
If it is still doing the same....
Maybe have the coils tested, could possibly be one of the coils breaking down at that low rpm under load.
 
Hi Kiwi rider,
Riding bikes since 1980,
So with the greatest respect, I would know if it’s s chain problem.
I am probably slipping the clutch to compensate for the stutter...
It’s definitely a fueling or electric problem..
Thanks again
 
With respect to treating the engine properly when cold, is the behavior identical cold versus heat soaked?

On the electrical supply side I would do the service manual voltage measurements, both cold and hot.

If it is on 3-cylinders when starting out I wonder if an infrared thermometer on the header pipes could identify a cold cylinder.

Did you switch gas stations this last time? Just eliminating the possibility of a tankful of water from those bad people.
 
Hayabusa Wannabe said:
With respect to treating the engine properly when cold, is the behavior identical cold versus heat soaked?

On the electrical supply side I would do the service manual voltage measurements, both cold and hot.

If it is on 3-cylinders when starting out I wonder if an infrared thermometer on the header pipes could identify a cold cylinder.

Did you switch gas stations this last time? Just eliminating the possibility of a tankful of water from those bad people.
Click to expand...


Hi
Thanks for reply,
Petrol is fine, I don’t use the same petrol station, and bike is running like a dream when over 2 thousands revs...
Iysjust moving from stationary, it gets the hiccups!!!
Thanks again
 
One easy thing to check is the throttle position sensor by putting it in dealer mode and seeing if it is in spec.

When the clutch is engaged the bike is in a different map I believe and the timing is advanced.

Check the ohm of each coil with a multi meter. See if any is giving a higher resistance. You can even test the spark going to each cylinder while letting the clutch out with an ignition spark tester. https://www.amazon.com/Lisle-20610-...coding=UTF8&psc=1&refRID=SZYZ7TQDZ2RYDZXQPVJN
Unbolt the gas tank and hang the tester somewhere visible. Hook it up between each coil and spark plug and see if any coil gives a weak reading. That would at least eliminate the coils.
 
jermzfree said:
When the clutch is engaged the bike is in a different map I believe and the timing is advanced.
Click to expand...

Meant to add: Maybe try bypassing the clutch switch and connect the two wire leads with an ordinary style fuse or piece of wire. This will leave the bike in the neutral map. See if anything changes. Just keep it in first gear.
Ha! quoted myself.
 
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