Stutter on acceleration
#1
Stutter on acceleration
Ok, well I took my bike to work the other day and on the way home when I wrenched it she stuttered then caught, I figured it was just cold and kept going. Well anytime I hit the throttle she stuters, I dont think its the carbs as I run her regurally through out the winter. And it rolls out just fine, she stutters randomly at different throttle positions and as a side note she idles just fine, and has had the coil over conversion. It felt like it wassnt getting electricity, I have felt gummed up carbs and I am pretty sure it wassnt that. I am thinking its the dreded R/R is going so I will report back in about 20 min with a reading at idle and a reading at 5000 rpm.
Mike
idle cold fluctuates rapidly between 12.02 - 12.15
idle warm fluctuates rapidly between 12.15 - 12.22
5000-5500 rpm cold 15.30 steady
5000-5500 rpm warm 15.36 steady
Mike
idle cold fluctuates rapidly between 12.02 - 12.15
idle warm fluctuates rapidly between 12.15 - 12.22
5000-5500 rpm cold 15.30 steady
5000-5500 rpm warm 15.36 steady
Last edited by outlawfox13; 03-11-2013 at 03:47 PM.
#2
#3
I did check headers with water all sizzled. Maybe a bad battery?? or could be carbs I can pull em easily.
As a better description, when it stutters it chuggs along for a bit like 3 seconds then the bike catches like normal and is off like a rocket. its really wierd, only thing I have done recently is an oil change with rotella 10w-40. But she rode fine for two days before this started. I even put seafoam in for extra measure.
Ok, I opened up the carbs and they are all clean. so now I dont know.
Maybe i could clean my K&N filter, that could maybe help.
will report back later...
Well, it was dirty but now i have a dead cylinder, and its smoking. So now i am gonna get some rest, then tomorrow try n figure out more. Any tips ideas or suggestions are greatly appriciated.
Mike
As a better description, when it stutters it chuggs along for a bit like 3 seconds then the bike catches like normal and is off like a rocket. its really wierd, only thing I have done recently is an oil change with rotella 10w-40. But she rode fine for two days before this started. I even put seafoam in for extra measure.
Ok, I opened up the carbs and they are all clean. so now I dont know.
Maybe i could clean my K&N filter, that could maybe help.
will report back later...
Well, it was dirty but now i have a dead cylinder, and its smoking. So now i am gonna get some rest, then tomorrow try n figure out more. Any tips ideas or suggestions are greatly appriciated.
Mike
Last edited by outlawfox13; 03-11-2013 at 09:12 PM. Reason: More testing
#4
#6
#7
Ok, well it was low on fuel. So i ran a can of seafoam in it, that didnt work so i filled it up and still nothing. That was before i took the carbs off. Ill get new plugs as i am sure with coils it could use new ones. I will try and do a spark test if the weather dries up. Then ill go from there.
#8
Ok, she has spark, jumps a 1/4 gap. Not a bright blue snap, but it does snap. I got new plugs, nothing, put old coils back on, and nothing. No oily residue on plugs, smelled like fuel. And why n the hell is she smoking??? I hope its not a head gasket. Oil looks fine not milky, but could it be leaking into the cyl only? Man im getting worried now. Ill pull carbs again tomorrow to ensure the floats are seating correctly. Oh as a side note i think my batt is dying, the headlights will stay off after starting untill i rev it for a bit or hit the starter to charge it a bit more. Will a faulty batt cause these symptoms?
Mike
Mike
#9
A bad battery can cause all sorts of problems Mike.
See How to diagnose electrical problems, charging system on your motorcycle
Did you charge the battery before starting the bike? The CBR1000F loooooooooves a fully battery.
Cheers, SB
See How to diagnose electrical problems, charging system on your motorcycle
Did you charge the battery before starting the bike? The CBR1000F loooooooooves a fully battery.
Cheers, SB
#10
Well I hate to say it but I am pretty sure it is either bad rings or bad head gasket. she is spewing out lots of smoke, and chugging badly. I guess Ill start looking for a parts bike or a good motor and do a swap, or part her out. also oil is comming out of the exhaust weep hole. oh the cold cyl was cause I forgot to screw in a jet. Let me know what you think. Oh I tried to do a compression test, but my tester doesnt fit the spark plug thread.
mike
mike