Question about 2008 Yamaha XT 660 X

1 Answer

Misfire & spluttering when warm

My yamaha mt o3 is misfiring badly specialy at low revs & gets worse the more you ride it. it seems to be ok till it warms up. its also very jerky riding around town or back streets at low revs. can anyone help me out with some suggestions please.
wayne

Posted by on

  • waynerodgers Nov 21, 2008

    cheers robotek

    very helpfull mate. Its solved the problem



    wayne

  • Anonymous Mar 19, 2014

    Engine misfires at low revs when warm

×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 1,512 Answers

Hi wayne

Not knowing what you have checked or done already, I would first remove the spark plug from the bike and check it fir a carbon deposits. If it has not had a new one for a while, Just get a new one and replace it. Before I drop the oil for a service(as it can dirty up the oil), I also like to run a fuel system cleaner additrive(I use a Nulon product) to my bikes every few thousand kays, just to keep everything tip top. If you still have misfire problems, then it will most likely be a faulty sparkplug cap, ignition lead or other ignition part. Change out/clean spark plug with a wire brush first. I think that will fix it for you. If you still have problems,happy to talk to you more about it.

regards
robotek

Posted on Nov 20, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Gsxr cuts out


replace the fuel pump or adjust the TPS. It doesnt do it in nuetral its because it is not under a load. Put in dealer mode to check the TPS. It should read -COO... If the - is not in the middle (if its up top or on bottom) it needs to be adjusted.

Mar 30, 2014 | 1998 Suzuki GSX-R 600

1 Answer

Engine misfire low revs


Hi, Andy and the usual suspects are:
1. Spark plugs in bad condition or partially fouled.
2. Spark plug cables in bad condition and leaking.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil, module, and or sensor.
5. Battery nearly discharged.
6. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
7. Intake air leak.
8. Water, dirt, or rust in the fuel system, carburetor and/or filter.
9. Fuel tank vent system plugged or carburetor vent line closed off.
10. Carburetor controls misadjusted.
11. Damaged carburetor.
12. Loose, dirty, or corroded ignition module connector at crankcase.
13. Faulty MAP, CKP, O2, and/or CMP sensors.
14. Incorrect valve timing.
15. Weak or broken valve springs.
16. Damaged intake or exhaust valve.
For more information about your issue, please visit the websites below. Good luck and have nice a day.
right cylinder misfire at low revs
How To Fix Cylinder Misfire P0300 P0301 P0302 P0303 P0304 P0305 P0306
R6 motorcycle cylinder misfire power loss fault finding spark check. http://www.lewisportusa.com/manuals.htm
http://www.betamotor.com/en/support/manuals


Mar 01, 2014 | Beta Motorcycles

1 Answer

50cc running rough when warm


dirty air filter acts like a restrictor which is like leaving choke on. as is ok cold could be this or could be ht lead or ht cap breaking down when hot cos of bad connection

Feb 13, 2013 | Motorcycles

1 Answer

Suzuki gsxr 1000 k5 misfire


My gsxr1000 k6 does it only when hot and when I pull of its splutters and when I change into second it happens changed plugs and coil battery etc still there help

Jul 01, 2012 | Suzuki Motorcycles

1 Answer

My yamaha fj1100 misfires when going over 50km


From your description, it would seem as if you may have a problem with the ignition timing sensor. This gives signals to the rev counter and would cause the misfiring.

Jun 28, 2012 | Yamaha FJ 1100 Motorcycles

1 Answer

Was riding my ZZR600E out locally last week without when for no apparent reason the bike starts to misfire and I lose power at low revs. After limping home I take a look....fuel is fresh so not likely to...


You can check the primary and secondary resistances in the coils, dont know offhand the values, but the coils should be the same.
The fact is gets worse as it warms could mean a carb float is flooding,
The vacumn fuel tap can be a problem, this can also cause fuel to flood into the sump , and cause this problem.

Aug 15, 2011 | 1996 kawasaki ZZR 600

1 Answer

Fuel light came on,tank nearly empty,started bike up next morning and idles ok but badly misfires when try to accelerate,filled tank up with mobil 98 octane which i have used before and it still misfires...


Chances are condensation has collected in the carb float bowl. Drain the carb. Yes, keep the tank filled. This will lessen condensation. You may want to install a new spark plug as well.

Jun 15, 2011 | 2005 Aprilia SR 50 Ditech

1 Answer

Engine misfires around 5000 revs and sometimes


Give your bike a tune up, Plugs , Air filter, clean the carbs. Do these jobs one at a time till the problem goes away, Dirty fuel from leaving the bike unused can also give grief.
Happy hunting

Jun 06, 2010 | 2005 Yamaha FZS 1000 Fazer

1 Answer

My 2007 450F Yamaha won't start when it gets hot? Valves are in spec, went thru the carb, all clean??? Put a new hot start on too..still no workie?


hi there matey,, if she starts perfect wen shez cold ,,and u ride her up the road till shez hot,, does it start misfiring while u are riding it,then a quick check will be needed, if it does misfire then soon as she misfires while riding,,kill the engine and wip out the spark plugs and check wot the colour of the plugs are,, they should be a biscuit brown colour ,,either 1 and 4 plugs or 2 and 3 plugs will be the same ,, if say 1 and 4 are not a brown colour then u need to change that coil to 1 and 4,, at the end of the day mate ,, if she doesnt start wen hot ,,its usually a coil that is the prob,, any more help u need come back,, cheers

Mar 24, 2009 | 2004 Yamaha FZ6

Not finding what you are looking for?
2008 Yamaha XT 660 X Logo

780 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

mikeuk

Level 2 Expert

61 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1128 Answers

D. E. Hev

Level 3 Expert

1132 Answers

Are you a Yamaha Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...