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

Car has started give spluters when taking off from low revs but of at higher reves


Have catalytic converter checked. Additionally have a pressure check run on you fuel pump. Pump maybe getting ready to fail. Additionally change your fuel filter

Sep 17, 2015 | Cars & Trucks

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

Sputtering misfiring


Do you have a check engine light on?

Jun 30, 2013 | Fiat Cars & Trucks

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

Outboard 115 yamaha misfiring at low revs


clean carbs and check set up !

Oct 31, 2012 | Clymer Boating

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

Hello, I have a 2004 nissan sentra 1.6L, manual trans with 130K, good shape. Recently it has started to buck occasionally, usually in 2nd or 3rd gear. This became worse yesterday. Plugs are new (months),...


is the check engine light on? o2 sensors will set an engine code as well as set for lean or rich conditions. being a 2004 model if it is an engine misfire condition this also should set an engine code. most likely with the symptoms you have you have a plug wire getting a bad spot in it. as the engine gets hot the plug wire will cause an engine misfire.

Jul 27, 2011 | 2004 Nissan Sentra

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

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

782 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

278 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1144 Answers

D. E. Hev

Level 3 Expert

1167 Answers

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

Answer questions

Manuals & User Guides

Loading...