Question about Yamaha XT 660 X Motorcycles

1 Answer

Engine runs intermidently when under load,fine at idle or in neutral. Has a clean carb, good gas flow, clean air, and new plug, almost feels like like governer at 5mph and above

Posted by on

Ad

1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

CHANGE SPARK PLUGS. IF YOU ALREADY DID THIS, DO IT AGAIN AND USE RECOMMENDED BRAND. THEN TEST COILS.

Posted on Jul 28, 2010

Ad

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

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

I have a Troy Bilt trimmer model TB675EC...4 cycle engine. Problem that has arisen is that it dies at high speed and under load. Starts up and runs at idle well.


Fuel starved, carb should have an idle adjustment which sounds like it is fine. Look for the second adjustment

Jul 17, 2017 | Troy Garden

2 Answers

Why does my 1964 ford fairlane 500 3 speed manual trans. Run rough when not under load.


Hey Fred, I AM SOOOOO JEALOUS!!! My teenage years Saturday nights were spent in a 64 Fairlane...(4 speed - 390 - WOW!!)..
Any way.. your carb needs some TLC, a valve clearance setting-get a qualified pro to do this!!), new spark plugs (wires maybe) .. a new air filter.... mainly the carb needs a QUALIFIED PROFESSIONAL to clean and set it once you have put in the plugs/air filter.. This will eliminate possible rough idle issues and give the mechanic peace of mind when he is adjusting the carb.
Good luck...

Jul 04, 2017 | Ford Cars & Trucks

3 Answers

When i come to a stop the car wants to die unless u keep ur foot on the gas


Hi Wendi:
If the engine runs fine except when you don't have your foot on the gas, maybe the idle stop needs to be adjusted. With the engine off, have someone step on the gas pedal while you look at the linkage at the carb. There should be a plate with a screw in it that keeps the butterfly valve from closing completely. This can be adjusted with the engine running. (SAFETY FIRST - MOVING PARTS CAN BITE)
If the engine will only run at not nice too high RPM, chances are that the idle jet in the carb is plugged, and a carb cleaning and possibly overhaul may be needed.

Mar 22, 2015 | Cars & Trucks

1 Answer

Will not run at low idle


Fresh gas.new fuel filter and fuel lines and clean carb and screen and make sure your diaphrams are good, preset your jets 1-1/2 and run and fine tune once you get it going, also check your exhaust port and screen for being plugged

Dec 08, 2011 | Poulan Garden

3 Answers

Front cylinder misfire at idle,then raise rpm's to 2000 area an it comes in an out popping thru exhaust.front cylinder cold to the touch when rear is hot, till it runs a couple of min. New plugs, good...


I am not sure if the bike is a 650 or 1100 but in either case it sounds like a fuel issue or and air leak. When the carbs were off for re-jetting did they get cleaned? The slow circuit controls to about 2000 rpm and it sounds similar to your problem.

The first thing to look at is the carb synchronization. If the front cylinder is lagging, it can give the same symptoms. I do not think that the exhaust is a factor because the front is cold when running.

Spray some WD 40 at all the intake manifold area when the bike is running and see if the idle changes. the idle will change and push some smoke out of the exhast if the intake is leaking.

If both of these check good I would pull the carbs back off and clean the slow circuits out completely. This is delicate work and shoud be done by and experienced tech.

If I can help some more just send message.

I hope that his helps. Steve

Jan 18, 2011 | 2004 Yamaha V Star Classic

2 Answers

Our HMSK 80-110 electric start snowblower starts up right away, but the idling is very rough. It runs very smoothly when it is engaged in snow throwing.


The Tecumseh snow motors are notorious for idling rough. Especially the last few years of production. Most service techs just say "live with it" But there are a couple of things you can do to help.
It is not a carb adjustment issue. It's usually a fuel, clean carb issue.
First, use a premium grade fuel without ethanol and a fuel stabilizer. This will give you the best fuel mix.
Second, Remove the carburetor shield and clean the inside and outside of the carb with carb cleaner. Even though you can't see the carb usually, they do get varnish build up and cleaning it will help some.
Third, Put the recommended amount of fuel system cleaner in the gas. I use Sea Foam brand. Over a tank full or two you will notice a difference in how the engine idles.
Fourth, Use a high quality spark plug and use a new one every year. Make sure the gap is correct.
Good Luck! Feel free to as any other questions you may have. Don't forget to rate this answer!

Jan 14, 2011 | Tecumseh Horizontal Tiller Engine 8 Hp, 1"...

1 Answer

19 hp kawasaki carb acting up


sounds like the carb is gummed up from the old gas you will need to clean and rebuild te carb(this is a easy job)...good luck

Apr 04, 2010 | Garden

2 Answers

400 Eiger ATV, starts and runs fine, stalls the


If 2 stroke check crank seals, check plug cap for proper resistance,check for good fuel flow to carb.Spark should jump at least a 1/4" gap,NOT JUST the .030 or plug gap.

Sep 08, 2009 | 2004 Suzuki DR-Z 400 E

2 Answers

I have a 1994 Yamaha 40 HP 3 cylinder 2 stroke engine starts and runs fine in neutral try to accelerate under load and it only will pull about 2800-3000 RPMs and wont go any faster it will rev fine in...


Reving in neutral does not mean the same thing as under load. If you need to pull 4500rpm under load and for an instant the load was gone, you would probably overrev to 6500. With the cover off and motor not running move the throttle to full forward. Look at your carbs and see if the throttle plates are wide open. If they are not all wide open take it back to the dealer. The throttle adjustment is off. You need the full range of travel from idle to topend.

Jun 25, 2009 | Light Outboard Motor Boat Bass Fishing...

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

28 people viewed this question

Ask a Question

Usually answered in minutes!

Top Yamaha Experts

dhnguyen

Level 2 Expert

281 Answers

Steve Sweetleaf
Steve Sweetleaf

Level 3 Expert

1147 Answers

Tony

Level 3 Expert

2600 Answers

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

Answer questions

Manuals & User Guides

Loading...