Question about Yamaha YZF-R125 Motorcycles

1 Answer

2000 yahama yz85 will not run ...backfires through carb...firing out of time ...could really use some info on how to repair...

Posted by on

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Expert
  • 430 Answers

Assuming fuel system is water free with fresh fuel and a new spark plug; then I would start by checking the pulser coil.

Posted on Nov 20, 2009

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

I have 03 kawasaki praire 650 v-twin its backfiring through front carb and wont run whats wrong


Backfiring through a carb is indicative of over advanced ignition. The spark is firing the fuel too early and exploding through the carburettor, instead of firing the piston over Top Dead Centre (TDC).

Another possibility is a damaged valve, do a compression test and get the timing checked.

Jan 02, 2016 | kawasaki Motorcycles

1 Answer

Mixture srew settings on yz85


Hi, Anonymous for this scenario you will need your service/owners manual if you can't find the first and best tool you ever bought for your Yamaha, despair not, for a mere zero $0 you can download another one. For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
2013 yz85 carb adjustment
Dirt Bike Carb adjustment
YAMAHA YZ85 LC Owner Service Manual
OEM parts for Yamaha
YAMAHA YZ85 Owner Manual

Aug 04, 2012 | 2007 Yamaha yZ 85

1 Answer

I have a 95 Road King that isn't running right, it


Backfiring out of the exhaust is usually an ignition problem. Unburned fuel is getting into the exhaust system because it's not being ignited in the cylinder. When the engine fires on that cylinder again, it ignites the raw fuel in the exhaust causing the pop that people call a backfire. I'd investigate the ignition system. Connect a timing light to each of the spark plug wires if it has a single fire ignition or either of them if the ignition system is the stock dual fire. Start the engine and watch the timing light to tell if the engine is missing as the light will miss a flash.

Good Luck
Steve

Jun 05, 2011 | 2000 Harley Davidson FLHR-FLHRI Road king

1 Answer

Front carb backfires through exhaust and no power


This really sounds like a timing issue.
May I suggest a trip to your local library. Cycle repair books should be in 646 stacks of reference.
The plug is firing at the wrong time.

Oct 06, 2009 | 1993 Suzuki VS 1400 Intruder

1 Answer

Motor backfires


Hi,
It sounds like your engine is firing out of time.
Here is a link to the manual for your engine. It does contain some good info and I hope it will help you to solve this problem.

http://www.gardenresources.co.uk/content/garden_machinery/manuals/husqwm227_hwen2002_0000000-01.pdf

Best of luck!

Aug 31, 2009 | Garden

1 Answer

My vulcan 1500 1997 back fire somme time wy


lean gas mixture. or the valve timing is off, but probably both. A lean mix will run really hot and allow for secondary combustion in the pipes (backfire) when the valves let even a bit of uncombusted gas through. My guess is that the bike hasn't had the carbs cleaned out thoroughly in a while. Run a half can of Sea Foam with your full tank of gas to help clean out the carbs, but really you should take them apart and dip them to clean everything out. Also you could adjust your pilot screw settings to make it run a bit more rich, but then you are just compensating for the dirty carbs. That's just my guess.

Jul 22, 2009 | kawasaki Full Suspension Mountain Bike Men

1 Answer

Had the head redone, new Carb fitted, new distributor cover and leads new spark plugs, crank timing set to mark (0)and cam timing (2e)set to mark on head. the engine swings, fires from the carb, spark on...


Sounds like you have your timing off. If it is backfiring, that means that 2 of your wires are crossed, causing the plugs to fire on the exhaust stroke versus the compression stroke. Recheck your timing.

Jun 07, 2009 | 1984 Toyota Corolla

1 Answer

1967 barracuda carb backfires do I adjust screws in or out?


I would check the float level first if you are going to adjust the carb., carters like to flood and if you check your spark plugs you can tell if your running rich. The other adjustment you will make with a simple vacuum gauge.You should probally check distributor points,and timing as well. More info would help, like is it back firing up the carb or out the exhaust or when accelerrating or decelerating.

May 22, 2009 | 2006 Plymouth Scamp

1 Answer

Samurai backfire


It sounds more like a timing problem. If it backfires through the carb that means the intake valve is open when the spark plug fires. Same with the exaust but it the exhaust valve that is open.

Dec 14, 2008 | 1986 Suzuki Samurai

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

274 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

1144 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...