Question about 2006 Yamaha Ybr 125

1 Answer

Starting problem last couple of week had starting problem with bike change plug but still having problems were do I look next ?

Posted by Anonymous on

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  • Yamaha Master
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Hi, Anonymous and the usual suspects are:
1. Spark plugs in bad condition or have an improper gap or are partially fouled.
2. Spark plug cables in bad condition.
3. Battery damaged or nearly discharged, should have 12.5 volts.
4. 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.
5. Throttle controls not adjusted correctly.
6. Water or dirt in the fuel system.
7. Water or dirt in the carburetor.
8. Intake air leak.
9. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow.
10. Enricher valve inoperative.
11. Engine lubricant to heavy (winter operation).
12. Ignition is not functioning properly (possible sensor failure).
13. Faulty ignition coil.
14. Valves sticking.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
https://yamahaclub.com/forums/topic/22523-ybr-125-starting-problems
WHAT TO DO IF YOUR BIKE WON START
Yamaha YBR250 2007 Service Manual Download Manuals Technical
OEM parts for Yamaha
Yamaha YBR250 Owner Manual

Posted on Nov 23, 2016

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Posted on Jan 02, 2017

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SOURCE: yamaha yz125 wont start...

hello there guys, listen a top tip is when the engine's cold tip the bike almost right on its side nearly touching the floof, wait for the petrol to poor out of the carb over flow pipe, this should take a matter of a few seconds, stand the bike back up again and kick and that baby should start right up, if it does then you have a problem with your float, if it still doesn,t then take it to a shop and get them to check it out, hope this helps. regards sam

Posted on Jan 24, 2009

  • 1 Answer

SOURCE: cold starting problems 1981 yamaha maxim 400

I had the same problem. I found that the ground on the wire harness under the seat was not grounded! It is worth a check.

Posted on Jul 15, 2009

  • 207 Answers

SOURCE: trx 850 just serviced.new plugs and

if u have a bad battery in it u r not gonna run right or at all even jumping it off if u have a new battery trychanging the gasif the gas has sat for 3 months or longer it goes bad and cloggs up carburator and if thats he case ur gonna have to pull ur carbs and clean the thoroughly

Posted on Feb 24, 2010

  • 314 Answers

SOURCE: my bike will not start, it sounds like it doesnt

Firstly check that you have a spark at the plug gap and if so is the plug wet with fuel ?If so on both counts try rubbing a pencil lead on the plugs gap ,this may sound daft but the lead from the pencil increases your sparks power five times .But only use this idea when bike fails to fire .if problem carries on check your air cleaner unit ,and if dirty change it .

Posted on Apr 26, 2010

  • 56 Answers

SOURCE: fjr 1300 02 plate i

will it turn over,if yes add fuel sta-bil you can get this at any auto part store.The gas you buy now days only has a shelf life of 3 weeks,so make sure you add to fuel if your bike will be sitting for more than that.

Posted on Apr 30, 2011

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Fjr 1300 02 plate i have not used the bike since last summer only starting the bike every couple of weeks now it wont start at all there are no fault codes shoeing on the management system i have checked...


will it turn over,if yes add fuel sta-bil you can get this at any auto part store.The gas you buy now days only has a shelf life of 3 weeks,so make sure you add to fuel if your bike will be sitting for more than that.

Apr 30, 2011 | Yamaha FJR 1300 Motorcycles

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Engine will not turn over. Has been started every week for the past 4 months but not run on the road. Last started on friday last week with no problems. Battery is charged, fuel is on and full. Tank has...


If you are starting the bike, warming it up, and shutting it off, You have probably fouled out the spark plugs. When I worked at a dealership we stopped the practice of starting up the cycles for potential buyers because each bike would foul out 3,4,even 5 sets of plugs before it was delivered just because people wanted to hear it run.

Jan 25, 2011 | Honda Deauville NTV 650 Motorcycles

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Motorcycle starts and will run for 3to 5 minutes and will die out while riding and will not start after it dies out but after 5 minutes it will start again and run for a short period of time i put new fuel...


Ok, you've either got a lose of spark problem or a fuel problem. To solve your problem, you've got to figure out which one you've got. The next time it does this, take a spare set of spark plugs and put them in the plug wires. Ground them good to the engine and press the start button while watching them. Do you have a good spark. If so, now you've narrowed your problem to a fuel issue. If not, you've got an electrical problem.

Fuel problems are the simpliest. First, loosen but don't remove your gas cap and ride the bike. If this fixes the problem, replace the fuel cap as the vent valve in the cap has went bad. Check for full fuel fuel flow through the petcock. Your bike may have one of the vacuum operated petcocks. These are notorious for giving problems. I'd suggest replacing it with a high quality manually operated petcock if it proves to be your problem. To test it, remove the fuel hose and the smaller vacuum hose on the rear of the petcock. Using a hand operated vacuum pump. apply vacuum to the nipple on the backside of the petcock. You should have a full flow of fuel through the petcock. If not, replace the thing.

If you don't have a spark when you check the plugs, start carrying a can of "component cooler" with you. The next time it does this, spray the ignition module and see if that brings the bike back to life immediately. Try spraying the pickup module in the timer cavity. You may have to drill the rivets out of the cover to get to this component. Do not replace the rivets with standard rivets,,They're special rivets, get them a the Harley shop. When you spray something with the component cooler and your bike come back to life immediately. You've found a temp problem. Replace that component.

Good Luck
Steve

Aug 05, 2010 | 2001 Harley Davidson XL Sportster 883

1 Answer

My bike will not start, it sounds like it doesnt even want to start i have just replaced the spark plug last week due to the same problem and it started first kick


Firstly check that you have a spark at the plug gap and if so is the plug wet with fuel ?If so on both counts try rubbing a pencil lead on the plugs gap ,this may sound daft but the lead from the pencil increases your sparks power five times .But only use this idea when bike fails to fire .if problem carries on check your air cleaner unit ,and if dirty change it .

Apr 26, 2010 | 2003 Yamaha YZ 125

1 Answer

Loss of power bike under performing


Check the spark plugs, they may need replacing.

Nov 20, 2009 | 1999 Yamaha FZX 250 Zeal

1 Answer

Wont fire turns over faster than normal


if you still havent started the bike yet from sitting.then i dont think the choke has anything to do with your problem.but ether way take the plugs out.I think your piston rings are frozen from sitting.did u winterrize it?with the plugs out pour a little auto trans fluid in each cylinder.very little.now crank the bike over to coat the cylinders. becareful it could be messy now let the bike sit overnight.the next day crank bike over again.but this time for a few tries.then install fresh plugs.and try to start it.p.s there will be white smoke from the transmission fluid. that will go away in a couple of minutes.then all should be good.

Mar 09, 2009 | 2000 Yamaha YZF-R1

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