Question about 2004 Honda XR 250 R

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Honda 125 wont restart when warm.new plug dirty black gray,is it too rich even when new it would stop ,I would blow into the tak then Ok but that is a different problem

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  • ffaa2 May 11, 2010

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Low speed jet is clogged

Posted on May 03, 2010

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I put my Honda nsr 125 on a warm up after a warm up revved up then it cut &won't start back up , iknow the power valve servo has gone paid for one , has had new spark plug and air filter does spark


Hi Anonymous, and the usual suspects are:
1. Enrichner system plugged, not properly functioning or improperly operated.
2. Fuel overflow.
3. Restricted fuel supply.
4. Gas cap and or fuel tank not venting properly.
5. Plugged slow jet or passages.
6. Inlet system air leak.
For more information about your issue please visit the websites below. Good luck and have a nice day.
Honda NSR 125 won't start after cold Xmas
My Nsr 125 Wont Start Please Help
1988 1994 Honda NSR125 Service Manual Moto Data Project
http://www.vol-training.com/guides/honda-nsr-125-parts-manual.pdf
Honda nsr 125 Owners manual

Jan 02, 2016 | Honda Motorcycles

1 Answer

Honda anf 125 innova i spark fault


Is the spark plug set at the right gap if the old plug is light brown its running OK if it darker or ioly its running rich or very light its running too lean

Apr 08, 2014 | 2006 Honda ANF125 Innova

1 Answer

1963 allstate 125 scooter will run like new than it won,t start even thought it's getting spark and gas


Hi! I assume your problem only applies when the engine is hot. This could be one of several things:
1 - bad seals 2 - broken engine body (heat expands it and lets air in / compression out) 3 - related to above, but happening on top end (cylinder/head)
All these are hard to fix at home, but there it could also be related to a carb problem... imagine your scooter is running too rich, it will run ok for the first kms, but after you stop and because the plug is dirty and/or the engine is flooded, it wont start anymore.
When this happened did you check the sparkplug look (is it dark? dry or oily?)
Hope this helps! Regards

Feb 08, 2011 | Peg Perego Vespa Scooter

2 Answers

Air fuel mixture adjustment 04 honda 125 innova anf


the jetting should not be a problem, perhaps the air cleaner element is dirty or the element even if it looks ok sometimes needs a new one, the smaller motors often rely on the right intake vacumn through the filter for the carbs to work as designed

May 19, 2010 | 2006 Honda ANF125 Innova

2 Answers

04 honda innova 125 black smoke and constant misfire


Black smoke means that the fuel mixture is way too rich (too much fuel), and the mis-fire is most likely due to carbon fouling of the spark plugs because of the rich condition of the air fuel mixture. Be sure that the air filter is clean, and that you are not running the engine with the choke on.

May 10, 2010 | 2006 Honda ANF125 Innova

2 Answers

Honda lead 100cc scooter wont start atall.changed the spark plug and filter still no luck.doesnt seem to be getting petrol to the spark plug


maby you have touched somthing on the carb when you changed the air filter or maby spark plug is to big or maby faulty try new one or your old one

Apr 13, 2010 | 2007 Honda XL 125 V Varadero

1 Answer

My spark plugs seem to soot up, is the mixture wrong. will the jets need setting. i have a heritage classic year 2000


Yeah the mixture is too rich.Didn't say but are both plugs sooty?Anyway,if jets have been ok then all they could be is dirty and you'd have other problems.Take air cleaner off and make sure choke plate is fully open with choke lever off.Adjust all the fuel/air screws for proper idle and throttle response.Check voltage of spark from coil.Then try differant heat ranges in plugs to get hotter fire.Just a thought.Are you sure it's soot and not oil residue?Oh yeah,when you have new plugs in before you fire it up wipe out the ends of the pipes,real clean.Then after it runs awhile look at the pipes.Sooty? gray?black?Gray or lite tan is best.Try heat ranges til you're happy.

Mar 20, 2010 | 2000 Harley Davidson FLSTC Heritage...

1 Answer

I have a 2002 CR 125. Runs great but has black fluid that comes out of tail pipe after running. I feel it is running too rich. What should the air/ fuel mixture screw be set at?


The mixture screw is used to get the transition from idle to throttle up smooth, and not to bog.
Sounds like your jetting is to rich, or too big. Read your plug as it's probably black. Then go smaller on your pilot jet, run it and read it again. Make sure you run 32:1 mix, and jet the bike to match this.

Dec 10, 2009 | 2002 Honda CR 125 R

1 Answer

In my honda xlr 125 i changed the main jet to #92 and slow jet to #35 is this ok? If so how can i tune the carb. I am from Sri Lanka. Its a tropical country.


The only way to know if the jetting is correct is to see how well it runs - and check the spark plug color.
You can start by warming up the engine and adjusting the idle mixture. Do this by turning the idle mixture adjustment screw (there are only two adjustment screws on the carburetor: one is the idle speed adjustment, the other is the idle mixture adjustment). Turn the idle mixture adjustment screw in or out until the fastest idle speed is attained. Then adjust the idle speed with the idle speed adjustment screw.
Now ride at full power and see how well it performs. If the engine cuts out or surges at full throttle, that means the main jet is too small. If the engine produces black smoke from the exhaust and doesn't seem to produce enough power, then the main jet is probably too big. Confirm the main jet correctness by looking at the color of the spark plug: white or light tan = too lean (main jet too small). Dark brown or black = too rich. Dark tan to brown color = perfect.

Nov 29, 2009 | 2000 Honda XLR 125 R

1 Answer

Help. my sons derbi send r 125 wont start. all


have you checked your air filter. If its dirty wash out with air filter cleaner or petrol and replace.

Feb 21, 2009 | 2006 Derbi Senda R 125 4T

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