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My pw80 will only run with the choke on, i have cleaned the carb twice, no help, any suggestions?

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THIS IS FOR ALL YAMA PW80 (Choke on running issue)...had same problem. SWITCH OUT pilot/slow jet to a #25 -stock should be a #15................works wonders !!!!!!!

Posted on Jul 29, 2014

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 66 Answers

SOURCE: 2003 yzf450 wont run right?

recheck pilot jet & pilot circuit.also check compression

Posted on Feb 16, 2009

  • 3567 Answers

SOURCE: 94 pw80 floods with 2cycle oil

Sounds like the automatic oiler has gone berserk. Personally, I would save the repair bucks and just drain (and remove if you want to), the oil tank. Then just do like most of the other bikes do. Add four ounces, (32/1), of 2 stroke oil to each gallon of gas.

If your model is an air cooled bike you might want to remove the head and flush the crank cavity. De-carbon the top end while you are at it. If water cooled , remove the carb and manifold and flush through the intake. Both methods are best done with the engine out of the frame.

Please rate this answer. Thanks Jesse!

Posted on Mar 29, 2009

SOURCE: 2003 yamaha wrf 250 carb problem

(1) You will need to adjust the float pin to get the correct amount of fuel in the float chamber of the carburator.
(2) You will also need to set the air-mixture screw , but before you do tht remove the spark plug and see whats the condition of it, is it black , is it brownish, or is it whitish.
If its blackish = means rich too much of fuel, if its browinsh= ok, if its whitish = its too lean.
(3) As for hesitation, check the needle at carbs piston on the accelerator cable, and blow the main jet with high pressure.
(4) Check too the spark plug gap and if its as per the manufacturers specs.

Hope this helps!

Posted on May 12, 2009

  • 3567 Answers

SOURCE: 96 dr200 sittig up for 2 yrs. starving for fuel

Get some carb cleaner. Remove and clean the Nozzle, choke and main jet. Remove the pilot jet and air jet but count the number of turns to remove each one and put them back the same number of turns. Don't mess with the needle or clip or the pilot screw and plug at this time. Clean the carb thoroughly. Don't get carb cleaner on the diaphragm. If able, submerge the carb in cleaner overnight.
Let me know what happens by posting a comment.


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Posted on Jun 27, 2009

  • 3567 Answers

SOURCE: starts and stays running with choke on. stalls

Pay special attention to the parts in red. DO NOT mix parts from the front carb with parts from the back carb. When removing adjuster screws and jets, count the number of turns to remove them, write it down, and replace with the same number of turns.

Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx

Go to this site and you can download a free PDF service manual.
www.carlsalter.com/motorcycle-manuals.asp Most all of the manuals are in English but some are not. There is no way to be sure without doing the download. You can always delete it if in a foreign language.
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A “very helpful” rating on this answer? Thanks!

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Posted on Jul 02, 2009

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I just bought a second hand 05 Yz250f and it cranks on the first kick but will only idle if the choke is on. Back fires on accel and decel with the choke off. Took the carb apart twice and cleaned every...


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