Question about 2004 Yamaha PW 50
Hi, Jj9871 and the usual suspects are:
1. Fuel cap or fuel tank is not venting properly.
2. Fuel filter clogged.
3. Fuel line pinched or kinked.
4. Float needle and seat sticking.
5. Float level too low.
6. Carburetor bowl vent line clogged/blocked/pinched.
7. Idle adjusting screw set too low.
8. Air/fuel mixture screw set too lean.
9. Idle port, transfer ports, slow air jet clogged.
10. Slow fuel jet clogged.
11. Faulty fuel pump.
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pw50 won start please help
My Son Has Yamaha Pw50 That Will Start But Won Stay Runn
OEM parts for Yamaha
Yamaha PW50 Owner Manual
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Posted on Apr 25, 2017
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Posted on Jan 02, 2017
Most likely a combination of sparkplug heat range (type of plug) and jetting, needle or air mixture settings in the carburetor. Assuming good condition of air filter and operation of the choke plunger. Are you using the correct octane fuel and fuel/oil ratio? Give the plug a clean and emery the spark contacts, set gap at 0.7mm., ideally take the plug to a Yammy dealer and check for correct range for your bike in the area where you ride.
Best to have a range of spare clean plugs handy for wet or hot days etc.
The jetting maybe dirty or wrong size too. In the meantime move the throttle needle clip down one notch. Refer to the site below for a diagram of the carburetor parts. Cheers.
Posted on May 11, 2010
SOURCE: Honda, 80 elite with 41
First make sure that the bystarter is indeed functional: look at it, it should move when powered. Simple test to confirm that: remove the screws that hold the unit into the carb, and lift the choke slightly out of the carb body while cranking the engine : if it runs, then the carb is ok, choke is not. If necessary remove the air filter, put your hand in front of the carburetor to choke it even more and then start the motor.
If the engine dies even now then the problem is in the carburetor: either the idle is badly adjusted or the level in the bowl is too low.
Posted on Aug 04, 2011
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