Question about 2004 Yamaha PW 50

1 Answer

Pw50 will not rev out and will hardly move when riding

Carb cleaned new plug is there some kind of adjust on the auto trans

Posted by Anonymous on

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1 Answer

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  • Yamaha Master
  • 59,811 Answers

Hi, Anonymous and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
http://forums.cycleworld.com/showthread.php?t=69315
PW50 won rev lots of things tried
DOWNLOAD Yamaha PW50 PW 50 Pe Wee 2007 2012 Service Repair Manual...
OEM parts for Yamaha
http://www.yamaha-motor.com/assets/service/manuals/2009/LIT-11626-22-24_PW50_1574.pdf

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Posted on Jan 09, 2017

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6 Suggested Answers

6ya6ya

6ya staff

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Posted on Jan 02, 2017

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Anonymous

  • 9 Answers

SOURCE: 2005 yamaha yzf 250-unstable idle

I had the same problem, Turns out that my shims were finished, replace the chims and check clearences.

Posted on Mar 12, 2009

tombones

  • 3567 Answers

SOURCE: Hyosun Scooter Carb Adjustments

Very good thought process on the adjustments. The throttle screw sets the idle speed and the air screw sets the fuel mix at idle speed. The stock setting is 1.5 turns outward. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward.

From this point you adjust the idle speed then adjust the air screw for fastest idle speed at that throttle screw setting. If the idle speed becomes faster than desired after adjustment, just reset the throttle screw and then reset the air screw.

A “very helpful” rating for this answer? Thanks!

Posted on Jun 27, 2009

Anonymous

  • 33 Answers

SOURCE: banshee wont rev

Usually related to TORS, specifically the safety switch in the clutch/park brake assembly. If it's defective the engine won't rev. Solution: look for a TORS removal kit.

Posted on Aug 21, 2009

tombones

  • 3567 Answers

SOURCE: my gilera stalker 50,will rev out on the main

Sounds like an air leak between the carb and cylinder. This would lean the fuel/air mix causing a lack of power on hills. It can also cause the bike to rev up by it's self on idle and flat surfaces. If the bike is not over 3 years old you should be able to tighten the manifold clamps and then tighten the manifold mount bolts. The rubber should still be soft enough to re-seal the connections. If over three years old the rubber seals and manifold connections are probably hard and cracked and will no longer seal properly. Just get new seals, gasket, and rubber manifold and you should be back in shape. If not, it is possible the crank seals are the problem. They can go bad and lean the mix. I mention the seals last because it is not an easy fix. I hope this helps.

Posted on Jan 23, 2010

sisadsl

gavin jones

  • 1508 Answers

SOURCE: Pw50 starts first time everytime but will not

PW have the stop\start\run switch and will not rev in the start position, there may be a problem in this switch, wire, or the ignition box which controlls this.
The small 50s can also build up carbon in the exhaust port, or the exit end of the muffler.
They also need the original air filter and cover (dont know why, but they wont rev without it).
I realize you may have checked some of these, but not much else goes wrong

Posted on Jun 08, 2011

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2 Answers

Pw50 starts but no power it wont rev.I have new carb,plug.clean filter.fresh gas


Hi, Anonymous and the usual suspects are:
1. Severely drained or faulty battery.
2. Faulty regulator/rectifier or high output coil.
3. Faulty power valve, solenoid or installation.
4. Clogged air filter or exhaust.
5. Cracked or incorrect float level.
6. Float needle is not seating.
7. Faulty reed valve.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
PW50 won rev lots of things tried
2002 PW50 sounds like its loaded up will not rev Mini Pe Wee
Yamaha PW50 2000 2005 manual collection Download Manuals Technical
OEM parts for Yamaha
Yamaha PW50 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Jan 25, 2014 | 2008 Yamaha PW50

1 Answer

50cc Scooter won't rev up, Keihin PD18J carb


my 50cc scooter will idle at first and rev very well but wont idle what can this be

Jul 08, 2012 | Motorcycles

1 Answer

Yamaha PW50 stalls when throttle applied


Hi, Rick 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. Vacuum line from the petcock to intake manifold cracked.
5. Float needle and seat sticking.
6. Float level too low.
7. Carburetor bowl vent line clogged/blocked/pinched.
8. Idle adjusting screw set too low.
9. Air/fuel mixture screw set too lean.
10. Idle port, transfer ports, slow air jet clogged.
11. Slow fuel jet clogged.
12. Faulty fuel pump.
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.
pw50 bogging down
PW50 won rev lots of things tried
https://books.google.com/books?id=ozV8-Aer4N8C&pg=PA84&dq=pw50+manual&hl=en&ei=TCS2TcbdJ4PW0QG0z9jmDw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CGUQ6AEwAA#v=onepage&q=pw50%20manual&f=false
OEM parts for Yamaha
Yamaha PW50 Owner Manual

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

May 27, 2017 | 2005 Yamaha PW 50

1 Answer

Wont start


hello ,your engine is a tecumseh HMSK90-156525D, Sounds like carb. may need adjusting. Take the heat box off to expose carb. the heat box is the metal box surrounding the caeb., there should be 2 adjustment screws- 1 on the bottom of the bowl and 1 on the side of the carb just above the edge of the bowl ( depending how the carb sets off the engine - if the carb comes straight out it will be on the side facing towards the front of the snow blower or if it goes towards the handles then standing other side of the snow blower the screw will be facing you), turn both screws in til they just bottom out the turn them out 1 1/4 turns out then start the machine. While the machine is running at low idle turn the screw on the side of the carb. in (clockwise) a little at a time listening for the engine to start to rev up and then start to rev down, bog or studder then turn back slightly to bring idle back up. Once the idle is up then the screw on the very top of the carb. turn that out to lower idle to a normal idle. Repeat those adjustments till you cant get the idle to go up anymore. Now for the screw on the bottom of the bowl- move the throttle up to max and turn the screw in till you hear it rev up higher and starts to bog or sputter then turn it back slightly to bring the high rev to a smooth rev. That should take care of it. If it does not solve it then the carb may need cleaning then the adjustments done again. If you need more help on this please feel free to ask. Sometimes you have to do process of elimination and you start with the easiest first. Also the adjustments should help with the carbon build up on the plug.692509.pdf (application/pdf Object)
i have included the manual to give you a good understanding of the carb, page 7 to 25, hope this helps,don't forget the 4 thumbs up,any comments welcome,thank you.~~

Feb 15, 2012 | Garden

1 Answer

Pw 50, cleaned air filter,put new plug in,bike starts fine,then feels like choke is on and bogs down,plug is wet ,smells of petrol,,,,no power , tried running to clear through ,sputters then sounds...


cover up the drilled holes this can cause problems, why was a new carb fitted? did the shop have it running?
not likely rings .
check carb for flooding and correct jet sizes.
check safety kill\start\run switch for shorts.

Feb 25, 2011 | Yamaha DT 125 X Motorcycles

1 Answer

Aprilllia rs 125 wont idle and when im riding it cuts out at low revs and sputters when riding


some things to try,
adjust the idle using the black knob on the carb,
check air filter is clean,
remove and clean carb

Oct 19, 2009 | 2003 Aprilia RS 125

1 Answer

I have a Ryobi weed eater that will not rev up.


just find the exaust outlet and clean it. usually that gets plugged and causes the engine not to rev up.

May 02, 2009 | Black & Decker 19" Electric Lawnhog...

1 Answer

Have a toro power stage max model 826LE electric start, runs irre


Sounds like carb. may need adjusting. Take the heat box off to expose carb., there should be 2 adjustment screws- 1 on the bottom of the bowl and 1 on the side of the carb just above the edge of the bowl ( depending how the carb sets off the engine - if the carb comes straight out it will be on the side facing towards the front of the snow blower or if it goes towards the handles then standing other side of the snow blower the screw will be facing you), turn both screws in til they just bottom out the turn them out 1 1/4 turns out then start the machine. While the machine is running at low idle turn the screw on the side of the carb. in (clockwise) a little at a time listening for the engine to start to rev up and then start to rev down, bog or studder then turn back slightly to bring idle back up. Once the idle is up then the screw on the very top of the carb. turn that out to lower idle to a normal idle. Repeat those adjustments till you cant get the idle to go up anymore. Now for the screw on the bottom of the bowl- move the throttle up to max and turn the screw in till you hear it rev up higher and starts to bog or sputter then turn it back slightly to bring the high rev to a smooth rev. That should take care of it. If it does not solve it then the carb may need cleaning then the adjustments done again. If you need more help on this please feel free to ask. Sometimes you have to do process of elimination and you start with the easiest first. Also the adjustments should help with the carbon build up on the plug.

Jan 15, 2009 | Agri-Fab Agri - Fab Snow Blower - 42"

1 Answer

Pw50 problems stating bike


hey there matey,, just to run a few things with,, have u taken the spark plug out and cleaned it up,,try a new plug 1st,, to be sure, or if u have a new plug,, take out the spark plug place it back in its cap and rest it on the cylinder head and either elec start it or kick it over and make sure u have a spark ,, if all is ok on the above,, then turn to fuel and carburetta, make sure fuel is gettin to the carb 1st,, but u say u do eventually gettin it goin ,,then theres a blockage in jets ,,undu the bottom of the carb clean out the bowl, ,in the carb u will see a brass jet, un screw that and the needle guide that the jets screwed in to and using a pin or needle,poke the small hole clean so u can see light threw them,, bung it all back together and pray,, if no joy il get back to ,, ok m8, enjoy

Jan 10, 2009 | Yamaha G5 Motorcycles

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