Question about Motorcycles

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Yamaha r50 The bike has been left for 6 months was running fine, but has just been sat there ever since. It won't start with the button it trys but it isn't going to. I have managed to bump it had it reving for around 20 seconds but then keeps dying I have no idea please someone help me :)

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  • george sullivan Jan 07, 2014

    hi ya stretch! sorry for the late reply happy new year, I finally had the bike started it was going all well I was able to drive after cleaning the carb and the idle jets. The only problem is... is that it's not ticking over they're has to be a constant rev on the bike otherwise it just cuts out any ideas? Thank you

  • Strech
    Strech Jan 07, 2014

    First, try idle speed screw adjustment to speed up the idle, then try working the idle mixture screw. If not, the ide jet might still be plugged. A new one is probably less than $10

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  • Motorcycles Master
  • 1,554 Answers

Sounds like the gas went bad and plugged up the idle jets in the carb.

When gas sits too long, it's components start to separate (simplistic explanation), and turns almost into a varnish.

This starts plugging up things, starting with the smallest orifice, which is the idle circuit.

Take carb apart, and clean out idle circuit.
Clean/replace idle jet.

Posted on Nov 24, 2013

  • 5 more comments 
  • george sullivan Nov 24, 2013

    Thanks for your reply, so if I clean the carb up it should start right? Where is the jet etc thanks again

  • Strech
    Strech Nov 24, 2013

    It should run after.

  • Strech
    Strech Nov 24, 2013

    You said it's a Yamaha r50. Give me a model year and I can find an exploded diagram of your carb that will show the idle jet.

  • george sullivan Jan 07, 2014

    Where is this locates

  • george sullivan Jan 07, 2014

    Thanks for your help

  • Strech
    Strech Jan 07, 2014

    Give me a model YEAR, please.

  • george sullivan Jan 07, 2014

    I will have to get in touch tomorrow to let you know as I'm unable to tell you at the moment thanks all again

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SOURCE: 1991 CR 500 (reving to high on idle high serges)

take some wd 40 & spray around the carb boot while running to see if the idle drops for a few seconds. sounds like you have an intake side air leak causing a lean condition making the motor rev high.

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SOURCE: wont run /idle

i'd start with removing the carbs and giving them a thorough cleaning as when bikes sit for so long, the carbs begin to get gummy/varnished from the old gas.

check for blocked holes in the pilot jet & main jet and look for "hard & dried up" gas in passages. be careful of the float bowl gasket as to not tear it or you will need a replacement.

Posted on Mar 06, 2009

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SOURCE: 2002 Yamaha V-Star Classic 1100 Will not run over 70 MPH

Hi,
The first thing you need to check is the air filter. Sometimes critters can get into the airbox when a bike sits for awhile. Sounds crazy, but it has happened to me. If nothing is blocking the filter, give it a quick clean since you have it out.
Next things to check:
Faulty diaphragm
Improperly adjusted fuel level
Clogged or loose main jet
Faulty fuel pump
You may not be able to check these on your own, but these are the next likely culprits.
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SOURCE: low compression on my kxf250.2004 bike doesnt kick,bike runs fine

It sounds like time to do a top end job. The head will need to come off, then the valves should be re-seated. Carbon should be removed from the head and piston crown. Since you did not mention any engine smoking, I assume the rings are okay. If you are going to do anything with the cylinder, piston and rings, now would be a good time. But remember, if it isn't broken don't fix it.

If you do the work yourself be sure to start with the piston on TDC compression. Note the timing marks stamped on the overhead cam. The piston and marks will need to be in the same position when reassembling.

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


Posted on Jun 05, 2009

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