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Iv got a moto 4 250 it will crank and run but when you give it gas it dies.iv clean the carb as long as you hold ur hand over the beather you can ride it for a min but then dies but it will idile

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Hi Brandon:
I'd be suspicious that the high speed jet in the carb is plugged, and would suggest that you give the carb a really good cleaning.
Is there a fuel filter?
Is there any chance that you've gotten some contaminated fuel?
Try draining the carb into a glass jar and look for water, dirt, jelly etc. in the gas.

Posted on Apr 29, 2015

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Posted on Jan 02, 2017

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SOURCE: motorcycle dies while riding,like gas is cut off

Most likely your high speed needle valve seat has dirt in it. Try removeing the bowl and cleaning the Main Jet.

Posted on Jun 01, 2009

  • 163 Answers

SOURCE: 1985 yamaha moto 4 200 power surges

Check the carbs if all jets are well placed, needles all at same height, float levels equal, collars between carbs and cil head all tight, rubbers not punctured or broken...

Posted on Aug 22, 2009

  • 2 Answers

SOURCE: motorcycle dies while riding,like gas is cut off

Check fuel pump. You might have a bad diaphragm.

Posted on Sep 06, 2009

  • 47 Answers

SOURCE: how do i clean my carbs on a 2004 ninja 500?

You need to remove the seat,sidecovers. Then take both sides off of air box (so you can move it slightly) remove fuel line (turn petcock off first) remove vacumm line from the tank and remove tank. Then take a philips screw driver and loosen the clamps on the carb boots.At the air box boots take a small flat screw driver and roll thye springs back. Disconect the choke cable.use a 10mm wrench and loosen adjusting bolt on throttle both the push and the pull side.unscrew the cables out of the braket. pull backon the airbox as you tilt the carbs up toward the airbox and they should come out.once removed you will need a philips,narrow flat head.and a 10mm wrench. drain fuel from carbs and remove bowls. take one carb apart at a time so not to mix floats and needles up.pull the pin holding the floatand remove the needle sholud come out with it.use the 10mm to take out the needle seat(don't loose the washer).
look down the holes in the bottom and you will see screws this is your pilot jet.BE VERY CAREFUL UNSCREWING THE JET AS IT IS BRASS AND WILL STRIP VERY EASILY. Turn the carbs over and remove tophats,srping and slide.turn your air mixture screw in until it hits bottom and count the turns (usually about 21/2 to 3 turns) remove screw and sring,washer and oring. If the oring and washer are stuck in the hole you will need a pic set and alot of pashence. Don't loose these or your bike won't idle right after.clean crabs with carb and choke cleaner and reassemble in reverse order. Hope this helps
P.S. turn mixture screws in all the way and back out same number of turns as you counted before.

Posted on Mar 03, 2010

  • 2702 Answers

SOURCE: honda xbr 500 carb backfire

it could have a burnt out inlet velve or it may be the velve clearence is to tight check velve clearence first

Posted on Mar 17, 2010

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