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Why does my bike have a rough idle when in first gear and bogs out when i gun it

Already checked for vacum leaks cleaned carb completly changed gas choke is open

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  • Contributor
  • 41 Answers

Put in new accelerator pump off of Holley 780 double pumper, will run just great

Posted on Jul 04, 2013

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

rockitman187
  • 2559 Answers

SOURCE: Bogging and stalling at high RPM's

The main jet need cleaning.(you should clean them all though)

Main Jet: Main jet comes into play at three-quarters open to full throttle conditions. CRITICAL to high-speed engine operation. Not only does it meter the gas into the engine, it can aid in cooling the engine as well.

Please rate this Fixya

Posted on Jan 29, 2009

  • 53 Answers

SOURCE: rebuilt carbs-starts and idles but wont rev up without choke on

sounds like the main jets are partly pluged, you must remve all brass jets and seats including needle jet and its slide soak in carb cleaner and blow out with compressed air only.. hold up to bright light to verify if all are clean. jim

Posted on Mar 29, 2009

cape cod bob
  • 292 Answers

SOURCE: bike runs at Idle but dies when given gas

have you changed the fuel filter? you are not getting enough gas, are jets squeaky clean? there is a good fuel system cleaner in the USA called Berrymans B12. put some in the tank warm up bike then let it stand overnight and see what happens. if still no luck repeat process. if you still have same problem then get new fuel filter

good luck

Posted on Apr 02, 2009

  • 3567 Answers

SOURCE: XR 70. Idles fine. Won't throttle up just dies. Changed Plug, gas, cleaned carb...what am I missing

ALWAYS have a fire extinguisher at hand when working on carburetors.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the
carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. 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. Before putting the slides back in the throat of the carbs, move the clip on the jet needle one notch lower. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road.

Please rate this solution. Thanks!

Posted on May 08, 2009

rockitman187
  • 2559 Answers

SOURCE: XR 100 didnt move for a year.My bad so i cleaned

First Make sure you have all new fresh gas,and new fuel filter,Then check the intake tube between the head and carb for cracks or leaks,And You'll need to go back through the carb again as this is a carb issue,But without doing the above first,a clean carb won't be clean for long.

Posted on May 17, 2009

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If a 2 stroke dirt bike wont idle and the jets are clean what could be wrong


If it is older bike the reeds in the carb could be bad or going. Might what to check out the choke also.

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I have a 1999 suzuki gsxr I sync the carbs and changed the spark plugs I started my bike and idle fine put in to 1st gear and the bike starting spuddering every time I put a load every gear it would...


If the motorcycle has sat more than 6 months with reformulated gas, it more likely has jets plugged up and will need a carb cleaning. Plug jets will cause sputtering and bogging down when the engine is loaded.

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Hello, I recently purchased a 1973 Suzuki TS 185. The bike turns over and starts right up very easily. When the bike idles I can rev it and it seems to work very well in first and second gear. However,...


Check for air leaks. You probably need new crank seals and a new intake manifold. Check your reed valves if you have them and do not hold the throttle wide open if it is bogging you will score the cylinder by running it lean.

Oct 06, 2010 | Suzuki TS 185 Motorcycles

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Drz400e had bad gas in the bike. Changed the gas and cleaned the jets. The bike idles rough and when i throttle up it dies.


Sounds like its still starving for gas.I would check the fuel petcock if that`s working fine I would reclean the carb. Hope this helps
D.

Sep 26, 2010 | 2007 Suzuki DR-Z 400 SM

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My Magna idles well. Carbs are clean and pretty


Before you go changing jets make sure your factory air screw setting was not changed and has the correct amount of turns out from seated position. Second check for intake leaks at the carburetor joints/manifolds
( with the bike running spray WD40 around the carb joints and if the engine changes rpm's there is an intake leak replace carb joint,gaskets or o-rings depending on your model.

May 09, 2010 | 1996 Honda V-Twin Magna

2 Answers

How to clean carb on yz125?


ALWAYS have a fire extinguisher on hand when working on carburetors.
Remove the water trap bowl at the bottom of the petcock, (gas valve). Is there any water or trash in the bowl? Drain a cup of gas from the tank. Is there any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a large plug on the bottom of the carb float bowl. Remove the plug then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the idle screw and the air screw on the outside throat of the
carb and spray into the screw holes as well.
< < READ CLOSELY > >
Be sure to put these two screws back in the same hole they came out of. 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. Put the rest of the
carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine. This process should get you back on the road. Post a comment to get back to me if it doesn't.

A “very helpful” rating for this answer? Thanks

Jun 16, 2009 | 2003 Yamaha YZ 125

1 Answer

Carbs cleaned but bike will not idle properly


The pilot jet controls the idle. Check your service manual for the jet location. Chances are the jet is plugged up by varnish. Count the number of turns as you turn the adjuster screw INWARD until it LIGHTLY seats. Now remove the adjuster screw. Clean the jet and then put the adjuster screw in and LIGHTLY seat it. Turn the adjuster out the same number of turns as originally counted. Don't seat the screw too tight because you can screw up the jet if you do. Remove the actual jet only if you must.

Please rate this answer. Thanks Shawn! Good descriptions :)

May 02, 2009 | 2001 Honda VT 600 C Shadow

1 Answer

Bogs down at 25 30 mph 1st gear 45 in 2nd gear


  • Check to see that the choke is not partially on.
  • Drain the carbs and clean them with B12 chemtool or any other good carb cleaner. The main jets in the carbs are probably gummed up. To clean the carbs properly they will need to be removed from the bike. Be sure to balance and synchronize the carbs when reinstalling.
  • Remove and clean the petcock water trap and clean the trap of water and rust etc. If a filter screen is present clean it as well.
  • Set idle speed to factory specs. Do not use gas with Ethanol.
This should fix the bog problem.

Mar 17, 2009 | 2002 Yamaha Road Star Silverado

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83 toyota p.u. 4x4 running rough.


I think you must have the carburettor plunger not going well as you are getting flat spots under sudden acceleration, I think the best way to go is to get the carburettor overhauled.

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