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Pp. 338pt does not throttle up correctly

How to adjustment carb

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How do I adjust the throttle to run correctly?


clean carb or rebuild carb or buy a new carb for 10 bucks on ebay,ethanol kills carbs

May 19, 2015 | Garden

2 Answers

Just fitted a new carb to my gilera runner 50cc and now it revs really high on idle


I would check a few things. First off make sure the throttle cable is adjusted correctly. Second, try opening the throttle half way and letting go you should hear the inside parts of the carb click as they seat. Third, find the idle adjuster screw turn this anti clockwise and see if the idle speed drops down. Fourth check the choke mechanism is working properly choke/cold start forces a rich mixture to the engine and increases the idle revs.
it is worth checking the pilot air screw is adjusted correctly. Hope this helps.

Mar 04, 2015 | Gilera Motorcycles

2 Answers

Cleaned carbs on 1989 Radian 600, now idles at 6-8K RPM. Please help.


Please check the following:
- Throttle control cable adjustment.
- Foreign matter in throttle plate.
- Fuel line clogged.
- Water contamination in fuel.
- Vacuum leaks in the intake manifold or at the carburetor.
- Carburetor base gasket or seal.
- Air/ fuel mixture adjustment.
- PCV valve.
- Valve clearance.

May 08, 2014 | 1989 Yamaha YX 600 Radian

1 Answer

How do you lower the idle on a 2004 cr125?


There should be a screw in the carb body turning this in raises the tick over turning out lowers it normally. Check the throttle cable[s] adjuster is set correctly. Also check that the throttle action is free running if the cable is not well lubed this can prevent the carb slide from seating at the proper level inside the carb. Some bike have adjusters on the carb top make sure this is not keeping the slide from seating. If you get somewhere fairly quiet open the throttle about half way and let go you should hear a metallic clink as the slide seats on the stop.

Aug 01, 2012 | 2004 Honda CR 125 R

1 Answer

Just replaced the carb, fuel lines, filter and gasket that goes between the carb and cylinder wall. All brand new parts. I believe lines are connected correctly. Now the engine runs like it is on full...


I don't think it has anything to do with the high/low settings, but in case was the carb pre adjusted or did you adjust them yourself. Did you put the throttle cable in the right hole on the throttle plate if there is more than one. Check the idle speed screw (not the low needle) to make sure it is not causing this. Look to make sure the throttle butterfly is not binding in the open position or that the throttle cable itself is the culprit. Maybe your gasket moved when re-installing causing plate to stay open. I suggest removing carb and inspecting for any of these problems. Maybe there is something wrong with your new carb! I hope this helps out. Happy to answer any questions.

Dec 03, 2010 | Craftsman 25cc Gas Line Trimmer

1 Answer

Throttle linkage wont reach new 4brl carb


Noadjustments can be made.Order the correct cables as needed through any GMparts dealership

Jun 05, 2010 | Chevrolet Impala Cars & Trucks

1 Answer

I know its a stupid qeustion but where exactly on the motorcycle is the air screw and throttle screw. I have a 2007 Suzuki rm125.


The air mixture needle valve is on the Carb. Throttle screw as you call it, you might be referring to 1- throttle adjustment at the twist throttle hand grip. 2- At the top of the carb is a throttle cable adjustment 3- some times somewhere between the twist grip and the carb there is an adjustment.4- there is also a idle adjustment at the carb.3a37cbb.png

Dec 18, 2009 | 2003 Suzuki RM 125

1 Answer

8hp Tecumseh engine how to adjust carb. when I put throttle on high it sputters drop the throttle back down its okay?


These symptoms indicate a rich mixture. Assuming the carb is the original (and therefore correct) one, and that it has an adjustable main jet, turn in the main jet adjustment screw on the bottom of the float bowl until the engine runs smooth.

If there is no adjustment on the float bowl, the carb will have to be removed and properly cleaned (ultrasonic cleaner recommended).

Oct 01, 2009 | Tecumseh Lawn Boy Push Mowers Insight...

1 Answer

Idles at full throttle


Be sure the throttle cable is routed correctly and is not being stretched. When disconnected from the carb, does the inner throttle cable operate freely? Lubricate it. Also check that the cable connections at throttle and carb are seated properly. Does the slide move up and down freely? Remove the air filter and twist the throttle while looking inside the throat of the carb. LIGHTLY seat the throttle screw and the air screw then open each of them one and one half turns outward.

Aug 02, 2009 | 2002 Honda CR 250 R

1 Answer

Replaced throttle cable on pw50 but can't seem to get it adjusted


If I understand your problem correctly this may help. There should be a spring just a bit smaller diameter than the slide that mounts between the top of the slide and the bottom of the carb cap. No spring means no snap-back. I am assuming there are no kinks in the cable and the cable was routed correctly when installed. Lots of times if the cable is not routed properly the gas tank will "stretch" the cable when the tank is re-mounted. Route the cable properly and the problem goes away..... As far as the slack in the cable, there is a an adjusting screw on the top of the carb (where the cable ends) and an adjuster screw at the hand throttle also where the cable ends. Some bikes have an extra adjuster mid cable but I don't think yours does, (working from memory here). If none of the above work then my guess is that the parts counter handed you the wrong part.

Mar 14, 2009 | 2000 Yamaha DT 125 R

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