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**** 250 idle adjust - 2005 Kymco Grand Dink 250

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How to adjust the carbuetor on a 2001 yamaha 250?


The idle air screw is on the side of carb. the high speed requires a special 90 degree screwdriver. This allows access to the high speed jet which is on the bottom of carb...Adjust idle screw till smooth idle is obtained. Adjust high speed while running to obtain the highest RPM.

Jul 17, 2014 | Mikuni Motorcycles

1 Answer

Idling speed


Hi, Anonymous the carburetor throttle shaft wheel has two cables the cable closest to the right side of the bike is the throttle cable and the one closest to the left side is the idle cable. Right about the middle between the two is the idle adjustment bolt it faces out towards the air filter end of the carb . The engine should be at operating temperature with the enrichener off to set the idle between 950-1050 rpm. Turn the idle adjustment bolt clockwise to increases idle speed and counterclockwise to decrease idle speed. If you have access to your air fuel mixture bolt you may adjust it as well if not there is a video below on how to gain access, make sure you start with clean or new spark plugs. Gently turn the air fuel mixture bolt clockwise until it starts to bottom out "STOP" do not over tighten as it will damage the taper on the end, now back it out 2 full turns to establish a starting point start the engine and check the idle rpm's and adjust the idle adjustment bolt accordingly for 950-1050 rpm if necessary, adjust the air fuel mixture bolt 1/4 turn at a time and let the engine settle for about 10 seconds, clockwise for a leaner mixture and counterclockwise for a richer mixture you are seeking the highest rpm your air fuel mixture bolt can acquire without going past 3 full turns from bottom then readjusting the idle adjustment bolt back down to 950-1050 rpm If you can not detect any rpm change and can not stall the engine by turning the air-fuel mixture bolt all the way in then your pilot/low-speed jet is too big. Final adjustment should be made with a clean air filter mounted to the carburetor. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
Yamaha ybr 125 idle ajustment
Adjust Engine Idle Ninja 250
Yamaha YBR250 2007 Service Manual Download Manuals Technical
OEM parts for Yamaha
YAMAHA YBR250 Owner Manual

Jun 21, 2014 | 2007 Yamaha yBR 250

1 Answer

My benelli velvet 250 is using to much fuel


Hi Anonymous and the usual suspects are:
1. Excessive enrichner use.
2. High-speed riding style.
3. Idle speed improperly adjusted.
4. Dirty air cleaner element (may also affect idle speed).
5. Vacuum piston assembly malfunction.
6. Excessive accelerator pump output.
7. Plugged or restricted bowl vent.
8. Fuel level too high.
9. Loose jets.
10. Worn or damaged needle or needle jet.
11. Enrichner valves not seated or leaking.
12. Plugged air jets or passages.
For more information about your issue please visit the websites below. Good luck and have a nice day.
Scooter Carburetor Idle Adjust
Vespa Air Filter Cleaning How to
How to rebuild your Chinese scooter carburetor
Benelli Velvet 250 Service Manual downloadallfileshere com
benelli velvet



Mar 04, 2013 | 2010 Benelli Velvet 250

1 Answer

!987 cbx250 will not idle when cold unless choke on all the time. Need to know where idle screw is to adjust


When sitting on your bike, Idle adjustment is on the RIGHT side of carb and will advance the idle setting as it is turned "Clockwise". Hope this helps you.

Aug 13, 2011 | 1987 Honda CBX 250

1 Answer

Where is the idle speed adjustment for the Daelim


on the carbaretor its a black plastic nut

Sep 03, 2010 | 2006 Daelim S2 250

1 Answer

1991 fzr 250 . timin chain noise at idle and just above idle. . runs great and no noise once the revs get up. . but how hard are they to adjust ??


They are very easy to adjust you will find the adjuster at the rear of the engine my advice to you would be to purchase a workshop manual for the machine it will give you step by step instruction with pictures wich will make the task at hand even easier

Mar 28, 2010 | 1987 Yamaha FZR 250

1 Answer

Won't idle especially when hot.


not real sure but you may be sucking air from a hose or loose manifold





















May 23, 2009 | 2001 Suzuki DR-Z 250

1 Answer

IDLE ON A BAYOU 250


clean all jets in carb.idle jet is a long jet with 6 to 8 holes no the side & 1 on the bottom.

Apr 23, 2009 | 2005 kawasaki KLR 250

1 Answer

Idle adjustment


your idle adjustment should be some where on the side of your bike, its usually a black cable with a black dial on the end of ot and should be attached to a metal cable/rod and bolted to another part of the bike

Mar 08, 2009 | 2005 Yamaha Xv 250 Virago S

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