Question about 2005 Suzuki DR-Z 125 L

3 Answers

I have a 2002 suzuki drz 125L dirtbike and im having a hard time starting it. And once im able to start it when ever i give it gas it shuts off. The air filter is clean and so is the carb. Any one have ideas what could be wrong?

Posted by on


3 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 3 Answers

The carb on a DRZ 125 or KLX 125 comes pre-set from the factory with a very lean tuning. At first it may run well but once you get some time on it with a little build up and some dirt the lean setting gets even worse. To correct this you need to thoroughly clean the carb , specifically the fuel screw. Remove the carb from the intake and airbox rubbers and take off the slide cap. Drain the carb from all fuel. The fuel screw is in a recessed tube located on the bottom of the carb on the front side towards the cylinder. It may ahve a brass plug covering the screw. This is done at the factory to prevent tampering for emissions purposes. The plug can be removed by taking a very small drill bit 1/8" or so and very carefully drilling a hole in it. Put a small sheet metal screw in the hole and pull with pliers and it should come out. Make a note of the position of the screw and slowly turn it clockwise in to see what the setting is. Do not apply heavy pressure when you feel it getting tight stop. It is a soft brass screw with a fine point an is easy to damage. Typically the factory settings range from 1 1/2 to 2 turns out. This is way too lean for the bike to idle and run well or even start without the choke. back the screw out and remove the spring and O ring. Using carb cleaner with the hose attached insert it into the hole you just removed the crew from and spray it out. You should have a good stream of spray into the center bore of the carb. Re-insert the O ring and then the spring and fuel screw. turn it in until you feel it making contact and then note the position and back it out 3 1/2 turns. Put the carb back on and it should be able to start and run without the choke. Some bikes will still need a bit more tuning. The older carbs had a slide needle that had 3 to 5 positions on the needle that could be adjusted with the movable clip. Since this does not have that option you could go to a Yamaha dealer and buy the needle from a TTR 125 and install it as it is the same carb. This will cost you around $15.00. Or you could go to a hardware store and buy some 3/0 stainless washers and remove the needle and put 2 or 3 under it to shim the needle up just like the clip on an adjustable needle. You may spend $1.00 with this option. The bike should run better than new.

Posted on Oct 10, 2011

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Make sure you have a good spark plug and if thats not it since you hae the air filter and the carb clean, make sure the gas is not bad and gelled up

Posted on Jun 14, 2010

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert who has written 7 tips or uploaded 3 video tips

  • Expert
  • 267 Answers

Hmm, dirty or wrongly gapped sparkplug. Check the sparkplug heat range available from a plug retailers chart. Oversized main jet or choke remaining on. Timing should be stock unless motor has been dismantled at some stage.

Posted on Apr 24, 2010

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2005 drz 125L carb hose line diagram

Might be fuel leaking from overflow. Perhaps the float valve is stuck or damaged, allowing the float bowl to overfill. Slight chance tapping on side of carb may seat the valve. If not, it will probably have to either be set, or replaced. Could possibly have some "gunk" stuck in the valve seat from the cleaning. It only takes a tiny speck of debris to hold the valve open, causing flooding. Another possible cause is that during the cleaning, the tab that adjusts the level of the float valve got bumped, changing the level.

Apr 08, 2014 | 2005 Suzuki DR-Z 125

1 Answer

Bike backfire

clean exhust pipe.
is it 2 strok or 4 stroke engine?

Apr 06, 2014 | 2005 Suzuki DR-Z 125 L

1 Answer

What kind of transmission/gear oil do you put in on a 03 suzuki drz 125l

SAE 10w/40 semi or fully synthetic

Ride safe
Please mark this as very helpful (if it has been!!)

May 07, 2010 | 2003 Suzuki DR-Z 125 L

1 Answer


you need to dismantle it, cleaning kit needed and a air compressor / gas for washing. be familiarize everything when re-assembled.

Mar 26, 2010 | 2005 Suzuki DR-Z 125 L

2 Answers

Drz 400 sm starts but i cant give it any gas or it dies

Can you slowly increase the revs? It sounds like an accelerator pump or debris in the carb.

Jul 09, 2009 | 2007 Suzuki DR-Z 400 SM

3 Answers

Timing a 250 drz suzuki

I have a dr-z 250 suzuki and i replaced piston and rings. Dont know how to reset timing chain and cam gears. does eney body know how to set the timing on this bike.

Mar 25, 2009 | 2001 Suzuki DR-Z 250

3 Answers

I have a suzuki drz 125l 2004 model that currently has a ticking noise in engine. Bike runs well and has good power, but ticks one the less. Any ideas ?? I have mostly owned 2 strokes; therefore, I am...

This is nomal for a DRZ 125 because of the short piston skirt. You get much the same annoying sound on the 250/400's also, don't stress, thats just how it is.

Mar 04, 2009 | 2004 Suzuki DR-Z 125

Not finding what you are looking for?
2005 Suzuki DR-Z 125 L Logo

697 people viewed this question

Ask a Question

Usually answered in minutes!

Top Suzuki Experts


Level 3 Expert

78936 Answers

Arnie Burke
Arnie Burke

Level 3 Expert

4821 Answers


Level 2 Expert

83 Answers

Are you a Suzuki Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides