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2003 Suzuki DR-Z 125 Questions & Answers
Have drz125 cleaned carb an
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.
I have a 2003 Suzuki drz 125. and when i got it it
You stated that you "left it alone for a while"....if that is longer than a year, theres a few things that can happen here. Sounds like your pilot jets (idle jets) are plugged up and your float is sticking open. You should probably clean the carbs quick and see if that helps.
Otherwise another problem could just be that your Idle adjustment is set wrong. There should be a knob off to one side of the carb towards the bottom, usually has a black plastic or white plastic knob thing molded to it so you can change the idle by hand. But again, I'm pretty sure its your pilot jets plugged up.
I'll attach a picture of a carb for you to help. This is NOT your carb it is actually off a 1974 TX500, and the configuration is a little off, but it should help you a little bit. The pilot on yours is going to be about where I circled it in the picture (on this picture the pilot is actually under the black thing between the two I circled) but this should still help. The smaller one will most likely be plugged up. Goodluck!
Bruno
Hi, I have a 2003 DRZ 125L (I'm a girl) that I put
Jenny, I admire a girl willing to tackle a motorcycle. The problem is the float not fully closing or not closing at all. Remove the
carb then remove the float bowl. this will expose the float chamber. Remove the 1" long pin that the float is hinged on then check the float by shaking it. It should be light as a feather and have only air inside it. If anything but air is inside it you need to replace it. More likely is a bit of lint or rust from the gas tank is preventing the float needle from closing. Clean the
carb with spray
carb cleaner. Don't mess with throttle or air screw settings. clean the float pin then re-install it. It would be a good idea to install an in-line fuel filter when you get a chance. If you want to see an exploded view of the
carb ( and the rest of the bike ) go to the website below. Please rate my answer. Thanks.
www.babbittsonline.com/pages/parts/viewbybrand/default.aspx
I have a Suzuki DRZ 125L and for some reason there
Always turn the fuel petcock off when your not riding the bike.The cocks leak and the fuel flows through the carb. through the intake, into the cylinder, past the rings and into the crank. This is possible death to your top end. The fuel washes away the oil on the cylinder wall !
I would do an oil change then let the bike run for a little while then do another oil change.This will help get the fuel out of the crank.Then another change after your next ride.I would even put a little extra oil with your fuel mix to help lube that cylinder and maybe smootout the idle. Dont run the bike to hard for a while,let the oil clean up the cylinder.(I hope) You may have scorched the piston and cylinder walls with the fuel in the oil.
I cannot get the bike to idle on it's own
Take the carburetor off the bike and take the bowl off and blow the jets out. Make sure all the tiny holes are open. This is the best guess with the limited information.
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