I am posting this here because it takes days to get an answer in the 250 forum and I need this bike fixed by tommorrow. I am at my boiling point with my bike I have spent 15 hours fixing it and 1 hour riding it. It is a 2002 Suzuki DRZ-250 and gave me alot of trouble starting. I ran some old gas through in the first place which was my mistake. After that I cleaned the carb 8-10 times (literally). Getting it to occasionally start but it won't stay running for an extended period of time. I then couldn't get it started at all. I blew compressed air in the jets and that got it started again. However, it will not take any throttle. Touch the throttle and the bike turns off. In addition after running poorly for 3-4 minutes it turned off and will only crank when I try to start it. I can't take this shit anymore! Ideas?:banghead:
Suzuki DRZ starts but won't take throttle?
Started by b18cyaaa, Sep 24 2009 12:44 PM
22 replies to this topic
Posted 24 September 2009 - 12:44 PM
I am posting this here because it takes days to get an answer in the 250 forum and I need this bike fixed by tommorrow. I am at my boiling point with my bike I have spent 15 hours fixing it and 1 hour riding it. It is a 2002 Suzuki DRZ-250 and gave me alot of trouble starting. I ran some old gas through in the first place which was my mistake. After that I cleaned the carb 8-10 times (literally). Getting it to occasionally start but it won't stay running for an extended period of time. I then couldn't get it started at all. I blew compressed air in the jets and that got it started again. However, it will not take any throttle. Touch the throttle and the bike turns off. In addition after running poorly for 3-4 minutes it turned off and will only crank when I try to start it. I can't take this shit anymore! Ideas?:banghead:
Posted 24 September 2009 - 01:55 PM
are you sure that's it? How would that get ruined? Should I replace both jets while I'm at it? Other ideas?
Posted 24 September 2009 - 02:31 PM
Had similar problem. Found needle dislodged. (CV) from main jet. Easy to check, just pull carb top. Maybe comp air pushed it up to far.
Posted 24 September 2009 - 03:01 PM
Replace the pilot jet and while you in there maybe the main too. Its about $4 maybe 10 if you go to a highend place.
As for other ideas, they will all start with did you replace the pilot...
As for other ideas, they will all start with did you replace the pilot...
Posted 24 September 2009 - 05:28 PM
Whit001 said:
Had similar problem. Found needle dislodged. (CV) from main jet. Easy to check, just pull carb top. Maybe comp air pushed it up to far.
Kman- Ok I'll buy the new pilot/main jets tommorrow.
Whit001- I take the top brass piece off the carb to find this needle and then I am looking for what? I will grab the diagram off here.
Posted 30 September 2009 - 05:03 PM
what is #22 set at? i dont know what factory is but usually about 2.5 turns out. When you cleaned the carb did you pull this out and clean that passage as well.
My first guess is that your pilot screw is turned all the way in. Typically when bikes wont take any throttle like that its due to the pilot circuit. How did you clean out the pilot jet(#26)?
My first guess is that your pilot screw is turned all the way in. Typically when bikes wont take any throttle like that its due to the pilot circuit. How did you clean out the pilot jet(#26)?
Posted 30 September 2009 - 05:05 PM
also the problem whit was talking about is on a cv carb. you do not have a cv carb. When you turn your throttle #5 goes up along with the needle that lets fuel pass through the main jet. On a CV carb the needle/slide is raised due to a vacuum created by the venturi effect.
Posted 30 September 2009 - 06:38 PM
shift- I didn't touch number 22. I should remove this and clean it as I would #26?
I cleaned #26 and screwed it in until it stopped turning. Should I not turn it until it is secure?
Eddie is the needle #17? I haven't opened up the top.
Also, the plastic piece that wraps around the main jet has become a little loose. Could this be effecting it?
I cleaned #26 and screwed it in until it stopped turning. Should I not turn it until it is secure?
Eddie is the needle #17? I haven't opened up the top.
Also, the plastic piece that wraps around the main jet has become a little loose. Could this be effecting it?
Posted 30 September 2009 - 08:55 PM
The pilot jet & screw are mainly for the idle circuit. The needle comes in to effect from 1/4 to 3/4 throttle. the main jet flow is regulated by the needle tapper. The main jet comes in to operation at 3/4 too full throttle. Is the needle attached, If a CV cab dose the throttle vale (slide or thing the needle attches to) moving up and down, it dose this as vacum increases when opeing the throttle, check it. The diaphragm may be torn. This all happened after you put in old bad gas? Take the cab back apart clean with a good cab cleaner like gumout, (keep it away from the diaphragm) spray the carb cleaner in all passages forward & backwards then blow compressed air in to all passages. The needle is not moving or some geld gas is pluging the circuit, O some carbs have a bleed pipe or needle jet holder that the main jet scerws in to make sure it's all clean!
Posted 01 October 2009 - 03:33 AM
junure, that is the case with a cv carb but the mechanical jet overlap is a little different since there is a direct mechanical connection between the slide and throttle.
b18, the pilot fuel screw is a pointed needle(no holes in it) that blocks the air passage from the opening of the carb down to your pilot jet. This screw regulates your low end fuel mixture. There is an idle circuit(for no throttle), a pilot circuit and a main circuit( so to speak). When you remove this pilot screw first you want to turn it in all the way clockwise making note of how many turns. THAT IS IMPORTANT so you can put it back to factory settings.
When you said you cleaned the carb 8-10 times but you didnt remove the top or the pilot screw, what did you clean? just the two jets? How did you clean it? did you soak the carb assembled?
b18, the pilot fuel screw is a pointed needle(no holes in it) that blocks the air passage from the opening of the carb down to your pilot jet. This screw regulates your low end fuel mixture. There is an idle circuit(for no throttle), a pilot circuit and a main circuit( so to speak). When you remove this pilot screw first you want to turn it in all the way clockwise making note of how many turns. THAT IS IMPORTANT so you can put it back to factory settings.
When you said you cleaned the carb 8-10 times but you didnt remove the top or the pilot screw, what did you clean? just the two jets? How did you clean it? did you soak the carb assembled?
Posted 01 October 2009 - 10:15 AM
I cleaned the two jets. I took the main and pilot jets off spraying them down with carb cleaner. I sprayed carb cleaner up the passages. your saying I need to remove the pilot screw #22 and spray carb cleaner up the passage then replace the pilot screw turning it in a specific number of times? Or is the pilot screw up top?
Posted 01 October 2009 - 11:49 AM
My guess is that you have cleaned it but not properly...
You will have missed something.
Also, check all vacum pipes, fuel flow etc... Check for spark too, you never know what you could of pulled, knocked etc while getting the carb on and off 10 times ;)
You will have missed something.
Also, check all vacum pipes, fuel flow etc... Check for spark too, you never know what you could of pulled, knocked etc while getting the carb on and off 10 times ;)
Posted 01 October 2009 - 02:17 PM
b18cyaaa said:
I cleaned the two jets. I took the main and pilot jets off spraying them down with carb cleaner. I sprayed carb cleaner up the passages. your saying I need to remove the pilot screw #22 and spray carb cleaner up the passage then replace the pilot screw turning it in a specific number of times? Or is the pilot screw up top?
To properly clean a carb and all the little passages it all needs to come apart. The pilot circuit is usually the culprit because the passages are smaller and get gummed up first. The pilot screw is on the bottom of the carb. The top of the carb will have your slide or piston(depends on what you call in) in this case its a slide which has your needle. This needle rides up/down and changes the amount of fuel that can come through the main jet.
Posted 01 October 2009 - 03:14 PM
If you aint got a high pressure airline, its very hard to clean a carb thoroughly....
Posted 01 October 2009 - 03:15 PM
I replaced the spark plug and it is getting fuel properly. I will clean the pilot screw tonight and post results.
Posted 01 October 2009 - 04:22 PM
Cleaned pilot screw passage and it does the same thing. It will idle for about 5-10 minutes and will not take throttle. After this period of time I have to spray the pilot/main jets with compressed air to get it to start up again. I have used a whole can of carb cleaner on these passages I can't imagine it is still dirty. Remember this ran fine till I pumped a bunch of old gas through that made it smoke like wild. It has fresh gas, new spark, cleaned the pilot/main/ jets pilot screw passage. It idles then dies............
