Question about 2003 Suzuki RM 125
Not idling and not sure if fuel air mixture is properly set
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Posted on Jan 02, 2017
i'm not too familiar with dirtbikes but my experience with street bikes it has been on the underside of the carbs and if stock it is typically covered by a brass plug. this plug is just there to satisfy the epa you need to drill it out but be careful the screw is directly underneath the plug so as soon as you break thru pull back then use a screw to extract the plug. hope this is the answer you are looking for.
Posted on Jun 30, 2009
ALWAYS have a fire extinguisher on hand when working on carburetors. Drain the carburetor. There should be a plug on the bottom of the carb float bowl. Remove the plug then replace it after the fuel drains. Remove the carburetor from the engine.
Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the air screw on the outside throat of the carb and spray into the screw hole as well. Be sure to put the air screw back in. IMPORTANT > do not tighten this adjuster down. Only screw it in until it LIGHTLY seats. Now turn the air screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Let the float bowl fill then start the engine.
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Go to the site below where you can see a parts diagram for your specific bike. You will select the actual brand, year, model, etc., once you go to the site. Part numbers and prices are also shown. You can order parts from this site. In the event no price is shown on a particular part and/or the notation "Not Available" is in the description, the part is not in stock. www.babbittsonline.com/pages/parts/viewbybrandand/parts.aspx
Posted on Aug 17, 2009
hi,this might help,it is very difficult to get the adjustments right without a set of carb balance gauges,the adjustments are very small and critical to the running of the bike,borrow or buy a set of gauges,hook up the gauges,balance the left two cylinders together so they are both running exactly the same,then do the two right cylinders and get them both running the same,then match the two sets together using the balance screw between no2 and no3 cylinders,a general rule of thumb to get a startng point is to wind the mixture screws in untill they stop,then back them out about 1.5 turns,do the same to all four screws before you start trying to balance the carbs,make sure the bike is sitting vertical or on the centre stand because if it is not it will effect the balance of the carbs and also make sure you have a good airflow over the front of the motor for cooling as it will take half to three quarter of an hour to get the balance right...most bikes need the carbs rebalanced on a regular basis because when the parts of the carbs start to wear the balance will change,a good set of carb balance gauges is a worthwhile investment...hope this helps
Posted on Sep 12, 2009
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.
Posted on Dec 18, 2009
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