Question about 2003 Suzuki RM 125
My rm 125 has an oil leak behind front sprocket. Also, the transmission oil is a milky color. Is this serious and will it cost much to fix? @
Hi, Chops_1 for this scenario you will need your service manual that has all fastener torque specs and a wiring diagram on the back pages, parts fiche, and owners manual if you can't find the best tool you ever bought for your Suzuki, despair not, for a mere zero $0 you can download another one.
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06 RM125 leaky countershaft seal
Replace Your Counter Shaft seal
Suzuki RM125 Owner Service Manual
Posted on Nov 12, 2018
Use 10w40 motor oil in the gear box. Don't use any synthetic oils, oil marked "EC", or oil with "special" additives. Stick with the major brands; Pennzoil, Quaker State, Mobil or Shell.
Use TWO STROKE ENGINE OIL in the pump. If not using an automatic oil pump, then mix the gas and oil 32 to 1. That equals 4 ounces of TWO STROKE ENGINE OIL to one gallon of gas. NEVER use motor oil in the gas. Only two stroke engine oil.
The lack of power probably has nothing to do with the clutch. More than likely you need new crank seals and possibly new crankshaft bearings. New piston rings are a possibility also. Remove the left side cover so yo can grab hold of the flywheel. Lift the flywheel up and down then left and right. If the flywheel is not rock solid you need new bearings. If you have to replace the bearings, also replace the sprocket shaft bearing and seal while you are inside the engine. For parts , 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
Cleaning the carb jets may help with the power problem also.
ALWAYS have a fire extinguisher on hand when working on carburetors. Drain the carburetor. There should be a large plug on the bottom of the float bowl. Remove the screw 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 idle screw and the air screw on the outside throat of the carb and spray into the screw holes as well.
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Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two adjusters down. Only screw these in until they LIGHTLY seat. Now turn each adjuster one and one half turns outward. Before putting the slide back in the throat of the carb, move the clip on the jet needle one notch lower. 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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Posted on Aug 22, 2009
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