20 Most Recent 2003 Suzuki RM 125 - Page 3 Questions & Answers

Pull the slide out of the throat of the carb then move the clip at the top of the needle down one notch, two if needed. This will richen the low end fuel mix.

Need a "very helpful" rating asap. Thanks!

Yes.Hold the decom and give it 2-3 kicks.Release it and slowly kick it untill pressure builds up.Pull in the decom and move the kickstarter a very small amount to get the piston very close to t.d.c..Now,give it a full kick and at the same time release the decom.Hope this helps you

Hi and welcome to FixYa,

Initially, test for the presence / absence of below described voltages using an analog / needle type voltmeter when starting the bike:

• pulsating low AC voltage coming from the pickup coil;
• pulsating voltage feeding the ignition coil.

Good luck and thank you for asking FixYa.

sounds like you fouled out your spark plug, are you mixing your fuel/oil right? is your bike running rich?

If your confident of a good spark, then your issue is fuel delivery. Try raising the slide needle by going down one notch on the needle. Jets and needle seats should be cleaned in a good quality carburettor cleaning solvent. Jets should be replaced if suspect. Check condition of reeds. Is the airbox and filter in good condition. Check for leaks around inlet manifold. Goodluck, cheers!

Thats seems very low My CS125 scooter do 55 mph
Try clean carbs and do a chec on ignitiontiming
Do a compleat service with valve clearens
Good luck
Mike

You need to have stator coil tested.
An alternate problem could be the regulator/rectifier.
Both of these should tbe checked by a dealer

Cheers

Jon

Typically the whole pump is replaced, as there is commonly a bearing failure also...

if it turns on and you have to hold the trottle to keep it on.. you might just need a tune up. clean your air filter and make sure your carb is adjusted correct.

How are you testing for compression? This should be a 2 cycle 1 cylinder engine. Very simple. No valves.No compression is a mechanical problem and on this engine it could be a blown or missing head gasket or damaged piston and/or rings. Lack of maintenance on the air cleaner, no air cleaner, improper oil in injection system/ mix, no oil in former can all cause damage. More info needed.

did you check to see if it had spark with the kill switch unplugged?

Those little carbs on these tiny thumpers clog easily. You'll probably have to pull the carb, soak it in carb cleaner, blow it out with compressed air (be sure to wear chem-proof gloves and a face shield or at least eye protection--carb cleaner's nasty and when you blow it with compressed air, it goes everywhere). Reassemble, and it should run fine. We had a TTR125 and we had to clean the carb this way every year before riding season.

Depending on how large they are, they are most like from the oil lines that distribute oil to different parts of the bottom end of you motor. Also, they could be from around the oil pickup tube where it mates to the block.

Do a gearbox oil change. Then do another one 50 miles later. This should flush out the dirt and grit currently in the gearbox. You may want to invest in a new clutch cable also. 10w40 motor oil.

The theory is to replace tranny oil at regular service intervals, common for motocrossers. Compactness of waterpump and clutch leaves no room for a dipstick measure on filler plug and no room for a sight window. Drain and measure if you sense a leak, otherwise just replace with specified amount as required.
Cheers.

84 rm suzuki 125. when i push the clutch in it stays in and dont engage

it's prolly somthing electrical

The bike has a bent shift fork (or two). The engine needs to come out of the frame then gets torn down in order to replace the forks. Sorry.

Take the carb apart and clean out all the jets.

Cant think of any reason why I wouldnt besides the motor mounts. Just go to your local bike shop and ask them. Good Luck!!