20 Most Recent 2003 Suzuki RM 125 - Page 8 Questions & Answers


2003 Suzuki RM... | Answered on Oct 17, 2010

Try another spark plug.
Also, make sure you have a clean air filter, and good compression.
If all is well and it runs rich, (Plug burns black) You need to go smaller on the jetting.
Your plug should burn chocolate brown in color. Run it at an idle for 10 minutes, then remove the plug...white is too lean, (Needs bigger pilot jet) and black is too rich. (Needs smaller pilot jet)
Now run it 3/4 throttle (Riding it) for around 10 minutes, and shut it off and check the plug again. This works the same, but for your main jet. Note... this is for two strokes.

2003 Suzuki RM... | Answered on Oct 12, 2010

Use 10w40 motor oil. NEVER use synthetics or oils with "Special" lubricant additives. They can mess up the cork on the clutch plates.

2003 Suzuki RM... | Answered on Sep 29, 2010

You have to split the crank.It has to be pressed apart. Then press back together.Hope this helps

2003 Suzuki RM... | Answered on Sep 28, 2010

yes, you need a special tool to split the casses and a tool to remove and install the crank...

2003 Suzuki RM... | Answered on Sep 12, 2010

could be a few different things,But always start with the small( inexpensive )first and work your way up...#1 check your clutch cable adjustment to be sure its engaging and disengaging properly(clutch cables stretch over time and need replaced or adjusted)...but if you have never done any clutch work to the bike(and you ride it like i do mine) #2. it probably needs new clutch plates and #3 maybe clutch basket from your description of the problem. the clutch plate fibers wear down over time(they are like brake pads and wear out).and the plates wear groves in the clutch basket and interfear with the plate movement...hopefully its just your cable..hope this helps..

2003 Suzuki RM... | Answered on Sep 12, 2010

I am not personally familiar with a 1975 DT250, but here is a general overview. If the bike is a 4 stroke, the oil you observed could have been from the exhaust, however it is more likely that it is from a leaky valve cover gasket or a head gasket. If the bike is a 2 stroke, the "oil" is from the exhaust (expansion chamber). It is excess 2 stroke oil that accumulates. You should reduce the mix to 32:1 or even 40:1 and replace the oring gasket in the opening of the pipe. If in a pinch you can use high temp silicone, but not a good way to go.
best wishes!

2003 Suzuki RM... | Answered on Sep 09, 2010

Scatter gun approach > thoughts to check out > > >
Clean and dry the air filter? Go back to a stock main jet, at least to check things out? Are "O" ring seals on the main jet going bad?Partial internal collapse in exhaust (remove exhaust pipe & do a quick run down the alley), Install a new stock NGK spark plug, Be sure battery connections are clean and tight, Be sure intake manifold and carb are good and tight.

Hope this helps!

2003 Suzuki RM... | Answered on Aug 31, 2010

Is just flat black and yellow ....nuthing fancy from factory that year

2003 Suzuki RM... | Answered on Aug 27, 2010

Lightly seat the screws then open up each of them one and one half turns. This is the factory setting.

2003 Suzuki RM... | Answered on Aug 11, 2010

That is a hard question to answer. A stock 1988 will not beat a 2010. If you have motor work done and suspension set up right it might run with a new one. The technology is far superior in the new bikes. A stock new motor is far more powerful than an old bike. The suspension is where you will get alot of your speed also. The new stock suspensions are darn near race ready with minimal tweeking.

2003 Suzuki RM... | Answered on Aug 11, 2010

You can run Motor Oil in the Tranny or we run Automatic Transmission Oil in ours and we change it alot. We also run Lucas 2 Stroke Oil at 40:1. We run our Banshee and Yamaha Dirt Bikes on that also. Hope this helps.

2003 Suzuki RM... | Answered on Aug 11, 2010

"alpha sports" on the web have all suzuki parts for all suzuki bikes

2003 Suzuki RM... | Answered on Aug 10, 2010

If you are talking about a 2003 RM125, it shouldn't reach 100k/ph, or 65 m/ph. But, ...
make sure the air filter is clean, your premix is 32:1, and do a compression test.
Finally, make sure the power valve is working, or you wont get that "top" end power.

2003 Suzuki RM... | Answered on Aug 10, 2010

There is no adjustment on the stator. I am not clear about the clutch problem. Colud you go into more detail on the problem? Don't re-post the problem, just reply.


2003 Suzuki RM... | Answered on Aug 05, 2010

Try moving the clip on the jet needle downward one or two notches. This will richen the midrange mixture and lessen the bog. Remove the top of the carb for access to the jet needle and clip.


2003 Suzuki RM... | Answered on Aug 04, 2010

Hmm, something has been changed at some stage.
All wires should be of same colour combo's.

Best guess is three wires from cdi go directly to magneto, whilst the fourth is for the coil. However your configuration suggest a different cdi unit is being used, the site below has a diagram of your bikes standard electrics, unfortunately not color coded.

Normally, it cannot be wired incorrectly as male/female and color wires determine correct connections. Find out the origins of the parts and seek the application for the color of each wire, ie: color wire for primary source, pulse coil, earth, etc. Transfer this info to the colors from your magneto, Goodluck and cheers.


2003 Suzuki RM... | Answered on Jul 31, 2010

I have been down this path and found out the dimensions of axles are not actually documented outside of the makers factory. I got my specs by asking a seller on ebay to take all of the axles measurements for me....it's one way at least, Cheers.

2003 Suzuki RM... | Answered on Jul 25, 2010

Bummer on the gears. The best I can suggest, other than taking a box of parts to a Suzuki dealer, is to go to www.babbittsonline.com/pages/parts/viewbybrand/default.aspx
to see a parts diagram of your gearbox. Match what you have with the diagram and you should be okay. Be sure to install new crank bearings and seals while you have it apart.

2003 Suzuki RM... | Answered on Jul 16, 2010

on top yoke,remove large nuts,bottom yoke,release pinch bolts and legs should slide out

2003 Suzuki RM... | Answered on Jul 03, 2010

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