Question about 2003 Suzuki RM 125

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My 2003 Suzuki rm 125 kick starts with brand new spark plug then eventually bogs down and dies, does the same when push started, does it need new piston and rings?

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  • ronniec_1 Mar 23, 2011

    I run 32:1 and I did clean the carb still does it though

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HI,,sounds like your plug is fouling,,what pre-mix ratio are you running? and has the carb been played with? run 32-1 premix and remove and clean the carb.

piston and rings are not to blame for this behaviour.

Posted on Mar 23, 2011

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1 Answer

Having problems with my 1998 suzuki RM 125


The plug you need is an NGK R6918B-9. they aren't cheap. I would think this may be the problem. 2 strokes rely on the correct bits to keep them running smoothly. Spark plugs are more important on 2 strokes than 4 strokes due to the oil in the fuel/air mixture.

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I need help with my rm 125 1995 it has a perfect spark iv cleaned the carb and it don't start but wen I take the spark plug out then I kick it then screw the spark plug back in the kick it it nearly...


the way you explain this, the fuel and air mix is wrong, is the spark plug wet, if it is check the carb air mix screw. remove the mix screw and use a can of air and blow it out. before doing this remove the air filter and the spark plug then spray some wd (brand name) in hole and do again with the air can. then screw back in. leave the air filter off. and put spark plug back in and start the engine you will need to adjust the screw until you can get it to start. when it does give it a few good revs and keep it running for a bit. replace the filter and start engine and you will need to adjust the air screw till the engine sounds right again.

Feb 01, 2018 | 2003 Suzuki RM 125

1 Answer

2001 rm 250 boggs and dies when it warms up


Hi, Anonymous and the usual suspects are:
1. Faulty ignition coil.
2. Faulty spark plug cables.
3. Faulty temperature sensor.
4. HISS light not going off.
5. Faulty starter motor.
6. Valves adjusted too tight.
7. Spark plug gap too wide.
8. Fuel has vapor lock.
For more information about your issue and valuable "FREE" downloads that you will need for viewing or printing please click on the blue links below. Good luck and have a wonderful day.
2002 yz250 idles fine but bogs and tries to die when twisting the throttle...
2000 RM 125 Bike wont stay running
Suzuki RM250 Owner Service Manual
https://www.partsfish.com/page/oem-parts-for-suzuki
http://mybikemanuals.com/suzuki

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/gregg_c0ec1df182c7330e

Dec 23, 2017 | 2003 Suzuki RM 250

1 Answer

1993 suzuki rm 125 has no spark?


best spark plug is iridium plug, takes the heat and lasts alot more rides. could be flooded, take plug out , stick finger over hole , kick start till it drys out. take match stick and clean inside of plug, should be good. otherwise probably a fuel problem.

Nov 07, 2009 | 2003 Suzuki RM 125

1 Answer

2003 suzuki rm 85 wont start cleaned carburetor,


if it has reed valves, check them for either cracked or broken pedals. also try starting it with the air filter removed. also make sure the choke is operating properly

Oct 22, 2009 | 2003 Suzuki RM 125

3 Answers

How do i set my suzuki rm 125 carb to the right setting and does any 1 know what the setting should be please thanks graham


Turn the air screw and throttle screw all the way inward. 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. The carb is now set back to factory specs assuming no one has changed out the main jet or played with the float level..

Please rate this solution. Thanks!

Jul 18, 2009 | 2003 Suzuki RM 125

1 Answer

1987 rm 125 starts and idols fine, bogs out on take off!!!!


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!

Jun 15, 2009 | 2003 Suzuki RM 125

1 Answer

No spark


check compression

Apr 13, 2009 | 2003 Suzuki RM 125

2 Answers

2003 Suzuki RM 125 with no power band.


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!

Apr 03, 2009 | 2003 Suzuki RM 125

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