Question about Suzuki RM 125 Motorcycles

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I have a suzuki rm 80 1984 X and my new cdi unit has plug with 3 wires and 3 single wires and i was wandering where the wire with the looped connector is fitted to (rm 125 is the only model i could find on the list it is an 80)

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Posted on Jan 02, 2017

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SOURCE: no spark cold on rm 125

could be stator or the coil or cdi box

Posted on May 14, 2009

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SOURCE: 2003 Suzuki rm 125 repair manual

here you go buddy,



Posted on Jul 23, 2009

  • 440 Answers


First, try the cable adjustment at the lever end, if no more movement re-adjust inwards, then adjust at the clutch end.
If no joy, then it is either the lifter mechanism or the clutch its self.
Ride Safe

Please mark this as useful (if it has been!!)

Posted on Aug 03, 2009

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SOURCE: i am restoring a 1984 suzuki rm 125, i took the

The piston arrow always points to the exhaust port. The rings are pinned to keep them from turning. the pins are in the bottom of the ring groove and need to be there. New rings should be ( fitted )to the cylinder as the Cylinder is bound to be worn and the ring should be tested square in the cylinder in many of the places that can be in its strock The ring too tight as the gap is listed in the repair manuel .010 is close. if it measures near or over .015 you may want to ( fit ) the next larger over size grinding the end off to get the gap ( just right ) remember too back cut the gap where the location pin fits or it'll bind and blow. Doing this wrong can make the engine run only a few seconds and it's over new cylinder piston rings upper bearing all gaskets and worse the rod bust too, pull the cylinder studs right out of the case. Totalled. Don't set it too tight and on first run if it seems too tight it is tear it back down and do it again or you might not to get to work on it again as it'll full trash. Too lean, or open pipes that haven't been ( jetted for ) still too lean will blow it and overheat and lock it. The old story it run best right before it blew. I've raced and blown alot of racing engines and all of these things happened more than once. Getting in a hurry and saying ( that i'll be good enough ) are the famous last words

Posted on Aug 12, 2009

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SOURCE: I just bought a 1984 suzuki rm 250, this is my


Posted on Aug 25, 2009

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How do i test my cdi unit

try change your spark plug first in case it is not your cdi unit.

Feb 21, 2015 | 2003 Suzuki RM 250

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My suzuki vitara 20v6 number one plug is not

its a 2.0L V6 called the h20 engine
in some countries, this engine uses a coil pack with 1 coil per
2 cylinders, this magic is called Wasted spark.
some have 3 coil packs for 6 cylinders
others have 1 huge pack with 3 coils inside.
what you have , im totally clueless, (no country stated, dig?)

but no matter, the pack is bad, or the wire that is FINE, is not FINE
no human on earth can test a HV wire, no body.! ( 1 out of 4 sure)
that is fact, (sure if opened) but what about the other modal failiures.
1: insulation breakdown.
2: resistance wrong, (say too high)
3: intermittent.
4: dead open, anyone can test this, its a no brainer. if ever.

this fact is why the 60k mile tune up, will fix it. new wires.
new HV wire set, I run NGK MAG wires, they last 2x longer.

no only that. with wasted spark , the other plug in the loop can cause your dead plug to be dead. and its wires too.
that is because it is a LOOP

if both plugs are new and both wires are new
then the coil is bad.
coil packs are usually way more expensive that $2.49 spark plugs
or $20 wires.

Aug 27, 2014 | Suzuki Vitara Cars & Trucks

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1981 Suzuki gn400 no spark

I know it sounds silly, but have you checked your earth or ground wiring. If not earthed this type of problem can occur. Did the bike run before you replaced your coil etc? You could have a crook CDI
are you using multi meter mate for correct voltage readings?

Feb 09, 2014 | Suzuki Motorcycles

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My Suzuki GS 550 L wont start

check the cdi box i think thats your problem if so buy a dyna s 3 for it works great on mine

Sep 13, 2012 | 1982 Suzuki Gs 550 L

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I have a 1987 rm 125 h need help on the wiring out of the magneto to the cdi box i dont have a plug on the mags wires the colors are black with a red stripe, green ,red , and re with white stripe the cdi...

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.

Jul 30, 2010 | 2003 Suzuki RM 125

1 Answer

Detonation damage to cylinder head

Detonation is normally caused by compression being too high for the particular fuel you are using.
Try using a higher octane fuel, and see if it still detonates. I am not sure what octane fuel you are running, but use the highest available, or else try a mix of racing fuel and highest octane pump gas available. I seriously doubt your problem is electrical.

Apr 22, 2010 | 2003 Suzuki RM 125

1 Answer

No spark put on a new cdi box coil good and a new stater

hi,sounds to me like your cdi pickup unit has failed,i am not 100% certain but this will be located on the end of the crankshaft behind one of the enginecovers,there could be two other possibilities,motox bikes are notorious for breaking wires so check the wiring from the cdi sender unit to the cdi box and the coil,also check your "off"button it may be stuck in the "kill" position..hope this helps..cheers ian

Dec 26, 2009 | Suzuki RM 125 Motorcycles

1 Answer

O3 rm 125 has no spark

check simple things first like, spark plug,try a new one or the plug cap,a bad earth frame connection in relation to the ignition system,cdi unit earth,ecu frame earth etc, etc 1. check the kill switch. 2.check the resistances in the high tension coil. Primary around 0.6 ohm, secondary around 15~20k ohms. 3 . check the output source coil , black/red~ red/white it should carry about 20~ 28 ohms with an output of around 30 volts. 4. last but not least check the pulse coil. red~ green 85~ 115 0hms.Glad to help Red.

Nov 21, 2009 | 2003 Suzuki RM 125

1 Answer

New Top End back together and No Spark, Didn't remove any wires.

is it in the run position?? Check everything! new plug? put your finger on it for the pain check?
Pin it to win it Jeff! Good luck!

Aug 03, 2009 | 2003 Suzuki RM 125

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