Question about 2003 Suzuki RM 125

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Suzuki gp 125 1981 dont want to start

Hi i tryed the gas in the cylinder and the spark plug is new. dont know when last the bike was running.suzuki gp 125 1981

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Hi i have a suzuki gp 125 1984 its starts up but only on full choke and if you take the choke off, it bogs out, then cuts out. what could this be ?

Posted on Apr 22, 2011

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How is your solenoid starter does it give click sound when you try to start the bike?
How about your rectifier/regulator is is working properly?
Ignition cable are they all in good condition on both ends (boots covering the spark plug head and distributor)?
How good is your battery cranking power, have you checked?
If worst comes worst, have you tried squeeze the clutch lever, put in 2 or 3 gear, get it rolling and does it want to start (this called jump starting the bike)?
If this is good then give a good helpful response.

Posted on Jun 23, 2010

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  • Suzuki Master
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Make sure you have ignition spark and just wer yhe tip of the plug with gas. Puttting gas in the cylinder is too rich and will add to you problem. Good Luck

Posted on May 28, 2010

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1998 Suzuki VZ 800 Marauder running on one cylinder


Hi, Michelle you need "FIVE" things in order for a cylinder to run properly:
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Hi, Justin, you need "FIVE" things in order for a cylinder to run properly:
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2. SPARK: remove the spark plug and with it connected to the spark plug cable ground the threads to something metal you should see a bluish white spark if not you have a faulty spark plug, spark plug cable, ignition coil, condenser, CKP, ECM, sensor or the wiring in between.
3. COMPRESSION: you must have at least 80-100 PSI for most bikes, multi-cylinder engines should be within 10-15% of each other if not perform a leak down test you may have a burnt or bent valve or hole in the piston or broken rings.
4. CAM TIMING: confirm your timing marks are aligned to see if the cam chain or adjuster are worn out and the chain has skipped a couple teeth.
5. IGNITION TIMING: on older bikes check to see if your points have not closed up, timing plate has not become loose and confirm with a timing light for proper retard and advance functions, on newer bikes where timing is controlled by an ECM and is nonadjustable check you CKP, TPS, MAP, O2, sensor or its counterpart for integrity.
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Dec 20, 2017 | 1991 Suzuki GSF 400 Bandit

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Hi, Anonymous you need "FIVE" things in order for a cylinder to run properly:
1. FUEL: in order to validate your not getting fuel spray some starting fluid into the air cleaner and hit the starter button, if it fires up and runs for a few seconds then you know you have a fuel delivery issue. Multi carb banks should be bench "SYNC"
2. SPARK: remove the spark plug and with it connected to the spark plug cable ground the threads to something metal you should see a bluish white spark if not you have a faulty spark plug, spark plug cable, ignition coil, condenser, CKP, ECM, sensor or the wiring in between.
3. COMPRESSION: you must have at least 80-100 PSI for most bikes, multi-cylinder engines should be within 10-15% of each other if not perform a leak down test you may have a burnt or bent valve or hole in the piston or broken rings.
4. CAM TIMING: confirm your timing marks are aligned to see if the cam chain or adjuster are worn out and the chain has skipped a couple teeth.
5. IGNITION TIMING: on older bikes check to see if your points have not closed up, timing plate has not become loose and confirm with a timing light for proper retard and advance functions, on newer bikes where timing is controlled by an ECM and is nonadjustable check you CKP, TPS, MAP, O2, sensor or its counterpart for integrity.
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.
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1 Answer

1990 Suzuki GSX 600 F only running on 3 cylinders


Hi, Foxygirl309 you need "FIVE" things in order for a cylinder to run properly:
1. FUEL: in order to validate your not getting fuel spray some starting fluid into the air cleaner and hit the starter button, if it fires up and runs for a few seconds then you know you have a fuel delivery issue. Multi carb banks should be bench "SYNC"
2. SPARK: remove the spark plug and with it connected to the spark plug cable ground the threads to something metal you should see a bluish white spark if not you have a faulty spark plug, spark plug cable, ignition coil, condenser, CKP, ECM, sensor or the wiring in between.
3. COMPRESSION: you must have at least 80-100 PSI for most bikes, multi-cylinder engines should be within 10-15% of each other if not perform a leak down test you may have a burnt or bent valve or hole in the piston or broken rings.
4. CAM TIMING: confirm your timing marks are aligned to see if the cam chain or adjuster are worn out and the chain has skipped a couple teeth.
5. IGNITION TIMING: on older bikes check to see if your points have not closed up, timing plate has not become loose and confirm with a timing light for proper retard and advance functions, on newer bikes where timing is controlled by an ECM and is nonadjustable check you CKP, TPS, MAP, O2, sensor or its counterpart for integrity.
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.
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Oct 31, 2017 | 1990 Suzuki GSX 600 F (Katana)

1 Answer

Hi, I got a cold cylinder on a '91 Suzuki GSX R750cc, when sitting on the bike its the last cylinder to your right. I noticed it cause my idle was rough and started a light smoke with a strong gas smell....


1)You have two coils servicing four spark plugs. This is called the wasted spark system because the spark plug fires on the compression and exhaust stroke. Therefore on one of the coils , one spark plug is firing and the other is fouled. I would guess that you have a bad spark plug cap on that cylinder(about $25). Replace the spark plug cap and the spark plug and your problem should be solved.
2) You have low compression on that cylinder and need a rebuild.you may want to pull the plug and do a compression test.

Sep 10, 2010 | 1991 Suzuki GSX-R 750 M

1 Answer

Hard to start,new bike only 20 miles carb clean valves correct comp good great spark.all work done by factory suzuki tech. dealersphip stmppppped! new bike should run


If you have a good spark and fuel is getting to the cylinders ,check commpression .If compression is good ,Try rubbing pencil lead over plug points ,( This will give a greater spark ) or heat up plugs on gas ring till hot and replace quickly while plugs still hot ..Don't forget to wear gloves.Get a friend to help .and cut down the time of putting plugs back in engine .

Mar 16, 2010 | 2003 Suzuki DR-Z 250

1 Answer

Have a 1992 suzuki 125 rm bike cant get it to


try changing gas . dont forget to empty out carb bowl also check for spark might have a fouled spark plug .

Jan 03, 2010 | Suzuki RM 125 Motorcycles

1 Answer

Put new carb on 86 cr 80 ran fine 4 10 minutes then quit changed spark plug and gas still nothing. has spark dont know how hot also changed manifold appeared to be dry rotting still nothing. even attemped...


for any motorcycle to run you need three things. spark, fuel and compression. i see you've tried to get fuel and spark. if you have spark thats one down. dont pour fuel into cylinder. instead spray tiny bit of brakeclean or carb clean into spark plug hole. i have a feeling if you drained your gas after the carb clean the carb most likely sucked bad gas back up and might need cleaned again. ive seen it happen alot on ols bikes.

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My 98 Suzuki VL1500 has a weak spark to the rear cylinder. i've replaced plug, plug wire, coil, inition module, and stator. I've switched coils and plug wire from one cylinder to the other. The weak spark...


it is probably not a weak spark. if you are determing this because the plug is sooting up and fouling and or the bike is missing or just not running right. your carbs need rebuilt. know of same problem with friends bike. tried eveything. coils igniter etc.. check out g man industries.com give them a call they will explain what is going on with your bike

Jun 13, 2009 | 2001 Suzuki VL 1500 Intruder LC

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