Question about 2008 KTM 450 SX-F

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Ktm 450 09 model Battery loosing charge after an hour ridding will not start on the button. Replaced battery still no good checked voltage when on bike under load it only shows 12.8v any help

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12.8 is a good voltage for a battery under load, but that depends on the load. The voltage with the engine running at about 3000 rpm should however be at least 13.8. If it is still 12.8 the alternator is not charging and you will need to get that checked out.

Posted on Mar 18, 2011

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The ignition button wont work


Hi, Ryan before testing any electrical component in the Starter Circuit it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test because your battery may have 12.5 volts or more but little or zero amps causing the battery to be faulty and must be replaced, especially "AGM" batteries.
1. Ignition Switch not in the "ON" position.
2. Engine Run Switch in the "OFF" position.
3. Check the battery terminals for damage or corrosion check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter.
4. Bank angle sensor needs a reset or is faulty.
5. FOB battery low or dead.
6. Faulty ignition switch.
7. Faulty starter button.
8. Faulty kickstand or clutch pull in switch/sensor.
9. Security alarm needs a reset.
10. Starter relay, solenoid or starter circuit wiring faulty.
11. Starter armature or field coils have failed.
12. Main fuse or circuit breaker may be blown or faulty.
13. The electric starter is working but starter clutch has failed.
14. Check for engine trouble codes.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Ktm Duke 125 Will Not Start
HELP Starting problem KTM Duke 125
http://www.ktm.com/globalassets/product-manuals-pim-data/dok_bike_bed_13_3211963_en_om__sen__aepi__v1.pdf
http://www.partsfish.com/page/oem-parts-for-ktm
http://www.motogelnar.cz/manual/KTM/KTM125-200_1999-2003ServiceManual.pdf

Apr 10, 2017 | KTM 2013 125 DUKE

2 Answers

640 adventure problem


Take the battery in to a vehicle battery specialist for checking. It will be a free service.
They will hook it up to a small machine that will load test it.
11.5V seems low to me.
If the battery is new it may still be dead and can be replaced under warranty. I had one go in 3 months and was replaced for free.

Sep 03, 2017 | Motorcycles

1 Answer

Kohler cv15s


Your battery may bad. Unhook it,check voltage, charge it 24 hours. Check voltage, should about 12 volts. Let set 24 hours, check voltage , if not 12 volts, no good.

Aug 20, 2013 | Craftsman Garden

1 Answer

Electric start not working. Bought new battery left it on charge over night. Kicks over fine but just wont start up. Have checked the battery with a multimeter holding charge no problem. Kick starts 1,2nd...


Thank you for contacting FixYa with your inquiry.
Thank you for contacting FixYa with your inquiry.
This is not an uncommon behavior and we need to locate the source of the problem and eliminate the things that are not effecting the issue.
Most probable causes: Battery, Starter Relay, Start Button, Starter.
Manually start the bike and take it for a good rip and see if the battery takes/holds a good charge for the rest of the day. If you don't have trouble starting through out the day then it's a good chance you may need to replace the battery. Recommend the use of a trickle charger to keep the charge up during the week when bikes in the garage. Part# 53 Frame Parts/Wiring Harness.http://cyclehuttktm.com/FicheFinderNew/FicheFinder.aspx
If your battery is known to be new or has a good charge, do you often hear a clicking sound. It might indicate your starter relay is wearing out or you have a short. Trace the wire harness and confirm insulation wear.Check starter wire and confirm the nut's tight with a good star washer. If relay - replace it. Part Number #58 Frame/Wiring Harness http://cyclehuttktm.com/FicheFinderNew/FicheFinder.aspx
If the battery is known good and the relay pulls in but the starter won't engage and you can hear it attempting you may have an issue with the starter being in a bind from some internal obstruction or just plain worn out. Pull it and check it. See if it engages off the frame. You may have to take it to an alternator shop and have it re-wound. New ones are spendy.http://cyclehuttktm.com/FicheFinderNew/FicheFinder.aspx
Starter Control Button: Reseat the connection and confirm it's engaging the relay. Part Number #69 chassis/Handlebar Controls. http://cyclehuttktm.com/FicheFinderNew/FicheFinder.aspx
Hope this helps you resolve your starting issue. If we can provide further assistance please advise,
Best regards,
TF

Jun 12, 2011 | KTM KING50 Motorcycles

1 Answer

2009 KTM 300 EXC will not start


Hi, Nickstar15 before testing any electrical component in the Starting System it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage, the battery is faulty and must be replaced. AGM type batteries fall into this scenario more so than lead-acid batteries.
1. Ignition Switch not in the "ON" position.
2. Engine Run Switch in the "OFF" position.
3. Check the battery terminals for damage or corrosion check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter.
4. Bank angle sensor needs a reset or is faulty.
5. FOB battery low or dead.
6. Faulty ignition switch.
7. Faulty starter button.
8. Faulty kickstand, clutch, neutral safety switch.
9. Security alarm needs a reset.
10. Starter relay, solenoid, starter motor or circuit wiring faulty.
11. Starter armature or field coils have failed.
12. Main fuse or circuit breaker may be blown or faulty.
13. Faulty ignition relay.
14. The electric starter is working but starter clutch has failed.
15. Check for engine trouble codes.
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.
KTM 300XC Electric Start
KTM 300 starter problems and solution
KTM 250 EXC EU Repair Manual
http://www.partsfish.com/page/oem-parts-for-ktm
KTM 125 EXC SIX DAYS Owner Manual

Oct 14, 2017 | 2009 KTM 300 EXC

1 Answer

2008 KTM 450 SFX not charging


Hi, Zarko before testing any electrical component in the Charging System it is "IMPERATIVE" that you have a fully charged battery of 12.5 volts or more and be able to pass a proper "LOAD" test if necessary, you may have a preliminary reading of 12.5 volts or more but little or zero amperage, the battery is faulty and must be replaced. AGM type batteries fall into this scenario more so than lead-acid batteries.
1. To check the regulator unplug it from the stator. Take a test light and clip it to the negative terminal of the battery and then touch first one pin and then the other on the plug that goes to the regulator. If you get even the slightest amount of light from the test light the regulator is toast.
To do this with a meter: black lead to battery ground, red lead to each pin on the plug, start with the voltage scale higher than 12vdc and move voltage scale down in steps for each pin. Any voltage is a bad regulator.
2. On the other part of the disconnected regulator plug. Set the multimeter for Ohms x1 scale and measure for resistance across the pins of the stator. You should read something around 0.1 to 0.2 ohms for a 32 amp system.
3. Then check for continuity between each pin on the plug and frame/engine ground. The meter needle should not move (infinite resistance)(digitals will show infinite resistance) if the meter needle does move (indicating continuity)(digitals will show some resistance), recheck very carefully. If the meter still shows continuity to ground the stator is shorted (bad).
4. Set the meter to read A/C volts higher than 30 volts (the scale setting for voltage should always be higher than the highest voltage you expect or you may fry the meter). Start the bike, and measure from one pin to the other on the plug (DO NOT cross the multimeter probes! - touch them to each other). You should read roughly 16-20 vac per 1,000 rpm.
5. If the battery was good under load test, if the stator is NOT shorted to ground, and the stator is putting out A/C voltage, then the regulator is bad (most likely even if passed step 2)
For more information about your question 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.
450 SXF weak charging system
KTM 450 EXC Charging problems
KTM 450 SX Repair Manual
https://www.partsfish.com/page/oem-parts-for-ktm
KTM 450 SX Owner Manual

Nov 01, 2017 | 2008 KTM 450 SMR

1 Answer

2001 Pt Cruiser. Car died, ran on battery, low lights. radio fade in and out then died. Replaced Altenator, did the same thing, mechanic said bad battery (battery replaced 2 mos ago) their shop showed bad...


have the alternator bench tested for faulty rectifier diode pack
it may be charging the correct voltage but it is AC voltage and not DC voltage
in which case the battery will die quickly
next to check is the voltage regulator
it has to be 4.5-14.8 volts DC and if it in the ECM unit , will require a new ECM to fix

Aug 26, 2017 | 2001 Chrysler PT Cruiser

1 Answer

Model 917.273372 will start-up on a fully charged new battery but after running for an hour or so will not start-up(no clicking sound)I checked the fuse & found it OK. Have to recharge the battery to...


When the engine is running check the voltage at the battery. It should be over 13VDC or the battery is not charging and will go flat. The battery is charged by a stator under the flywheel and either the stator or the magnets on the flywheel have gone bad. this can be checked with an electrical meter as well. Stator output should be 13 or 14VDC on the red wire the orange or brown wire is for the headlights. All voltage checks should be tested with the engine running at wide open throttle. If it checks out start tracing the wiring harness for loose plugs or broken wires.

Oct 09, 2010 | Craftsman 17.5 hp 42 in. Deck Lawn Tractor...

1 Answer

My ktm duke had a low battery i fitted a new one and the ignition worked fine but now it dose nothing but bike kick starts


Check your stator and voltage regulator for proper output. Sounds like the battery isn't receiving a charge through the system. You can charge the battery with a trickle charger to verify the battery will take a charge outside the bikes charging system.

Sep 18, 2009 | 2001 KTM 640 Duke 2

1 Answer

I have a 1995 kawa. ninja zx-6, i bought a new battery and junction box for it. i took the new junction box off because the head light would not turn off, so it is running w the old box and the new...


Hi and welcome to FixYa,

Your description indicates that the battery is not charging when the engine is running. This could be:
  • faulty regulator;
  • loose/corroded connector/terminals at the regulator;
  • loose wire/terminal from the regulator to the battery + terminal;
  • loose battery ground to chassis/harness;
  • loose ground from regulator.
Check and correct based on the above.

Good luck and thank you for using FixYa.

Feb 23, 2009 | 2001 KTM Supermoto 125

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