Question about KTM 640 LC4 Motorcycles

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Cannot start with Button Engine tries to rotate but appears to disengage with a ratcheting sound. Tried a few batteries and had starter checked with new brushes fitted,Compression is 140psi My DVD manual is not clear on checks on starter system it mentions a freewheel but does not describe. HELP

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The ratcheting sound is the solenoid engagement. When you say you tried a few batteries, what exactly is meant by this?

Posted on Nov 24, 2010

  • tdog5066
    tdog5066 Mar 27, 2012

    my atk 604 had a simular problem. i had to pull the side case to acess the srag clutch. the spring that adjusted the tension. the sring screws together and as i couldnt find a replacment i unscrewed it, cut a quarter inch from the female end reasembled and has been working fine



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I have a 97 ford escort changed the battery and starter and all I get is a click. The engine doesn't turn. Could some one help

Just to be safe always check the obvious, make sure you can rotate the engine over with a socket/ratchet to be sure it is not seized, then check to be sure the hot wire to the solenoid ( big wire to stud on solenoid) has battery power with key in run position, check for battery power on the starter solenoid (small wire to activate solenoid) with the key turned to start the vehicle, , there should be power at the solenoid to engage the starter motor, if no power on the large wire trace back to find fault, same for the solenoid power from key, but from your statement of a click when trying to start sounds like solenoid is engaging . so either the power to the starter from battery seems to be open or to low voltage getting to starter from corroded wires, or the engine could be seized.

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2006 Suzuki Boulevard c50. Main 30 amp fuse blows as soon as the start button is hit.

sounds like the starter is shorted out or the bike was tried to start when battery was near dead and the starter is engagaed if starter is engagaed put it in gear and bump(push the bike ) it a few times forward and back this should disengage the starter if it still blows fuses the you may have a shorted windings in the starter and it will need to be rebuilt

Dec 01, 2014 | 2006 Suzuki Boulevard C50

1 Answer


Always very frustrating when you have an issue like this. Just to recap on my understanding what you have ruled out:
- not a battery issue as you have a car battery linked up!?
- not the starter motor as you have tried a second one!?
- rotation is only slightly better with the plugs removed ( trust this is all four? )
My suggestions would be:
1) remove all the plugs and with the bike in neutral, remove the timing cover at the crank and turn the crank clockwise and see how much resistance you get over a few full revolutions. Everything should move nice and easy, if it does not then there is something mechanically wrong in the engine.
2) when did you last change the oil and filter? I would suggest you do this to ensure you do not have a load of sludge in there which will certainly add lots of resistance when cranking a cold motor.
3) is it possible you are experiencing clutch drag? When cranking the bike pull the clutch in to ensure the clutch is truly disengaged and not dragging.
Try the above points and let me know how you get on.

Sep 02, 2013 | kawasaki ZZR 1100 Motorcycles

1 Answer

Starter motor does not engage,

ck. the starter drive. may need to be replaced.

Jun 25, 2013 | 2008 Yamaha XT250

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I still have problem starting My 2001 KTM LC4 supermoto.When I push starter button the engine tries to turn but starter disengages with a ratcheting sound. It did start once but after stoppiong it would...

Hello. I suspect that the actual cause of your troubles is old fuel. Read on. Whilst your bike was not operating for 3 months there has been no activity for the fuel... so, the fuel grows something like a moss or fungi in the tank... this is in the form of clogs, which is usually white for unleaded fuels.

So to make the engine to turnover again to start. All you need to do is, empty the fuel from the tank (Professionally or DIY) and fill it back up again with NEW FUEL.

Also get a can of starter fluid. IF the bike won't start with the new fuel, spray some starter fluid into the air intake and then crank it over. Keep it running with starter fluid if necessary for up to 5 minutes.

So when you leave your bike for an extended period of time (over 5 days) turn on the engine every 2nd day to clear out any white clogs, for only about 2 minutes.

And turn OFF the fuel switcher to prevent any fuel flow to the engine, which creates the white clogs.


Nov 14, 2010 | 2000 KTM 640 LC4

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BMW 318i 1988 2 door starting problem

it is your starter motor burnt out.need anew one.

Feb 27, 2009 | 1996 BMW 318

2 Answers

Siezed engine or not?

If it was Running good Prior to this it is the Starter.

Jan 22, 2009 | 1998 Isuzu Rodeo

1 Answer

Starting and general running

The fuel system should just run directly to the carbs through filters. The starter though, sounds as though the cannot turn the engine over. And if it was push started and didn't run.....then I would guess there are internal engine issues. That is just a worst case prognosis. There are a few options otherwise. Try a new starter. Make sure the battery is fully charged. If that bike uses a coil system then the battery has to have a charge in order for the coils to keep the bike running.

Dec 04, 2008 | 1989 Suzuki DR 750 S

1 Answer

Starting problem

so that seems fine. I did some research and I think it's either along the lines of the spark plug(or ignition area) or maybe water in the float bowls from fueling up(?). I tried it again today and this time there was no *click* sound. I also noticed that the -neutral- and -check engine oil- lights which normally light up quickly at start up take a few seconds before lighting up. Now I think it's more in the electrical section but not exactly sure which area. I'm going to take a look at the spark plug and maybe try to drain any water out but was wondering if anyone had any other ideas?When you press start, the churning sound you (typically) hear is from the starter motor forcibly turning the crankshaft. While the starter is physically turning the engine, the engine is also injecting the fuel/air mixture into the cylinders and firing the spark plugs. If the plugs successfully ignite the incoming fuel/air mixture, the engine will begin turning itself over. If you press the button and nothing happens, or you just hear a click, the starter motor is not cranking the engine. The click you heard was probably the starter solenoid attempting to engage the starter to the flywheel of the crankshaft. The problem is probably the starter. It may be a bad battery. Reading the open voltage with no load on the battery tells you nothing. Put the voltmeter across the battery terminals and read the voltage while holding the Start button. ,,,

Nov 10, 2008 | 1989 Laverda Atlas 600

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