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Author Topic: KTM 640 not starting. Help required.  (Read 867 times)

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Offline GreggB

Re: KTM 640 not starting. Help required.
« Reply #20 on: December 28, 2018, 04:03:58 pm »
thanks for the replies.

The bike sounds like it is firing (so not completely dead) but it just doesn't 'catch'.

will check the air filter option mentioned above.

Mate of mine had a similar problem. It turned out to be a pinhole in the fuel pump diaphragm that wasn't allowing the pump to deliver enough fuel to get it started keep it running. The pump works on vacuum so not much was happening with the hole.
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Offline cloudgazer

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Re: KTM 640 not starting. Help required.
« Reply #21 on: January 07, 2019, 10:04:32 am »
Hi

My nephew took a look at the bike while I was away.
He claims it is ignition related. No spark at all.
he tried multiple plugs with no luck. Also checked the wiring looms, but all seemed good.

Possible faults could be stator or CDI.

what do you all think?
 

Offline the_BOBNOB

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Re: KTM 640 not starting. Help required.
« Reply #22 on: January 07, 2019, 10:50:11 am »
Hi

My nephew took a look at the bike while I was away.
He claims it is ignition related. No spark at all.
he tried multiple plugs with no luck. Also checked the wiring looms, but all seemed good.

Possible faults could be stator or CDI.

what do you all think?

Test the stator - that is easy and quick with a multi-meter.

If it is the stator they are quick and easy to fix/rebuild vs a CDI that might be a very expensive replacement.
 

Offline the_BOBNOB

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Re: KTM 640 not starting. Help required.
« Reply #23 on: January 07, 2019, 10:53:24 am »
Looking at the stator on photos from Google I do not see any exciter coil - just standard stator coils.

So I would guess that the CDI is a DC type CDI and not AC fired - so you should see spark no matter what as the spark would come from the battery and not the stator - the stator will just recharge the battery and run the lights etc.
 

Offline AntonW

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Re: KTM 640 not starting. Help required.
« Reply #24 on: January 15, 2019, 04:00:00 pm »

can you kick start bike?

possible problems

check side stand and clutch safety
starter clutch
decompression "stepped washer"
stater motor brushes, replace with Honda, i think from CX 500
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Offline cloudgazer

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Re: KTM 640 not starting. Help required.
« Reply #25 on: January 21, 2019, 09:55:54 am »
quick update.

The bike is at KTM in CT, the issue is something to do with the stator. needs to be replaced.
Waiting on the part.
Hopefully get it this week.
 

Offline onderbroek

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Re: KTM 640 not starting. Help required.
« Reply #26 on: July 12, 2019, 01:01:06 pm »
Bike Starting yet?
 :sip:
hak vrystaat
 

Offline cloudgazer

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Re: KTM 640 not starting. Help required.
« Reply #27 on: July 16, 2019, 02:25:10 pm »
Bike Starting yet?
 :sip:

yeah.
It sat at KTM for almost 2 months while they waited for the part.
Running like a dream now.
 

Offline evansv

Re: KTM 640 not starting. Help required.
« Reply #28 on: July 17, 2019, 11:44:41 am »
What was the problem in the end?
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Offline cloudgazer

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Re: KTM 640 not starting. Help required.
« Reply #29 on: July 17, 2019, 03:59:07 pm »
What was the problem in the end?

something to do with the stator not firing - or something like that.
Not a major part, R900 or so - just a very long wait to get it.
 

Offline Dux

Re: KTM 640 not starting. Help required.
« Reply #30 on: July 18, 2019, 06:01:18 am »
For that price it must be the pickup coil
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