Maintenance & Technical > KX500 Aluminum Frame Conversion (AFC)
klx450/kx500
Motorrad:
Check system voltage under cranking. Starter my be pulling system down below operation threshold.
Which cdi are you using
My KTM has some very interesting starting quarks when it comes to voltage if your interested
Twosmokerfan:
Awesome job so far. I will have to get down that way and check it out. Perhaps early next year. You rock!
TSF
ylwgtr:
Motorad,the CDI circuit is totally independent to the starter circuit....the cdi does not require battery voltage at all to function...the loom is separated from the charging/cranking loom on the KTM
motopunk:
realy nice work, but it looks like an little electrical problem now... :|
1. is the engine running, if you kick it ??
2. i think maybe you only need isolation between the voltage of the e-start-system and the ignition-system , that the e-start-voltage can not bother the performance of the ignition-system, if you try to e-start the engine.
some years ago had one of my riding buddys the same problem with his ktm 300 exc, kickstarted it, runs... than try to e-start: no spark!!
kicked it again, sparked and was running with the same sparkplug.
he went with the bike to the local ktm-shop and they solved the problem with better isolation, that the voltage of the e-start-system cant touch the engine-cases and only works between battery and e-start-motor as an closed system, because the ignition also use the engine housing to work as an electric circle. any external voltage will bother it and the spark could be completely gone or simply not strong enough to ignite .
my idea is, that you should install an isolating gasket to the ignition cover and isolating washers between cover and bolts, that no e-start voltage could reach the ignition system...
... its worth a try !! :-D
sometimes is the problem much smaller as it looks in first... :wink:
ylwgtr:
hi motopunk....do you mean the ground is robbing the CDI ground?It kick starts fine....but when cranking with a spark plug in i got no spark(ive have a spare plug in the cap) whip out the lug in the engine which gives me more crank over speed(and unloads the starter motor) i got spark.....Having a fresh look at it today i thought id check the power to the CDI from the charge coil in the stator cover....i think i found something....during cranking i get 8.7 ac volts....plug out i get 11-12 ac.......so next i kick started it and tested the volts at idle....i got 10AC volts and climbing at revs....To me this means the operational voltage of the CDI is from 10 volts to say 50?so now i need to find out what the KTM300 has at crank....or force feed 10-20ac volts to the cdi from an auxillary power suple (a plug pack from a wall power for testing purposes,then i can rig some thing up onboard permenantly)
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