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Old 01-21-2013, 05:09 PM   #3883
Gnarly Adventurer
Joined: May 2009
Location: Iceland
Oddometer: 464
Originally Posted by Freddan View Post
I´m restoring a XT600Z 34L 1983. The spark is weak or seems to fire every 6-8 time of kicking. I have only rebuilt the ignition circut and have no battery or charging system. The two systems are fully independent as I understand. I had the bike running but it´s getting harder or impossible to start. So is this a bad wire connection, faulty CDI, Ignition coil measurs good. Pickup coil is a bit off the chart (110ohm and 110ohm both sides so I think it´s a measuing problem).

Has anyone had the spark come and go?

Assuming your XT has the same ignition as the “regular” xt600 of that era, and you have the original CDI box, chances are you have a faulty CDI unit.

Yes the ignition system is “stand alone”. 110 ohm is about right for the pickups. Disconnect the black/white wire from the CDI when testing, it is the “kill” wire. By disconnecting it you rule out a failure in the ignition switch, kill switch, wiring, etc
Check the Ignition coil, my XT550 has the same igniton:
Primary = 0,5 ohm plus/minus 15%
Secondary = 6K ohm plus/minus 15%

I have a CDI from in my XT550 (the original one died two years ago) ,it was plug and play, no problems so far.
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