One Spark At Plug And Then None

99 XR400

440 kit, Hot Cam, Mikuni

Testing the ignition spark after changing out a stator as part of the electric start installation.

I have installed the CDI that came with the kit

I pulled the spark plug cap

Inserted a new Iridium plug

Held the plug to the cooling fins

Turned it over with the electric start

I get one spark and then nothing

Repeat and same result

Help and suggestions would be appreciated

Try a different plug.

get someone with a slight lack of brains to hold the plug against the head, probably with a pair of pliers.

get someone with a slight lack of brains to hold the plug against the head, probably with a pair of pliers.

that person was me

I donned a pair of leather gloves and held the plug cap to ground the plug to the cylinder fins

Sounds like the capacitors in the CDI have failed, borrow one of a mates if possible and try it.

(After trying a new plug.)

actually, do u still have the original CDI? if you do, try that. beats admitting to ur buds you've got bike problems.

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