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Wobbly Dizzy Cap


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#1 imaparana

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Posted 07 August 2019 - 12:03 PM

Ive been trying to help a mate with getting his mini up and running.

Changed the leads and plugs and got it going after some faffing around.

 

However the dizzy cap wobbles like a mad man when its running, its like the rotor arm hits it when it spins, there is a lot of free play on the rotor which would explain it.

 

I have tried a different arm with no luck.

 

Does anyone know what would cause this? the other option as it stands is to replace the dizzy.

 

Cheers all.



#2 DeadSquare

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Posted 07 August 2019 - 12:50 PM

If you look in the dizzy cap, has the rotor arm been rubbing on the four H.T. contact points ?

 

The arm and the contacts should have a somewhat pitted burnt look.

 

It takes very little play in the dizzy shaft, before the four cams stop opening and closing the points, so is the play in the rotor arm, or in the shaft ?



#3 imaparana

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Posted 07 August 2019 - 01:03 PM

If you look in the dizzy cap, has the rotor arm been rubbing on the four H.T. contact points ?

 

The arm and the contacts should have a somewhat pitted burnt look.

 

It takes very little play in the dizzy shaft, before the four cams stop opening and closing the points, so is the play in the rotor arm, or in the shaft ?

Thanks for the reply, it has definitely been hitting the cap (new cap so no real burn marks)

The dizzy has been converted to electronic igniton aswell.



#4 DeadSquare

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Posted 07 August 2019 - 01:24 PM

If there is play in the shaft, and you shouldn't be able to feel the slightest play in a new dizzy, the play should be minimal, certainly not enough to let the rotor arm hit the cap.

 

If there is very little play in the shaft, one has to ask, has the correct rotor arm been fitted ?






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