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Do A4's have a rough patch?

Need help restoring, building, or finding then try here.

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Pigford
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#16 PostAuthor: Pigford » Mon Jul 13, 2015 1:06 pm

I'd check theres a good + 12v at coils when running :!:
And on the 7th day... Zeds were created!
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Wayne1960
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Location: Kent England

#17 PostAuthor: Wayne1960 » Sun Oct 18, 2015 10:07 pm

what does "main jet should be in middle position mean"?
Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.
Bike now finished what a joy!
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sprint
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Location: Eastbourne

#18 PostAuthor: sprint » Mon Oct 19, 2015 8:46 am

Pigford wrote:I'd check theres a good + 12v at coils when running :!:


Low speed problem was ultimately traced to low voltage to coils.

By chance found that the main fuse was very hot on one side, enough to melt the plastic holder. On investigation I had 12V on one side of the fuse and 10V on the other due to a high resistance joint. At the coils it was only about 8V.

Cleaned fuse contact and then 12V each side but still only around 10V at the coils and about 10.8V with engine running. Made up and fitted 12V relay mod and now full battery voltage at coils. Low speed problem resolved.

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Last edited by sprint on Mon Oct 19, 2015 8:56 am, edited 1 time in total.
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sprint
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#19 PostAuthor: sprint » Mon Oct 19, 2015 8:54 am

Wayne1960 wrote:what does "main jet should be in middle position mean"? Just purchased a 1976 UK Z900 A4 for renovation. Wish me luck.



My UK Z900 A4 now restored.

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