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 1972 BSA Lightning A65 Zener Diode Location
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craigt6449

18 Posts

Posted - 07/14/2009 :  08:02:00  Show Profile  Reply with Quote
The zener diode for this bike is just laying in compartment with battery. Can someone tell me where this should be mounted. Thanks

f scott dundas

Australia
253 Posts

Posted - 07/14/2009 :  21:38:27  Show Profile  Reply with Quote
THe zener on a 72 Lightning is attached to the inside side cover.From memory if you take off the left hand outer cover there is a hole in front of the air cleaner element used for fixing the zener. The actual zener sits on the outside of the inside cover and the fixing nut and washer sit in the air cleaner side. Be careful tightning the fixing nut as it only takes around 2 foot pounds of torque. so not much more than finger tight.Overtightening will cause a straight short to earth.
Scott
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f scott dundas

Australia
253 Posts

Posted - 07/15/2009 :  19:22:19  Show Profile  Reply with Quote
One other thing - make sure that there is a good contact between the base of the zenner and the inner side cover by removing any paint from the cover.
Scott
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