Having read through the posts on this really excellent forum, I found the repeated posts on the pickup wire fracture problem. Although my bike runs perfectly, I thought I would just have a little look at those wires and the bob-weight advance system, behind the pickup coil plate. Just to reassure myself.........
Guess what? Yep, two of the pickup coil wires had an internal fracture and the 'hourglass' shape when pulled slightly. Also, the mechanical advance was dry of any lubrication and had a slight covering of rust in places.
I spliced the wires (the other two shorter one are fine), cleaned up the advance and lubricated it where appropriate. I also renewed the bob-weight spring clips and also the spring clip which holds the arm from the vacuum advance onto the coil plate. They were corroded and possibly weakened, so worth doing. I think the two fractures hadn't yet caused an ignition problem but undoubtedly were well on the way to doing so.
So, thank you everyone who pointed out this fix. The quick repair has probably meant not breaking down somewhere remote or being left stranded at the side of the road!
Guess what? Yep, two of the pickup coil wires had an internal fracture and the 'hourglass' shape when pulled slightly. Also, the mechanical advance was dry of any lubrication and had a slight covering of rust in places.
I spliced the wires (the other two shorter one are fine), cleaned up the advance and lubricated it where appropriate. I also renewed the bob-weight spring clips and also the spring clip which holds the arm from the vacuum advance onto the coil plate. They were corroded and possibly weakened, so worth doing. I think the two fractures hadn't yet caused an ignition problem but undoubtedly were well on the way to doing so.
So, thank you everyone who pointed out this fix. The quick repair has probably meant not breaking down somewhere remote or being left stranded at the side of the road!
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