Could be just broken or a wiring problem however if it is behaving erraticly be carefull as this often happens when the regulator/rectifier is on the way out.
The standard yam part is not up to the job and the next part to go will almost certainly be the cdi unit if you leave it.
An aftermarket heavy duty reg/rec is available for about 40 quid.
For more info have a look on the supertenere forum you need to register to view.
http://supertenere.proboards20.com/index.cgi
Yup will run with one tap open no probs, is it running rich?
Throttle needles and tubes are often worn out after 15-20 thousand miles.
Supertenere forum has plenty of info on this.
http://supertenere.proboards20.com/index.cgi
These headlights are crap as standard.
Are you registered on www.supertenere.proboards20.com ?
Here is a link to headlamps upgrades but you need to be registered to view it.
http://supertenere.proboards20.com/index.c...0905&page=1
Rob.