Erm....
If you get stuck - ask for directions here..
http://www.guzzitech.com/
I had a quick scan of Guzziology. You probably have a motoplat ignition (known as the motosplat)
Check the pickup to reductor gap. If you don't have this 'right' you can get these weird harold symptoms. Also, the pickups are magnetic so tend to pick up all kindsa shit.
Early injected models have a pickup mounted in the engine case behind the r/h cylinder that senses 'bumps' on the flywheel. All model have a pickup over the cam/timng-shaft gear/sprocket.
Sometimes a bit of loose ferrous shite from the ring gear will stick to the pickup located under the r/h injector. Simply pull out the injector and clean it off...
Honestly, spend a few bucks on a copy of Guzziology.
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