Join Date: Aug 2015
Location: Derbyshire, England
I've just been through a similar experience. I bought a 2004 Wee with 32K miles and no service history.
I've just checked the valves, one is near the lower limit but I'll do a few more K before tackling it.
I found that the electrical connectors attached to the plastic radiator shroud showed varying levels of verdigris and indeed my horn had stopped working due to a bad connection. So I disconnected and dismounted all the connectors, cleaned them out with contact spray and then pumped them full of ACF50 before finally applying a liberal coating of petroleum jelly and reassembling them.
The connectors carrying the most current were more corroded, so the worst was the connector for the left switchgear, which controls the headlights. It was then that I realised that the ignition switch connector was missing altogether, a PO had obviously had trouble and the wiring from the switch is now connected directly into the loom with the joint properly heatshrinked for protection. Of course, the ignition switch carries the most current so I suppose that connector would be the first to rot out.
Whilst I'd got the ACF50 in my hand I liberally coated the STVA mechanism and throttle bodies with it.