
Welcome:waving:Barnstormer
Thank you Mike!Hello Barnstormer and Welcome Unless you have a maintenance histroy with the bike I would surely spend the few hrs to replace the timing belts . Its good for peace of mind when your talking about a 35 year old bike ( belts ) . You can get Gates belts from an auto parts store , dont need to get them from Mother Honda . MMM number Gates T274 , read thru this link : Goldwing Tips Also check this link if you havent already found/used it :Randakk's .
As for your alternator wires , look under the left side cover for 3 yellow wires . If unmolested they should be at the forward edge of the battery . They will have a white plug connector where the engine Alt wires connect to the chassis harness . The actuall plug may be inside a rubber booty sort of bell shpped if I recall correctly . They cut out the plug connector and soldier the 3 wires together . No need to worry about which goes where . Just yellow to yellow , engine side to harness side . Not sure about with a sidecar but a bare 1000 should get near 40mpg i believe .
If you have sorted out the brakes , carbs installed new tires it should be ready for 500 mile days after the timing belts are replaced .
About the belts ...this is an interference fit engine . If a belt brakes , your in for a lot of work . Possibly bent valves damaged heads and or piston . Its worth the price of belts . There are tutorials here for changing them as well . Read the totorial several times to to be sure you understand them . Come ask us questions . Be sure to turn the engine over 4-6 6imes by hand , with plugs out to be sure it turns easily and the marks line up after your work .
Now you can enjoy taking the Pup out for long rides . Enjoy the breeze .
BTW what size if the BMW ? R50 maybe ? I would have thought it should do highway speed .