CRANKSHAFT NUT ON MY GILERA RUNNER SP50 -2007. KEEPS WORKING LOOSE

Your coil problem, change with the new one.

check your speedometer cable. It's either loose or broke.

Easy!
Just remove the exhaust muffler and remove the CENTER NUT of the rear wheel!

check for a loose wire on the relay or battery, or selionid

if the horn and the indicators are on the same handlebar maybe it is a problem with the operation there?

why is my gilera bogging out when i drvie it on the flat

Has it been laid up for months? Did you leave any gas in it untreated? You may need to boil out the gas tank . Try a carb cleaner first that you add to the gas.Check the plugs.Are they black/oily (too rich / worn ring), Tan ( correct ).they tell a lot about the condition of the engine. Good Luck

you went through the electric. system, now check fuel supply filter, tank, valve carb bowl for dirt