Well, you can hop down to your local Harbor Freight Tools (if you have one) and buy a remote starter for your car and attach it to the solenoid to see if it will cause the starter to turn over when you press the button. The kill switch wiring, don't recall if the off position grounds the coil or the run position allows it to connect, I think the former. If so, as long as those wires aren't connected you should be good to go.
The cruder method is to take a wrench or screwdriver you don't mind some arcing marks on and short across the solenoid terminals with the ignition on...
A section of 12 ga or 10 ga house wire could do the same thing...just don't get your fingers in the way to prevent electrical burns as you are going to be doing a little "welding" if not careful.
You can use right hand controls from other bikes that have 7/8" handlebars (most do) if you wish to change both sets to have the housing match, or don't mind a mismatch. The GL500 or CX500 handlebar controls work fine and are inexpensive on ebay...
