I figured out a way to lock the Radrunner + up without modification. I am using:
OKG Maximum Lock Chain Hexagonal Heavy Duty Security Chain and Lock Bike Chain Motorcycle Chain 5 ft x 15/32 Inch
Kryptonite New York Lock Standard (STD) New-U Model With U-Bracket 9/10 Security
Hooked up the way I show allows for enough slack in the chain to go around a fixed object. No holes thru the wheel skirts. Hope this helps.