Hotwire midimoto 4wire Key Barrel (2orange,1black,1black&white)?

Ive Snaped the key inside the lock & tryed everywhere local for a replacment barrel (no Luck) I was Told Hotwiring would Be the best as is not a road legal bike But Im told to match up the 2 colour's (orange im gessin) & bob's My uncle But Dont Want to do this & it mess Another item along the wiring loom up .. Or Wondering If i can totaly miss the wiring loom out & use the engine As it is thanks So im Asking for help