I drilled my bars. I don't think you have to, but it's not as hard of a job as it sounds. Under the switches for the lights on the left and the starter on the right there's a little plastic peg. They sit in the hole in the bar so that they don't slide around. Some bikes use this as a ground, but not ours, it's just plastic so I suppose you could file it off. Once I got my new bar mounted I put every thing back on without tightening the switches then stuck a little screw driver under the peg to scratch a mark where i wanted to drill. Just used a regular cordless drill, started slow and then add some pressure. Easy peasy.