I fitted the Renthal High Bar....

I didn't drill them either, and the switchgear did move a little. Easily sorted with some gaffa tape (black) around the bars where the switch gear is located. With new bars you will need a little trial and error to get the levers where you want them, and not everyone is the same.

The vibrations, I find are increased with the Renthals, or maybe because I swapped the Yamaha OE handguards for Barkbusters at the same time, I don't know the cause, but it's not a problem for me so I've not bothered to investigate.

To fit the front sprocket, you just need to 'un-adjust' your chain to allow some movement, and you'll need a good breaker bar to crack the sprocket nut. Cracking the nut should be done before you move your chain, so you can use your rear brake to keep the (drive) nut solid.

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