Hi guys how do i fix a front brake lever rattle?

Can't be certain but the levers have a small plastic bush insert. They can fail, so pop out your lever and replace the bush. Add a touch of grease. If not the bush then it could be the mount but that's pretty unlikely unless you've had an off or whacked it. 

Yes the brake lever has an anti rattle plastic shim. Check it out.

Dealer should have them.

Put a new plastic anti-rattle saddle in as well as a new Teflon and pivot pin and C clip. Polish the lever and it's back to new. There's under $30 worth of parts in the job...

Wicked thanks guys