As long as you are well away from the central belt, as others have said your bike will be fine. Obviously you want to be clear of busier areas like Fort William and Inverness etc.
But if you want to go somewhere remote, then there is no prob parking your bike and leaving it, just be sensible where you park it, ie so it doesn't cause an obstruction. You can park it up, walk off and pick it up a week later if you want.
And if you do head off, don't forget to leave word with somebody roughly where you are heading and when they can expect to hear from you again. If you are going remote you probably won't get a mobile phone signal. Leave them details of your reg number and where roughly it will be parked.
Just give a bit of thought to where you are heading, make sure are prepared and you can navigate confidently. A few folks have gone wild camping or using bothies in the last year and didn't return. In a couple of cases it was a few months before their bodies were located. One of these sad incidents was in an area I know quite well. Makes you think.
Another consideration is midge, and at the moment even worse than that are the clegs. Never mind wild camping, which I've never or have yet to get into, but as a hill walker I haven't been up any hills since the begining of June, firstly due to some very warm weather, secondly the clegs are out in force and trying to eat folks alive. Popped up my local hill and fought them all the way up and all the way back down - foc that, it was miserable.
But with luck things might improve over the next few weeks.