There's hardly any stopping power on the rear, this is especially true on larger machines. I've heard the rear brake called a "control brake" in the past. That's not a bad description. Point is, you should be getting used to applying different levels of bias to your different anchors for different conditions and speeds and course changes. Example: you should do all your braking coming into a corner. however if you've over cooked it, you can apply a little rear to slow the bike. Don't expect things to be drastic, but it could be the difference between seeing the other side of a hedge and not. alternatively, you do it wrong - over cook it - lock up your rear and your back end washes out. anyway - get into the habit of doing your braking before the turn. In normal conditions, your bias should be around 80% front, 20% rear. As been spoken about anything below walking pace should be done nearly entirely on the rear. you can tickle the front if you need to (i.e. it's not exclusively), however a motorcycle articulates at the front, you've seen a lorry jack knife, a bike will do the same! I've seen learners using their front brakes in traffic situations, and it looks snatchy and not smooth. It's quite refreshing not to have a counter steering or nodding thread!