Some time soon I will be giving my front brakes an overhaul (cylinder replacement, new res bowl, cap, O-ring, etc) this was prompted by a slight leak coming from under the brake fluid reservoir cup, which subsquently dropped onto my cylinder head and strip the silver paint off, arrgh!!! (can you use standard paint for the head or do you have to use high temp paint?).
In the interim I have been trying to fix this leak, but can someone tell me how you are supposed to get the bowl off. It will spin around and around quite happily and I can lever it up slightly but it will not leave go of the housing.
It does however (touch wood) look like I have managed to fix the leak for now, I'll find out later when I go down to the garage at work. I just cleaned everything up and put a bit of sealant on the base, then turned it back in place.
I'm guessing the reason for the leak is the O-ring beneath the bowl. If I can ever get to see it.
Keep prying the reservoir away from the MC base and it will pop off. Depending upon the condition of the O-ring, you may be able to reuse it but you must carefully inspect and clean the ports (one large and one tiny) in the bottom of the MC bowl. In most cases, the tiny fluid return vent hole will be clogged. I snipped off a steel bristle from a wire brush to open it up. Also, clean out the groove where the O-ring fits and apply a bit of silicone grease to it to ease reinsertion. This worked well for me. I had to replace the O-ring. It was available from Honda for about $5.00.