Lockhart Phillips make all kinds of smaller turn signals. You just have to decide what you like. Any dealer worth the name should have a selection of those.
You must be riding much harder than I do to get your forks to flex. If you adjust the preload and damping, you can change the characteristics of the bike's behavior up to a point. Take a look at the thread about race settings for that information. If that doesn't work, then you belong in the AMA and probably need to have your forks professionally set up.
Over time, a little water or air can get absorbed into your brake fluid. The real fix is to change the fluid and bleed the brakes. In the mean time, you can pull your lever back to the grip, tie it there, and leave it that way overnight. That will harden up your brakes really well. If you are making your brakes fade, then you are using them very, very hard and you might want to experiment with other pads. I don't have any comments about what works, since I find the stock pads adequate for my purposes even on track days. Then again, I am a slow old man!
The engine trouble light will go off after three cycles. The oil light goes off if you have the right oil level and sufficient oil pressure. The engine trouble light is more of a caution light. The oil light means shut down the engine NOW! Where is the oil leak? It might not be that difficult to stop.
Hope this helps.