Yep, also clean and lube the caliper pins with caliper grease; something is wrong with your brakes........not that I'm trying to talk you out of the swap but I'd hate for you to spend a bunch of time and money doing it when it was just a maintenance issue. Make sure you clean up your rotor as well and bed in the pads.I will start with a fluid swap and a stainless line to the rear and new pads as needed. I can't even lockup my rear tire in the dirt right now.
Are you thinking of a Tengai? They have twin piston front calipers.... the bike in the pic is definately a Gen1 with a Gen2 swingarm and related bits.Oh, yes, as to the apparent Frankenbike in the picture . . . maybe the component swaps mentioned by Tom were made. Yet, something in the back of mind tells me . . . the "almost" KLR650; has some kind of foreign name, had dual-caliper rear brakes . . . WHAT are those machines CALLED? (First, MEMORY goes, then . . . wha??? )