The extensions on the forks are supposed to move the front wheel farther out for better stability. Actually pretty rare to find them from my point of view, i don't find those extensions too often!
The brake is normal, they had a hand and foot lever for the rear brake, just made it so you could use either. And its nice having both in my opinion.
As for the lever on the engine, thats the decompression lever, you flip that up and it stays up, that opens the exhaust valve so you can pull it over and get it spinning easier with the recoil, as it starts to turn over the decomp lever drops and resets on its own.
That looks more like a 200 motor than a 185 though, unless its a mish mash of two motors. Look at the cylinder base, see what is says for size, 192cm is a 200. Curious if that has a 200 top end on it or if its a 200 to start with. The 185's had a decomp that was actuated by a cable to the recoil, so when you pulled the recoil it automatically lifted it.
One suggestion... Remove the valve caps and clean all that damn RTV off there, the orange crap, get a couple new o-rings for the caps and put them back on. I hate when those get RTV'ed, just looks like heck. As for the rest of the RTV around the advancer cover and head, etc... If its not leaking leave it be and just take a wire brush and a pick and clean up all the excess to make it look nicer at least! LOL.. but on those caps i would definitely get rid of that, last thing you want is a chunk of RTV getting into the motor and starving it for oil circulation.
A hint for getting the carb off these... disconnect the fuel line and remove the tank, unscrew and remove the throttle slide and cable from the top of the carb, then remove the bolts from the rubber intake at the engine/head side, then loosen the hose clamp that fastens the back end to the airbox. Now you can just pull the carb off the airbox and take it off with the intake. Lots easier than removing the airbox. I can usually strip them off pretty fast that way. Make sure you replace the o-ring on the front of the carb and the front of the intake as well to prevent air leaks. Those two o-rings and the ones for the valve caps are easy enough to find a universal replacement at any auto parts store. I just take them in and compare to ones they have in their big assortment box.
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1984 Honda ATC200ES "Big Red"
1982 ATC200E "Hondie"
1988 TRX300FW "Project Quad" Still in progress....