If you have limited experience a couple of really important things right up front:
1 if you dont have a torque wrench then do not work on the bike (ie change the oil) until you get one. Its unbelievably easy to strip out the oil drain plug, the spark plug threads in the heads, the little bolts that hold the oil filter cover in... and it will cause you incredible grief if you strip any of them.
2 the factory service manual for the 650 is available online from a couple websites as a free PDF download
3 if you are thinking of changing those intake boots, even just because they look bad, then wait till you do the next valve adjustment. You will have to strip the tank, intake box, and carbs off the bike for both, and it takes about 2 hours the first time you do it.
To get the oil drain plug off you can get a 6 or 12 point 3/8" drive socket on it, just barely, and then an extension to put a ratchet wrench on it. Put the wrench on and hold it tight counter clockwise, then tap the wrench with a hammer to shock/break the plug loose. As soon as you get one turn off you have to remove the socket, because it almost immediately starts to hit the frame when you unscrew it. You can also get it loose with a box wrench, but you will need the right size socket to torque it back on with your nice brand new torque wrench.
In general if you have a bolt or nut that is tight its better to tap the wrench than to try to brute force torque it off - tapping the wrench acts like an impact wrench, and is less likely to bugger up the threads.
Last edited by KCW; 09-10-2019 at 08:39 AM.