Bike getting overheating engine

overheating shouldn't be an issue. unless the pistons have been modified for hi-compression and inadequate octane is being used and it's being operated in high temperature region,i don't see an overheating issue. I have ridden these bikes in areas like death valley,las vegas and throughout the southwest and these engine won't heat enough to seize up. with ample fuel and spark during an attempted restart,the only reasonable possibility is your pick-up coil inside the cam cover. this inductive coil is in a heat sensitive area. this coil is mounted on a movable plate that affects timing. ,With adequate amount of fuel and a healthy spark you have all the ingredients of a start and run condition. this points to the direction of proper time and possibly a heat related condition. you may want to look into the pick up coil inside the timing cover. if it's original it has serve you well.While in this area,inspect the three wires attached to the pickup coil.

Here is an article I wrote just for this situation:
How to diagnose an overheating BMW

Put the bike on a stand or make sure the bike is level and upright. Start the bike. Let run for 1 min. Shut down. Let sit for 5 minutes. There is a dipstick on the frame below the handlebars on the left side of the bike. Unscrew and check. Another important check to do is to check that you have pressure. On the back side of the head, you will see a metal line running up it. Just to the right of the top of the line you will see a 8mm bolt. This is the oil gallery bolt. Loosen it quite a bit and start the bike. if within one minute you do not see oil seepage from it, you do not have oil pressure. Shut the bike down as this will seize the engine within a couple of minutes. If you have pressure, tighten the bolt back to 7.2Ft. LBS. I suggest you get a service manual for this bike though as it has alot of important information that can help keep you from making costly mistakes. I can send it to you for $30 digital, or $100 grease proof and digital binder copy.

After letting a bike idle for 30 minutes it would make me suspect that the bike was overheating...its not good to let a bike idle that long.. this is one of the two reason that California lets bikers split lanes... one is motorcycles will take up less space in traffic and the other is that it gives a chance to keep the bikes engine cooler with a constant airflow over the engine.
Now , #1 check radiator coolant level, if low, top it off with coolant. #2 if the bike idles fine after "approx". 5-10 minutes ( normal operating temp)...and your not overheating, then continue to let it idle till it gets to "around" 185 degrees or so..if you don't hear the fan come on, then get on your bike and ride it around the block to cool the engine down, if that helped then you know its a bad fan, or bad thermostat/fan switch. The trail of water you saw could also have come from the coolant overflow tank hose at the bottom of the bike when it was overheating...make sure that the coolant reserve tank is filled to the appropriate level. Also check your oil to make sure that it doesn't have water in it..if it does...it"ll appear like a bubbly milkshake; if the oil is good, then chances are good that at least no internal damage was done. If after all this and it doesn't overheat and the fan comes on! then you"ll have to pull your fairings and check "all" the hoses for leaks. Hope this helps you out. Please can i get some feedback on this and let me know if this helped. thanks!

that can not actually on the battery, check cooling water, oil check ...
it could be that the head gasket has been destroyed.
of air filters has not hurt the testing pass muster(has not distoid this).
diagnostics for a better one, we need more information.
nice greetings from Germany

Blown head gasket, get it replaced.

Hi,
Engine overheating? Check:
1. Coolant level at cold
2. Coolant leak check for loss of, during "not hot" running condition. (water pump, hoses)
If above is ok, I would replace the thermostat. It's inexpensive and easy enough to do.

Cam belt not addressed in this response...

Hope this helps with the overheating problem... Good luck!

I've never been a big fan of automotive oil in a bike. That being said, maybe the Castrol can be used in bikes too I don't know. Anyhow, hopefully someone will be along that can better answer that part of your question. There have been many discussions pertaining to what oil to use. Drop a PM to OilDoc. He can probably answer that question very quickly for you. If this was a car, I'd say that the thermostat was stuck. Maybe start there.