Head Gasket blown = Cracked Coolant bottle? lolwut?

Okay, ive recently been doing wheelies and sometimes i hit the front end down very hard, ive stopped now due to whats happened, but i my coolant bottle has a tiny crack in it by the mount and its leaking onto the radiator and steaming, the bottle is also loosing water, which isnt good if i want to go anywhere. my friend says the headgasket is gone so it blew a crack in the bottle, i highly doubted that, but i have noticed when im sitting idle in traffic lights that the idle starts picking up quite a bit, usually this is from an air leak, but it may just be out of adjustment, can someone try and clear things up for me a bit, thanks for reading

Matt

 

Okay will check the head today, do you reckon putting sealant on the crack will fix the water bottle? or should i just melt the crack together?

 

Okay, strangely, my Circular head gasket was broken, but the outer gasket was fine, the spark plug hole is also cross threaded, i have got another head to put on and a new gasket, do you think this will stop my problem of running lean/out when i go full throttle?

 

will do, i found water in the piston, so my headgasket was definetly gone, also, where abouts are the temprature sensors on an aerox?

 

also, can an air leak in the cooling system make the engine run lean?