Why do I get ticking sound in my bike after I stop the engine.?

Why do I get ticking sound in my bike after I stop the engine.?
After I drive for a long/short, if I stop the engine ticking sound comes from the bikes engine, Can anyone tell me why it is. Thanks in advance.


Answers:

devil d:  hot engine. ,
2007-03-03 22:19:52
cool_hand_luke613:  that's the engine cooling down. the metal is contracting.
2007-03-03 22:20:20
aicradiohead:  It is just your engine cooling down rapidly. Usually happens a lot after you ride it hard. I have a dirt bike and have been around 4-wheelers all of my life and they all do it.
2007-03-03 22:20:25
Wolfsburgh:  RTH, After you shut off the motor, friction and combustion ceases to heat the metal, therefore cooling it off considerably. That 'ticking' is the sound of the metal contracting after expanding from the heat produced by friction and combustion.
2007-03-03 22:20:42
bellabellabella:  the engine is hot and just cooling down. I grew up on a farm with motor bikes and I can always remember them ticking when you turned them off, alot of cars do it aswell. I wouldn't worry about it.
2007-03-03 22:23:04
fordman:  It's just cooling down. Aluminum expands and contacts a lot with heat, so it is just shrinking back to normal size. No biggie.
2007-03-03 22:24:08
bwiz2007:  Your engine is hot and cooling. Fan maybe on. Take it to a bike shop and have them go over it. Better safe then sorry. You have no protection on a bike. Road rash hurts..lol
2007-03-03 22:26:21
Bassam F:  Its just the metal cooling down , it happens in the cars always, no need to worry.
2007-03-03 22:27:56
zuki1200:  Thermodynamics. Physical stresses releasing as the metal cools.
2007-03-03 22:38:54
Chosen Answer
Curious George:  Your engine and exhaust are made of different metals aluminium and steel. where there is contact of aluminium and steel the aluminium is shrinking 3 times that of steel when it's cooling down so it tends to creep over the steel, that's what causes the sound. Don't worry it's normal.
2007-03-04 01:19:16
BikerBob:  Everyone here has it right. It's just the metal in the engine cooling down and contracting. No need to bring it in for service for this.
2007-03-04 09:40:02
DAVER:  You got heat sheilds on your pipes? If so that is the sound of the pipes cooling down and the heat shield cracking back into place (since they may expand a bit due to the heat)...
2007-03-04 18:55:55