Its normal my bike does it when you first start it in the mornings nothing to worry about. You should only worry if it does it when the engine is fully warmed up.
White Smoke Low engine temperature (usually occurs during engine start-up) * No repair needed
Coolant or water leaking into combustion chamber * Bad head gasket
* Cracked block or cylinder head
Blue Smoke Engine oil being burned * Oil leaking into combustion chamber
* Worn piston rings, valves, or cylinders
* Bad exhaust manifold
* Bad head gasket
Black or Gray Smoke Incomplete fuel combustion * Cold engine
(no repair needed)
* Clogged air filter
* Carburetor, choke, fuel injection, or emission system malfunction
* Ignition timing off
* Low compression due to engine wear
White Smoke Low engine temperature (usually occurs during engine start-up) * No repair needed
Coolant or water leaking into combustion chamber * Bad head gasket
* Cracked block or cylinder head
Blue Smoke Engine oil being burned * Oil leaking into combustion chamber
* Worn piston rings, valves, or cylinders
* Bad exhaust manifold
* Bad head gasket
Black or Gray Smoke Incomplete fuel combustion * Cold engine
(no repair needed)
* Clogged air filter
* Carburetor, choke, fuel injection, or emission system malfunction
* Ignition timing off
* Low compression due to engine wear
