Motocross bike wont start when cold?

Rach

New member
Got a 1990 suzuki rm 250 bike, had a new piston and barrel and from cold it wont start off the kick start, only with a push.

Once warm it will start with the kick start, has plenty of power and runs well when going.

Can anyone help me out as to why it wont start, would it be a choke problem?
 
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