1990 yamaha yz80 not kick starting

so i have a 1990 yz80 and it wont kick start when it is cold so i have to bump start it but when it is warm it kick starts first or second kick. It will bump start the first push but no kick starting. CAN YOU HELP ME!

Assuming carb is clean, filter clean I'm going with compression is low. Do a compression check


it has enough to be able to kick start but when it is warm it will kick start first or second kick. like i said i will not kick start when it is cold. by the way i just got a new carburetor and new air filter.

low compression ?

Needs top end work, almost certainly

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