why wont my yz450f kickover

i recently bought my first dirt bike which is a yz450f 2013 model i bought it about a week ago only ridden it twice and today for some reason out of no where it wont kick over the compression on it feels fine no leaks what could it be
 

SRAD97750

Moderator
Staff member
Howdy,
When a 4T goes from starting one day to not starting the next, I typically like to check the valve clearance.
Otherwise the usual suspects should be first. Fuel, Spark, Airfilter.
Let us know what you find!
-BIG DAN:thumb:
 
Howdy,
When a 4T goes from starting one day to not starting the next, I typically like to check the valve clearance.
Otherwise the usual suspects should be first. Fuel, Spark, Airfilter.
Let us know what you find!
-BIG DAN:thumb:
at first i thought it was no petrol but i filled it up 5 L’s today and it still didnt start
 
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