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07 crf250 won't start

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I'm looking for ideas on why my bike won't start via kick-starter. I can have somebody push start me and the bike fires right up. The bike has plenty of compression and runs great once started.:thumbsup:

I just put in a 13.5:1 Wiseco piston.

My valves are shimmed to specs.

Brand New Plug.

Carb Is cleaned and jetted. (stock exhaust so doesn't need any special jetting)

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Is the cam timing right? You could be a tooth off. How does it perform?

I would start by setting your fuel screw. With the bike warm, turn it in until it idles down, then turn it out till it idles the highest/crispest. Test by bliping the throttle.

How does it start when it is warm?

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When I push start it to get it running it fires right up and runs really well.

I can run the bike till its hot, shut it off, then when I go to kick start it, it won't start. I can push it but whether its cold or hot it won't start via the kick starter

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i would check your valves again. they might be out of spec already. when my valves were cooked, i had the exact same problem. the shim only lasted about an hour of hard riding.

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I had the same thing happen, your timing is probably off.

The marks on my side case are not right. I sat a zip tie ontop of the piston and found true top dead center and then sure enough the bike fired right up after that.

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Do you mean on the side of the cam?

i think he means on the side of the clutch case where the marks are inside the transmission. with the 2 gears with a punch mark on each of them.

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