WR450F 03 won't kickstart cold

I have a WR450f 03', the starter motor has always been a problem, but worst still it almost always gives me a hard time trying to kick start it cold, sometimes it will but not often. When it's hot, no worries. It has a new plug and gets good spark. Is this a jetting or valve clearance problem?

Tight valves create hard starting at any engine temperature.

What jetting are you running? You might be a bit lean on the pilot jet, you should be running a 48.... I think, check the jetting database.

Tight valves create hard starting at any engine temperature.

What jetting are you running? You might be a bit lean on the pilot jet, you should be running a 48.... I think, check the jetting database.

Thanks mate, I took the carby off and will check that as i'm not sure

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