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Hi guys, hope someone can help. Just bought a 2014 crf 450 but is very very hard to start, I'm talking 20-30 kicks. Valve clearances are good. Timing is spot on. The mil light doesn't flash while I'm kicking the bike which concerns me as all my other crf bikes have done. Is there any known faults with these bikes people know of before i tear down the top end. Also what is the standard idle screw setting

With EFI there's a long list of things that could be causing this. Best thing to do is get the service manual and go through the troubleshooting section very carefully to diagnose it. Remember even with EFI it's still all about fuel, compression and spark.

Ken