my 2013 Yz450 recently jumped timing, had to replace the valves and broke 2 shim buckets, those were also replace.
problems I have are:
1. the bike sometimes take a few kicks to start (sometimes 4/5 kicks). valves are in spec and timing is spot on. sometimes it starts right up 1st or 2nd kick.
2. when riding after a few minutes, when the bikes warm up (operating temp), the revs tend to drop really low and bike cuts out, happens sometimes, and sometimes not. I feel like this is a sensor issue.
this is my first efi bike so its all new to me.
any ideas? thanks