A brief history of my bike... 2009 YZ250F with 2 previous owners before myself. The two previous owners did not take the best care of the bike. One of the intake valve guides broke not long after I purchased the bike. I tore the entire engine down and rebuilt the entire top end after the intake valve guide broke. The bike shifted great before the very first time I tore the engine down. Current time... I have had nothing but shifting trouble ever since I put the engine back together. I have split the cases at least 5 times previously trying to track down and fix what is causing the shifting issues. I split the cases again tonight...this is getting absolutely ridiculous . From neutral, I cannot shift into 1st unless I damn near jump on the shift lever. If I put normal pressure on the shift lever when trying to shift from neutral to 1st, I hit a false neutral even while spinning the rear wheel. Shifting into 2nd from neutral is easy. Shifting from 2nd to 3rd, the transmission goes into a false neutral even while spinning the rear wheel. Shifting from 3rd to 4th is clunky but doable with excessive pressure. Shifting from 4th to 5th is easy. My friend let me swap in his shifting mechanism (shift star, entire rachet system, etc.) into my engine today to test. His parts made no difference in the shifting. The transmission shafts and gears appear to be in great shape. The shift cam is in great shape. The shift cam bearing rotates like a brand new bearing. All the parts of my shift mechanism appear to be in great shape. All of the shift fork pin bores in the cases are in great shape and round. The long pin in one of the shift forks has a bit of side to side and rotational play (enough to feel and see). The two other long pins in my other two shift forks are nice and tight...no play whatsoever. PLEASE help if you can. I will truly appreiate any help I get. I am at my wit's end with this thing. I'm over it .