Thank you for taking the time to read this and potentially help me fix my problem(s). I have a 2005 yfz450 and i can not get it to turn over with the starter, if i take out the starter gear the start turns fine. i have also tried removing the inspection cap and turning the motor by hand and that does work but it is very difficult. i took the motor apart to reset the timing and when i put it back together from everything i could see it was all on time from the top and the line behind the inspection hole. any ideas on why it might be so hard to turn over? thanks again.