Hello, I recently rebuilt the topend on my 06. I took it out to the randsburg area for some mild trail riding to break it in. It ran great for the first few rides then all of a sudden the motor got tight and cut off. I kicked it a times and the Kickstarter felt very stiff and gritty. After kicking it over a few times it loosened back up and fired up a again for a few minutes before tightening up and stalling out again. Question is, is my bottom end hosed? What is causing it to run tight and stall but then still be able to kick it a few times and it frees up and starts?