I have an 08 kfx450r it has a full dasa exhaust, fci, Dr.d mod box and an accel coil upgrade. I recently added a manual timing chain tensioner and wiseco kx cams and a wiseco chain I got it all back together step by step from my manual topped it off with oil and went to start it and starts very hard when it does start. I had to use the cold start knob pulled out and it finally fired. I rode it for 15 min or so lightly to break in and shut it off and now will not start again. I checked valve clearances they were all to spec. Double checked timing that is all right on. Changed spark plug just in case. Still nothing. I checked the idle air knob backed down all the way counter clockwise and out 22 clicks. I am at a loss curious if someone out there has had similar issues or maybe something I can try. Any input is greatly appreciated.