recently got the frame powder coated and new top end (cylinder and weisco hi comp piston) after getting everything back together it wont start. I've checked the timing a few times its bang on, mark on both cams and flywheel line up perfectly. Checked the coil and magneto and they are all within specs in the manual. Had the carb off and cleaned the jets. All that happens when I kick it over is the odd back fire other than that not a thing, I am not sure what to check next.