Hi guys, I have a CRF 450 year 2011, and first I have some issues starting the bike, takes a lot of kicking, and once it is on, sometimes, when i just open a little the throttle, the bike shuts down. And sometimes when i am mid range to high rpm, it feels like the bike kinda chokes just a little and then back to normal. I am wondering if I should change http://www.motosport.com/dirtbike/oem-parts/HONDA/2011/CRF450R/FUEL-TANK-%282%29/FILTER-KIT%2C-FUEL/06160-MEN-A50 or change this http://www.motosport.com/dirtbike/oem-parts/HONDA/2011/CRF450R/THROTTLE-BODY/INJECTOR-ASSY.%2C-FUEL/16450-MEN-A51. Maybe I am totally wrong. Please help out guys. Thanks in advance.