I just bought a fcr carb for my 05 DRZ-SM. It was used, and have no idea what size it is or if it will work. so I call apon the gods for your wisdom. 5TA1 00QH21 are the num. it has a TPS but no hot start. he told me it came off a 03 YZ 450. I need the truth! please help for I am in the need for more HP. thank you.