Ok so I bought a 03 YZ450F that wasn't running so I took off the carburetor, cleaned all jets and passage ways. I also noticed I think this carb has the original quickshot and I'm guessing it came with the red pilot screw. I got it to run for a minute or so but ran bad. I researched and found that there is supposed to be a spring and o ring for the pilot screw. I don't remember seeing a o ring and spring? Help please!