I'm installing the factory AIS removal kit for an 07wr450 and I have one extra leak jet. one is a #45 and the other is a #110. I have thouroghly read the instruction I have so far installed the Pilot #50, Main jet#175 and Main Air Jet#110 (which goes into the hole that didn't have a jet originally- per instructions). I have checked off the items in the kit one by one and have an extra piece! So, I have two leak jets that are exactly the same in measurements yet the sizes are different a#45 and #110. The itemized list that comes with the Yamaha kit does not give the leak jet size...it just states 1 pc. should be in the kit. They are both leak jet and could fit nowhere else.... The 450 manual doesn't say what size either.... Does anybody have any knowledge about this? Which jet is the one I use? thanks in advance.