The Main jets are the ones that hang down in the middle and are round. You installed 112.5s. There are also Pilot (slow) jets. The stock size on these is 38. Installing a 40 will richen the mixture in the low RPMs, which is were you are lean if the bike's idle is hanging.
Just to clarify:
Main jets:
Pilot Jets:
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Addicted to anything that has an engine and rolls.
