Husqvarna TC 450 Workshop Manual page 337

"KIT" ASSEMBLING INSTRUCTIONS
4- KEIHIN 41 (TC 450 - TXC 450-510) - Remove the carburetor (page E.9).
The kit consists of:
1- Idle jet: 42, 48
3- Main jet: 185
Remove the floater chamber (A). Replace the parts 1 and 3 with the KIT parts Reassemble the carburettor in the reverse order that
was shown for disassembling.
Part. N. 8000 H1344 (10-2009) O.7