This listing is for a set NEW OEM YOUTH ATV crankshaft seals. The part numbers for the seal are 0450018 and 0450017. 

Looked the part number up online and found that these will fit the following machines, may fit others too

• A01EA05CA SCRAMBLER 50 (2001) (A01EA05CA)
• A01EA09CA SCRAMBLER 90 (2001) (A01EA09CA)
• A01FA09CA SPORTSMAN 90 (2001) (A01FA09CA)
• A02EA05CA SCRAMBLER 50 (2002) (A02EA05CA)
• A02EA09CA SCRAMBLER 90 (2002) (A02EA09CA)
• A02EA09CB SCRAMBLER 90X (2002) (A02EA09CB)
• A02EA09CC SCRAMBLER 90X (2002) (A02EA09CC)
• A02FA09CA SPORTSMAN 90 (2002) (A02FA09CA)
• A02FA09CB SPORTSMAN 90 (2002) (A02FA09CB)
• A02FA09CC SPORTSMAN 90 (2002) (A02FA09CC)
• A03EA05CA/CB SCRAMBLER 50 (2003) (A03EA05CA/CB)
• A03EA09CA SCRAMBLER 90 (2003) (A03EA09CA)
• A03FA09CA/CC/CD SPORTSMAN 90 (2003) (A03FA09CA/A03FA09CC)
• A03KA09CA PREDATOR 90 (2003) (A03KA09CA/CB)
• A04FA09CA SPORTSMAN 90 (2004) (A04FA09CA)
• A04KA05CA PREDATOR 50 (2004) (A04KA05CA)
• A04KA09CA PREDATOR 90 (2004) (A04KA09CA)
• A05FA09CA SPORTSMAN 90 (2005) (A05FA09CA)
• A05KA05CA PREDATOR 50 (2005) (A05KA05CA)
• A05KA09CA PREDATOR 90 (2005) (A05KA09CA)
• A06FA09CA SPORTSMAN 90 (2006) (A06FA09CA)
• A06KA05CA PREDATOR 50 (2006) (A06KA05CA)
• A06KA09CA PREDATOR 90 (2006) (A06KA09CA)