The oil filter must be changed at least at every oil change. It filters burned particles in the oil, metal shavings and other such muck and increases the effectiveness of the lubricant. Regular oil changes are essential for preventing undue engine wear. Suitable as a replacement for the following OEM parts: MBK / Yamaha - 5TA-13440-00 / 5YP-E3440-00 / 5D3-13440-00 HF 140 / HF141. Also suitable on the following scooters. : FANTIC MOTOR 125 Caballero Motard LC (08-09) 125 Caballero R Competition LC (08-09) 125 Caballero R Competition Racing LC (08-09) 125 Caballero R Enduro LC (08-09) MBK VP Cityliner 125 (07-) YP R Skycruiser 125 (06-) TM RACING EN 250 F e.s. 4T (08-) MX 250 F 4T (08-) EN 530 F e.s. 4T (07-) MX 530 F 4T (07-) SMM 530 F B.D. e.s. 4T (07-) SMR 530 F e.s. 4T (07-) SMX 530 F Competition 4T (07-) YAMAHA VP X-City 125 (08-) WR 125 R (09-) WR 125 X (09-) YFM 125 Grizzly (07-) YFM 125 Grizzly Hunter (07-08) YFM 125 R Raptor (11-) YP R X-Max 125 (06-) YP R X-Max 125 ABS (10-) YP R X-Max 125 ABS Business (10-) YZF-R 125 (08-) WR 250 R (08) WR 250 R (09-) WR 250 X (08) WR 250 X (09-) WR F 250 (03-10) XG 250 Tricker (05) XT 250 (08) YBR 250 (07-11) YFM 250 R Raptor SE Custom (08) YFM 250 R/X Raptor (08-09) YFM 250 Raptor SE (08-) YFM 25RX (08-) YFM 25RX SP (08-) YFM 25RY (09-) YFM 25RYSEY (09-) YZ 250 F (03-11) WR F 450 (03-10) YFZ 450 R (09-) YFZ 450 S (04-05) YFZ 450 SV (08-) YZ 450 F (03-08) YZ 450 F A (11-) YZ 450 F Z (09-10)