The Namura NA-40003-2 OEM-style piston kit is designed for select Yamaha YFS200 Blaster two-stroke engines from 1988 through 1997. This replacement piston features a 66.42 mm bore size and an 11:1 compression ratio, making it suitable for engine rebuilding and restoration applications that require a dependable OEM-style piston design.
This kit fits 1988–1997 Yamaha YFS200 Blaster models. Verify the existing cylinder bore, piston clearance, compression configuration, and service specifications before installation to ensure proper fitment. The piston kit will not accept OEM piston rings, and the included rings are not compatible with an OEM piston; the piston and ring set must be installed as a matched combination.
Manufactured by Namura and identified by manufacturer part number NA-40003-2 and vendor part number 187-400032, this piston kit is intended for professional installation or experienced powersports service work. Follow the engine manufacturer's installation procedures for ring orientation, piston direction, cylinder preparation, lubrication, and break-in. Confirm all related components are in serviceable condition before assembly.
Features:
- Brand: Namura
- Manufacturer Part Number: NA-40003-2
- Vendor Part Number: 187-400032
- Product Type: OEM-style piston kit
- Piston Size: 66.42 mm
- Compression Ratio: 11:1
- Fitment: 1988–1997 Yamaha YFS200 Blaster
- Compatibility: Will not accept OEM piston rings, and the included rings will not work with an OEM piston
- Application: Replacement piston assembly for Yamaha YFS200 Blaster engine rebuilding and repair
Fitment:
1988 Yamaha YFS200 Blaster
1989 Yamaha YFS200 Blaster
1990 Yamaha YFS200 Blaster
1991 Yamaha YFS200 Blaster
1992 Yamaha YFS200 Blaster
1993 Yamaha YFS200 Blaster
1994 Yamaha YFS200 Blaster
1995 Yamaha YFS200 Blaster
1996 Yamaha YFS200 Blaster
1997 Yamaha YFS200 Blaster
1998 Yamaha YFS200 Blaster
1999 Yamaha YFS200 Blaster
2000 Yamaha YFS200 Blaster
2001 Yamaha YFS200 Blaster
2002 Yamaha YFS200 Blaster
2003 Yamaha YFS200 Blaster
2004 Yamaha YFS200 Blaster
2005 Yamaha YFS200 Blaster
2006 Yamaha YFS200 Blaster