The FMF Powercore 4 S/A Exhaust System, manufacturer part number 040084 and vendor part number 79-2659, is designed for Honda XR100R motorcycles from 1986 through 1995. This model provides a performance-focused replacement for the original exhaust system, delivering improved exhaust flow while maintaining a practical design for off-road riding. The system is also compatible with the Honda XR80/XR100 platform where applicable; verify the specific motorcycle configuration before installation.
Built with an extruded aluminum canister and a stainless steel midpipe, the FMF Powercore 4 uses precision MIG/TIG-welded construction for strength and durability. Its high-flow core provides increased surface area to absorb sound while allowing exhaust gases to move more efficiently. Space-age internal packing helps support consistent sound control and performance during extended use.
The Powercore 4 S/A is lighter, stronger, and more powerful than a stock exhaust system. It includes a maintenance-free stainless steel spark arrestor screen approved by the U.S. Forest Service, making it suitable for applicable trail and off-road environments where spark-arresting equipment is required. Confirm local riding regulations and installation requirements before use.
Installation should be performed using the motorcycle manufacturer’s service procedures and compatible mounting hardware. This FMF exhaust system is intended for the listed Honda XR100R applications, including model years 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, and 1995.
Features:
- High-flow core: Provides more surface area for sound absorption while supporting increased exhaust flow.
- Aluminum canister: Uses an extruded aluminum construction for reduced weight and durable performance.
- Stainless steel midpipe: MIG/TIG-welded stainless steel construction supports strength and long-term reliability.
- Internal packing: Space-age packing material helps manage exhaust sound and maintain consistent operation.
- Performance design: Lighter, stronger, and more powerful than the stock exhaust system.
- Spark arrestor: Includes a maintenance-free stainless steel screen approved by the U.S. Forest Service.
- Fitment: Fits 1986-1995 Honda XR100R motorcycles and is designed for the XR80/XR100 application platform.
Fitment:
1986 Honda XR100
1986 Honda XR100R
1986 Honda XR80
1986 Honda XR80R
1987 Honda XR100
1987 Honda XR100R
1987 Honda XR80
1987 Honda XR80R
1988 Honda XR100
1988 Honda XR100R
1988 Honda XR80
1988 Honda XR80R
1989 Honda XR100
1989 Honda XR100R
1989 Honda XR80
1989 Honda XR80R
1990 Honda XR100
1990 Honda XR100R
1990 Honda XR80
1990 Honda XR80R
1991 Honda XR100
1991 Honda XR100R
1991 Honda XR80R
1992 Honda XR100R
1992 Honda XR80R
1993 Honda XR100R
1993 Honda XR80
1993 Honda XR80R
1994 Honda XR100R
1994 Honda XR80
1994 Honda XR80R
1995 Honda XR100R
1995 Honda XR80
1995 Honda XR80R
1996 Honda XR100R
1996 Honda XR80
1996 Honda XR80R
1997 Honda XR100R
1997 Honda XR80
1997 Honda XR80R
1998 Honda XR100R
1998 Honda XR80
1998 Honda XR80R
1999 Honda XR100R
1999 Honda XR80
1999 Honda XR80R
2000 Honda XR100R
2000 Honda XR80
2000 Honda XR80R