H&R 2.5 inch ID Single Race Spring Length 18 inch Rate 500 lbs/inch 1983-yamaha-yz125-esi9365072 5-Layer Performance Air Filter:This intake

5-Layer Performance Air Filter:This intake system utilizes an oil free

560 degrees F)

The Edelbrock #61159 Performer RPM cylinder head features fully CNC machined combustion chambers along with CNC profiled bowls and port entries/exits for improved air flow

Each fuel block has four holes for mounting to a fire wall and has a polished aluminum finish

H&R 2.5 inch ID Single Race Spring Length 18 inch Rate 500 lbs/inch 1983-yamaha-yz125-esi9365072 5-Layer Performance Air Filter:This intakeH&R 2. 50" I. D. Race Springs are made with extremely high tensile strength wire alloy which allows the use of a thinner wire. Manufactured using advanced materials and precision technology in Germany, H&R 2. 50" I. D. Race Springs are crafted from special lightweight (hf) 54SiCr6 spring steel. For any given spring rate, they are on average 15% lighter and have 10% more travel than competitors' springs. Main springs range from 6" to 18" in length and