BOYESEN RAD VALVE 84-97 KTM125, BLOCK RAD-41, RAD41 socks EXHAUST DURATION (@1MM): 260

EXHAUST DURATION (@1MM): 260

The Ti-6 BC Exhaust System is only needed if rider is required to pass new AMA/FIM sound regulations

only changing a stock link rod

Ark 50 RR AC

BOYESEN RAD VALVE 84-97 KTM125, BLOCK RAD-41, RAD41 socks EXHAUST DURATION (@1MM): 260Boyesen Rad Valve RAD 41 RAD41 Now delivered with carbon fiber reeds for even greater performance gains Maintains flow velocity through the valve and redirects intake charge for more even distribution to the intake ports Sharper, quicker throttle response Added torque improves performance on hills, through corners and over technical jumps Increases horsepower in low , middle and especially the top end ranges One piece aluminum casting, no trimming or