RR21/RR22 Reg/Rec is full of MOSFET technology and listed for Honda CB550SC Nighthawk, CBX550, CBX550F, CBX550F2, CB1000C, CBX1000 PROLINK, CB1100F, CB1100R, CB750C, CB750F2 DOHC, CB750F, CB750KZ, CB900C, CB900F, CB900F2, CB1100, CBX600E, CB650SC Import & CBX650
 
MOSFET technology produces less heat than conventional shunt regulators. Works where airflow is limited and has inbuilt thermal protection.