I loved my Kerker ---I had the last SOHC 750 four, the maroon 1978 F1, with the hybrid steel/aluminum Comstock wheels and orange stripe on the tank. I had it punched out to 828, balanced and blueprinted, put a bank of smoothbore mikuni carbs with K&N filters. It made that Kerker scream. My big brother had a Hooker header on a smaller Honda, it sounded good too. Sorry guys...I got off on a tangent.