I have the following cam, springs and rockers currently in a vc460. Don't have any experience with ported heads on small engines so not sure what to expect for torque and horsepower gains. The bike the vc460 motor is installed and would run in the 2600-5500 rpm range with a tuned 40 series clutch.
Thanks in advance for your help.
http://www.nrracing.com/product-p/head-racing-gx390-small.htm
390CAM-280-0211 Camshaft, 280 0211, GX390 (Approx .280 lift and 220 duration (at .050)) + 390-BLUESTRIPE-PAIR Springs, Valve, 50lb Single (Blue Stripe) from NRracing
CHAMP390 Rocker Arms, Shaft Mounted (Champion), GX390, GX420, & 460cc , 1.1 to 1
Thanks in advance for your help.
http://www.nrracing.com/product-p/head-racing-gx390-small.htm
390CAM-280-0211 Camshaft, 280 0211, GX390 (Approx .280 lift and 220 duration (at .050)) + 390-BLUESTRIPE-PAIR Springs, Valve, 50lb Single (Blue Stripe) from NRracing
CHAMP390 Rocker Arms, Shaft Mounted (Champion), GX390, GX420, & 460cc , 1.1 to 1