Premium cylinder head upgrade.
Features CNC machined port shapes, larger high performance valve seats and custom made valves. Valve sizes are increased from the tiny stock 33mm intake & 28mm exhaust to 36mm intake & 32mm exhaust.
This is not a radical modification. These bigger valves bring the valve sizes up to what would normally be found on other brands of 650 singles.
We strongly recommend checking valve to piston clearance when installing oversized valves.
This option is ideal for those who desire the least amount of down time to install this engine upgrade.
This kit includes a core charge that allows us to ship your kit before we receive your stock cylinder head core in 'good' condition. More details regarding core exchange linked below.