TB Parts 2v Big Valve Kit 24mm/21.5mm - Honda Grom/Monkey

TB Parts Big Valve Kit for the Honda Grom and Honda Monkey Cylinder Heads is a replacement kit for precut for big valves. These valves yield an additional +1.5mm intake and +0.5mm exhaust. Each valve is made with EV8 stainless steel, making this much lighter and more reliable with more strength. These characteristics including the larger valve size provide more flow allowing for better performance. Since the valves are much lighter, it helps to prevent valve from floating when revving higher. This opens up the bike to a better range of RPM.

Please keep in mind this does not fit the OEM stock head and will require it to be sent out to get machined properly. This upgrade will also require a fuel management system to regulate the flow into the head and out. Stock pistons will not work, a big valve piston designed to accept larger valves must be used with this kit. The kit includes valve springs, valves, pins, seals and seats.