TB CRF110 - Big Valve Kit +1.5mm intake and +0.5mm exhaust valve kit for the CRF110 All Years Specifications: Intake Valve: Base - 27mm Shaft - 66mm long Overall - 75mm long Stem thickness - 5mm Exhaust valve: Base- 21mm Shaft - 66mm long Overall - 75mm long Stem thickness - 5mm Our oversized valves are constructed out of EV8 stainless steel to provide superior strength and longevity over the factory valves. They are also lighter than the factory valves. Additionally, the valve profiles have been changed to yield better flow characteristics resulting in better performance. With these oversized valves you get the best of everything as the stainless material will long out live the stock valves, the bigger size will yield more flow thus yielding more power, and the lighter design will help prevent valve float give providing the potential to rev higher and faster and it frees up horsepower used to open and shut the heavier stock valves. NOTE: WARNING CRF110 2019 - UP with EFI You must use a fuel controller and properly tune the EFI to avoid engine damage