Sport Rider Photos
The valves included in the kit (the left of each pair shown here) are flat-faced to increase compression slightly. The stock valves are a two-piece design, while the kit parts appear to be one-piece. The heads on the kit valves are thinner and have a shallower dish, offsetting the additional weight of the flat faces-the kit valves are each about one gram lighter than the stock parts (22.5g versus 23.7g intake, 21.5g versus 22.3g exhaust).
Triumph Daytona 675 Valves