On the racetrack, the relatively weak clutch combined with the release delay valve can cause clutch slip on a fast shift in the higher gears. On the 2005 model year, they introduced the clutch delay valve along with a 5000rpm limiter when in neutral. Honda got smart, like Mitsubishi with the 2005 Evo, and installed a clutch release delay valve so that it didn’t allow the clutch to be dropped which reduced the shock on the drivetrain Mitsubishi was doing a LOT of clutch warranty work on the 2003 Evos as the owners were doing clutch drops at redline launching the cars. Well, 9000rpm clutch drops on slicks destroyed many a differential. In stock class, the car must be mostly stock but you can run very high grip slicks such as Hoosiers. ![]() When the S2000 first came out (the AP1 generation), it became an instant favorite out on the auto-x circuit in stock class. The other part of the weakness is due to a clutch release delay valve integrated into the slave cylinder. Part of the weakness is the clutch itself hey, it’s a Honda, it doesn’t exactly make a lot of torque. ![]() ![]() A weak spot of the AP2 drivetrain is the stock clutch.
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