Someone did not measure when they made the flywheels. The stock S2 flywheel bolts are a touch too long and bottom out inside the crankshaft. The flywheel might seem tight, but if left alone, you will snap your flywheel bolts. We've seen this happen a few times now.
These are the proper bolts to use when using the ClutchMaster F2K Flywheels.
Sold as a set of 8.
Also we will provide you with proper specs and instructions to minimize flywheel bolts loosening.
Even when using all correct hardware, we’ve seen many flywheels come loose and sheer bolts. The K24 engines at high rpm will produce some violent harmonics. If you start to feel some addition vibrations along with difficulty shifting, STOP right away and check your flywheel bolts. If caught soon enough, you’ll save yourself LOTS of time(and money) in repairs. For this reason, we highly recommend using a steel flywheel for track use.
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OEM Honda S2000 Clutch Disc & Pressure Plate
Clutch Masters Steel K Swap Flywheel designed to work with the adapter plate and a K series engine to S2 transmission. We strongly recommend the steel flywheel over the aluminum on K24's that are spending a lot of time in the higher RPM's. The long stroke of an inline 4 produce some intense harmonics that can result in transmitting those harmonics into your clutch, or even worse, cause loose/broken flywheel bolts. DO NOT USE your S2000 flywheel bolts. They are too long and will bottom out before properly fastening. We sell the correct bolts.