Studs are the preferred fastener choice for high-performance engines. Unlike a bolt, a stud uses all of the threads in the case, and it doesn’t have to be removed during disassembly which adds wear on the case threads. Studs don’t twist like bolts when being torqued down, so torque readings are more accurate.
APE is the leading manufacturer of heavy duty cylinder studs for the motorcycles. The Hayabusa studs are made from ultra heat treated premium 8740 steel and feature rolled threads for maximum strength. Torque to 60lbs. APE head nuts are machined from billet stock and heat treated to prevent threads from stretching. This set up is a must for all serious go fast motors. Extra thread on the nut end allows then to also be used with no plate when using APE CHN10125-10 cylinder head nuts.
- Requires #CHN10125-10 Head Nuts (Sold Separately)
- 2008+ Hayabusa Engines head bolt washers do not come off the bolts. You can purchase stud washers separately.
When using APE stud kits for Gen 2 Hayabusa, it is necessary to order part # BHW1300 or part# 09160-10082