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Heavy Duty Studs & Nuts

 

Main Studs

Main Bearing Studs

These are heat treated chrome moly main bearing studs. These studs feature rolled threads, centerless ground surfaces, and come with competition style twelve point flange nuts. As racing's leading supplier of heavy duty engine stud kits, APE already has their very popular top end cylinder studs for the big Suzuki, and now turned their attention to the bottom end. By replacing the bottom end bolts with heavy duty studs, it helps minimize the chances of high output engines trying to separate the engine cases at the crank center line resulting in oil pressure loss and possible engine bearing failure.

Cylinder Studs

Cylinder Studs

The Hayabusa engine uses head bolts instead of the preferred stud arrangement. When engines are subjected to bigger bores, higher compression ratios, nitrous oxide, turbo, etc. the stock head bolts are not up to the task. Blown head gaskets are the result.

APE is the leading manufacturer of heavy duty cylinder studs for motorcycles. The Hayabusa studs are made from ultra high heat treated premium 8740 steel and feature rolled threads for maximum strength. Torque to 60 lbs. 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 them to also be used with no plate when using APE 18-CHN10125-10 cylinder head nuts.

Please note that the cylinder head can not be removed with engine bolted in place when using studs.

Cylinder Head Nuts

Cylinder Head Nuts

Super heat treated cylinder head nuts are a must for high output engines. Help prevent blown and leaking head gaskets caused by the threads in the soft stock nuts stretching. APE nuts are machined from alloy steel and fully heat treated for maximum strength. Nuts are .150" taller than stock to prevent the nut from bottoming out on the stud when the head has been milled. P/N 18-CHN10125-10 are 10 mm x 1.25 with 3/4" base dia. For use with any application requiring the smaller 3/4" base diameter - 18-CS1300STN & 18-CS1000GSX. Set of 10.


APE Countershaft Stud Kit HayabusaCountershaft Stud Kit

APEhas developed a stud kit that holds the cases together behind the countershaft. The advantage of the stud over the oem bolt is that a bolt can not use all of the thread in the case or it bottoms out. APE studs go in all the way to the bottom using all of the case thread. Also, studs are not removed evertime the cases come apart. The stud is manufactured the same way we do our world famous cylinder studs. Same heat treat and threads rolled after heat treat. Comes with a special APE nut. The high tensile strength does not loosen and allow the case to flex. Why take the chance. The cases can not be repaired when they break here.

Part Number

Description Racer Price

18-MBS1300GSX

 APE Main Bearing Studs Hayabusa

$89.95

18-MBS1000GSX

 A P E Main Bearing Studs Gsxr 1000

$89.95

18-CS1300STN

 APE Cylinder Studs Hayabusa

$89.95

18-CS1300-1/2

 A P E Hayabusa 1/2' Cylinder Studs & Nuts

$159.95

18-CS1000GSX

 A P E Cylinder Studs Gsxr 1000

$89.95

18-CHN10125-10

 APE Cylinder Head Nuts Hayabusa and GSXR1000

$56.62

18-OPSSBUSA

 APE Hayabusa Countershaft Stud Kit

$19.95

18-CSZX14

 APE Cylinder Studs with Nuts ZX14

$129.00