APE introduces the Hayabusa Pro Series manual cam chain tensioner. This new tensioner is designed for the racer who frequently adjusts his engine. The easy-access socket head adjuster screw is perfect for tight spaces. The interior o-ring design ensures that repeated adjustments will not eventually flatten the o-ring against a jam nut. The Hayabusa Pro Series tensioner is anodized gun-metal gray, with stainless steel hardware and a fully machined adjuster bolt. It comes with two 6mm mounting bolts and gasket. FITMENT ST1300-PRO Hayabusa Gen1  (Comes with  2 – 6mm bolts, and gasket.) ST1000-3-PRO GSX-R600 2004-07 GSX-R750 2004-07 GSX-R1000 ’03-08 (Gasket included.) ST1300-08-PRO Hayabusa G1-G2 GSX-R1000 2009-16 GSX-R600 2008 GSX-R750 ’08-18 (Comes with 2 – 6mm bolts, and gasket.) KTZX14-12-PRO ZX-14 ZX10 2019-20 Ninja H2 2017-20 (Gasket not included.) KTZX10-PRO ZX10 2006-15 and 2017-18 (Gasket not included.) BT1000-PRO BMW S1000RR (Comes with O-Ring.) INSTALLATION INSTRUCTIONS CAUTION: Incorrect installation of a manual cam chain tensioner may result in severe engine damage. If you are not certain how to install the cam chain tensioner then it is advised that it be installed by a shop who is familiar with this process. IMPORTANT: When replacing any hydraulic oem tensioner with a manual tensioner, it is important to make sure that the oil passage that supplied the oem tensioner is blocked off. Failure to do so could result in a low oil pressure situation. INSTRUCTIONS To set the tensioner adjustment, rotate the engine forward while screwing the tensioner bolt in. When you feel the engine tensioner parts (guide, rollers, etc.) make contact with the moving cam chain, back the tensioner bolt out 1/4 turn and tighten the jam nut. (For the finer pitch thread on the APE Pro Series tensioner it is advised to back the tensioner up 1/2 of a turn.) DO NOT over-tighten the cam chain, as cam chain guide damage could occur. Be sure jam nut is tight against the tensioner body when complete.