These are genuine Suzuki OEM factory replacement parts. All Bearings are sold as half moons.  You need two (2) of the same bearing color for each journal. Please refer to your service manual for additional specifications and directions. Please read all the details below before placing an order. If you are unsure of what you need, contact your engine builder. FITMENT The fitment lists below include the Main Bearing Color / SKU / Thickness. All models require ten (10) bearings for a complete rebuild. All Bearings are half-moons. To make a complete bearing, you need to order two (2) of the same color. Each journal requires two bearings. Ten (10) bearings equal five (5) complete bearing sets. This item is ineligible for returns. Please ensure that you have the correct part numbers prior to purchase. Suzuki Hayabusa Gen3 / 2022 Journals 1, 3 & 5 use Gen3 bearings.  (12229-10L00) See diagram. Journals 2 & 4 use Gen2 bearings. (12229-15H10) See diagram. Brown / 12229-10L00-0C0 / 1.498 -1.501 mm Black / 12229-10L00-0B0 / 1.495 -1.498 mm Green / 12229-10L00-0A0 / 1.492 -1.495 mm Yellow / 12229-10L00-0D0 / 1.501 -1.504 mm Blue* / 12229-10L00-0E0 / 1.504 -1.507 mm Suzuki Hayabusa Gen2 / 2008-2020 Green / 12229-15H10-0A0 / 1.492 – 1.495 mm Black / 12229-15H10-0B0 / 1.495 – 1.498 mm Brown / 12229-15H10-0C0 / 1.498 – 1.501 mm Yellow / 12229-15H10-0D0 / 1.501 – 1.504 mm Blue* / 12229-15H10-0E0 / 1.504 – 1.507 mm Suzuki Hayabusa Gen1 / 1999-2007 Green / 12229-24F00-0A0 / 1.488 – 1.492 mm Black / 12229-24F00-0B0 / 1.492 – 1.496 mm Brown / 12229-24F00-0C0 /  1.496 – 1.500 mm Yellow / 12229-24F00-0D0 / 1.500 – 1.504 mm *We do not have Blue bearings in stock, but they can be easily ordered. Shipping may take a few days. HOW TO CHOOSE COLOR/SIZE If you have an OEM Crankshaft and OEM Rods, refer to the directions in your service manual for the Bearing Selection Table. If using after-market parts, you will need to measure using a Plastigauge or a micrometer and dial bore gauge to determine which size you need. Note: Some engine builders prefer to use Gen2 main bearings in a Gen1 engine. The Gen2 features a slotted oil hole versus the round hole on a Gen1. REFERENCE Check out this video from our dealer, Willis Racing, as he explains the process of changing the Crankshaft Main Bearings on Hayabusa Gen1. *This item is ineligible for returns. Please ensure that you have the correct part numbers prior to purchase.*