The new Nihilo Concepts Factory Chain adjuster Blocks are designed after the Factory KTM adjusters. Nihilo went one step further making the trick Billet adjuster blocks light weight and super strong. These blocks are for the serious racer, they don't have adjuster marks eched on them because factory mechanics don't use them they always measure the blocks from the end of the swing arm to assure perfect alignment. The OEM axle threads into the left side adjuster block,Nihilo eliminated the triangle stand hole, I never saw a factory bike use a triangle stand. When a hole is left in the adjuster dirt and grime will fill the hollow axle and cause the nut to seize. The long side of the adjuster is longer than stock allowing the axle to be set up as far back as possible. Lengthening the bike is a good way to eliminate sketchy handling and is something most fast riders and factory mechanics try to do. By making the adjuster longer the adjusting bolt does not need to stick out of the swing arm as far giving it more strength and adjustability. You need to try these Factory adjusters to see for yourself just how trick they are.