Specification: Piston size 12.7mm Main Material: Aluminum Thread Size: M10x1.25mm Fitment: Universal for most motorcycles Quantity: 1 pc Package Contents: 1 x Motorcycle hydraulic clutch brake pump Pump under the head of the head is silking, can a wide range of length ofthe distance, adjust position according to the model, using thread tighten glue,prevent loose change position. Some vehicles head is U plate (for Suzukiking GS125 machine, for example), as long as take U plate, installs to the pumphead end OOTDTYFixed long screw pump under as m10x1.25 standard, and the adjustable range is long,suitable for most models modified line of clutch and brake line, but some models(such as for Suzuki king GS125 machine) of the original car pull head fixed positionis silking, need to use 8.2 mm drill bit, removing silking to install Installation method: 1.First will fill the brake oil pump under lie flat, do not have air, silk mouth is verybig, can be seen there was a bubble 2.See above screw, tubing with good twist screws, do not tighten, request screwside holes can be exposed 3. This is the key, be sure to look good. Link on the pump and tubing, and highup, the oil pump oil cup, and then pressure several times at random (10) handle,OK now just waiting for (don"t allow any action) 5-10 minutes later, in the aboveside didn"t tighten the screw hole will see the brake oil flow out, then lock screw,exhaust 4. Hydraulic clutch exhaust complete inspection methods: push the pump underthe wire to the pump body en croute, hand pinch on the pump handle, handle tipto move about 3 cm, knead not bottom go to, is correct. (press the handle untilthe pressure not bottom go to, there are about 3 cm distance handlebar, itfinished the exhaust, but loading debugging), loading, must pull wire all out, againunder the fixed pump, (make sure to loosen the clutch handle, wire all stretchedout)