bronze bushes for motorcycle electric starter system compatible with EC 300 2021-2024, EC 250, EX 250, EX 300 and EXC 300 models.The bushings in the starter system are prone to wear and may lead to damage in the -, crown wheel, or engine casing if not replaced.These replacement bushes are made from bronze material and designed for improved and consistent performance.Machined using CNC technology for precise dimensions and proper fitment.Features a 30° chamfer on the edges to aid installation.The kit includes one short bush equivalent to 55140030100 and two long bushes equivalent to 55540031000, along with one installation tool.This combination accommodates different configurations found on model year 2019 and later motorcycles, as some models use two long bushes while others use one long and one short.Bronze bushes are intended for light press fit into the engine case and cover.In cases where the bore is worn from previous bushing movement, use of a retention compound is recommended to secure the bushings.Replace or repair damaged bores before installation to proper function.