YBR125 motorcycle valve tube set, total length 31.5MM, outer diameter 11MM, aperture 5MM and the original car valve hole completely match, direct replacement without ream/shrinkage hole; With valve tube sealing ring, one-stop solution to guide + sealing needs, save the trouble of purchasing seals separately; The tube is made of wear-resistant alloy, resistant to high temperature and friction, and suitable for frequent reciprocating valve movement. The inner and outer diameter error is very small, and the valve, cylinder head hole fit closely, valve reciprocating without loose, no abnormal sound; After replacing the old catheter, the valve can be installed and used, with strong adaptability.