Hardened mixer tube, especially for Keihin PWK 33 and 35 carburettors, from KR Automation.

KR Automation had the problem with the Keihin PWK 33 and 35 that the carburettors start to "over-grease" after a few hours of operation. This was a problem that could not be solved even with modified jetting. KR Automation found the cause to be a worn out mixer tube. KR Automation has therefore developed a mixer tube made of nitrided, CNC-manufactured steel. The harder material prevents the mixer tube from becoming worn.