KrytenUK1971

Sorry only just read your reply, thanks for the answer.

Hi, My stepson has a TZR 125 which has a problem with the water in the expansion tank. When riding the pressure builds up and blows the filler cap off and the engine seems to be getting hot, just over half after a 5 minute trip. When the engine is ticking over the water in the expansion tank appears to be boiling, surely thats not right. Has anyone got any ideas as to why this is happening. Many thanks in advance. Garry