KrytenUK1971 Posted April 18, 2014 Share Posted April 18, 2014 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 Link to comment Share on other sites More sharing options...
Moderator Airhead Posted April 18, 2014 Moderator Share Posted April 18, 2014 Garry, the head gasket has failed, you should check the head for being warped as well Link to comment Share on other sites More sharing options...
dt502001 Posted April 18, 2014 Share Posted April 18, 2014 Humph not even a thankyou,no wonder why first post are going un answered. Link to comment Share on other sites More sharing options...
KrytenUK1971 Posted April 19, 2014 Author Share Posted April 19, 2014 Sorry only just read your reply, thanks for the answer. Link to comment Share on other sites More sharing options...
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