High revs after warm up

Posted by Richard on Nov 09, 2015; 9:56pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/High-revs-after-warm-up-tp4058997.html

After replacing  new carb insulators  and rechecking  for leaks it still revs to 3000 rpm after a few miles of riding. I noticed on another set of carbs there  is a plastic "T".between  carb 2 and 3.  The carbs that are on my bike has a piece of clear tube between  the  2  and 3 carbs with no vent hose. Could this cause the revs to go up?