Drove bus home today and the revs are constantly high, a lot higher than usual - he also seemed to be running hotter too. Could this be due to an incorrect size fuel line? My fuel line from the malpassi filter to the first of the twin carbs was leaking, a lot! This has been replaced. i thought this should be a 7.3mm hose (but what do i know?) but the chap who replaced it said that was too big and has used 5.6mm hose. Would this cause the issues? the 5.6mm does look quite a tight fit onto the carb! I need to get the bus to the mechanic on Monday night for a tuesday check over but am concerned that by driving it again like this could do some permanent damage - there are a lot of hills between me and the mechanics -could it cause permanat damage or is it just annoying? could it be something else?