What oil to use for honda dylan - 2006 Honda Dylan 125

SOURCE: why does my honda dylan ses 125cc run very very

it may have a blown head gasket or the thermostat needs changing,, also check the rad is clear and water can flow through it freely as wel as air,,and check if the cards are not running a bit on the week side,, have you or anybody been playing with the exust pipes like swoping them for a sporter type???? this would make the engine run week and would cause it to over heat as well,,give her a good tune up