if it's a two stroke the base gaskets got a hole in it. if it's a four stroke the head gaskets blown! i hope this info helps. did you leave the choke on?????? check the choke dude! an easy mistake that i even make! hahaha. make sure you warm the engine up and the flick it off. to be honest i can't remember what a trekker is specifically but all engines are basically the same. if it's water cooled the hot water when it warms up automatically switches the choke off. look for the choke mechanism on the side of the carb. i hope this info helps.
graemedixon34@msn.com
April 2007