running, but to well!!

just fitted a new pierburg carb and fuel lines, started it up and all is good! apart from the revs are racing away! how do i turn them down??

I have found the problem. My throttle cable is sticking.  :roll: when the carb came I needed swap the piece over that joins the cable to the carb. It came with a red half moon piece on the carb, so I loosened the choke undone the 13mm bolt and removed it. Then slid my all in one back on. Now it's stuck half open untill I force it back and it runs great!