hey guys, I just got a 1972 125 johnny. It starts brilliantly every time first time, but it idles really high. The throttle linkage is as far back as it can go and it still is idling at around 2600. It was in storage for a while and I've done a few minor things, plugs, sea foam, change oil, that sort of thing. But this idle is driving me up the wall. How would one adjust the idle down to normal spec? any help would do, thanks alot .