Rigid link from carburettor trottle butterfly to top hole on govenor lever (attached to crankcase). Link with spring goes from speed control lever (if engine is variable speed) or fixed bracket (if fixed speed) to second or third hole down on govenor lever. Only difference is about 100 RPM in top speed. Spring at govenor end.
phil_saunders(a)bigfoot.com
Phil Saunders, August 2009