[Rick Parker]

Make absolutely sure everything is syncronized correctly, the inter connecting links are adjusted and that the accelerator pump cams are lubricated sparingly along with the roller that the accelerator pump cam rides on. If the rpm fluctuation still continues verify that the throttle plates all close completely. Lastly the leather bearing seals may be leaking air, if they are dried up they will need to be replaced or replace the bearings with the sealed type. You can sometimes feel a leak at the bearing while it is idleing.