Change the heat range on those plugs may need a hotter Or colder plug.If that clifford is one of the Older(first kind) It may have ribs in it under the carb. If so remove at 3 of them.You can reach in the intake runner and grind them do smooth to the floor. The runners worked to well and would lean out 3&4.
Larry,
I checked and my Clifford has those ribs.
Are you saying that will lean out 3-4 at IDLE or at FULL THROTTLE (or both?)
