well, i did, 72, 70, and now a 66...still same problem....if i gass it all the way, it really bogs, but if i go 3/5ths of the way, it will go up to about same speed as before....i did a shitty plug chop on the way home - i got it to top speed on 1 block then killed the engine, darker mocha color on spark plug (not a new plug) - should i keep going down?
I thought going with bigger bing would mean going to a bigger jet?