Some are cutting the gas pedal and re-welding it to get full throttle and others are taking a 5/8 I D heater hose and sliding it over the pin that the throttle cable rides on. This pin is located at the top of the gas pedal and underneath it. You can check full throttle by pulling of the air supply line from filter to engine and look and see if throttle is wide open or not when you puxh all the way down on pedal.I don't know if this was really a problem, but just another way to get all you can get.
check it by pushing pedal to the floor then pull on the lead cable end to see if you have slack in the cable you may also hear the throttle blade kind of klick as it opens further mine had about 3/8 inch slack
all I did was the 5/8 heater hose thing but today I'm going to build an offset bushing to push on the cable as this will allow me to adjust and tune in the max throttle opening .... at least that is the plan. I'll take some pics if it works out
ok I couldn't or was too lazy to find a piece of aluminum to make and adjuster BUT I figured out that along with the hose I needed to remove a corner of the center floor piece as the throttle pedal arm was hitting it as well I shaved a bit off of the arm to allow more travel and voila!! full throttle
notice the hose with the green line through it
the corner of the floor cut off and the underside of the throttle arm shaved down
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