YES WE HAVE SEVERAL YEARS THAT COME INTO ARE SHOP WE ADD A THROTTLE STOP TO IT WHEN THEY USE THE DUMP BODY OR VAC PART OF TRUCK IT IS A SIMPLE CABLE THAT IS USED LIKE ON LAWN MOWERS AND WHEN PULLED ONLY ALOWS THE T.P TO HAVE SLIGHT OPENING AROUND 1800RPM THE O... Login to read more.