I get up to speed hit accel/set and the car takes off like a rocket. Just wants to keep accelerating. i tried several different methods of setting the cruise but more often than not it only sets/takes off with accel/set. I heard something about an amplifier?

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'85 300SD (formerly california emissions)
'08 Chevy Tahoe
'93 Ducati 900 SS
'79 Kawasaki KZ 650
'86 Kawasaki KX 250
'88 Kawasaki KDX200
'71 Hodaka Ace 100
'72 Triumph T100R