Not with the keypad, use display and throttle grip. The Can key is a tool the Tech carries in his truck, it's never left in the lift. Basically a red box with a plug. You can change the first ten parameters without the Can Key. power off truck, hold down horn button while turning on key again. keep holding horn. Look at display, it will scroll betweem hours, codes, parameters. When "P" is showing, release horn button. Now twist grip and let go. You are seeing parameters 1 to 10. Actually you will see all, til 40....but you cannot change the ones over 40 without can key. Par 1 is top speed in slow mode, par 2 is top speed, par 3 is accel rate, Par 4 is decel rate. To change speed, when par 2 or 3 is on, hit the horn button. the Value shown will flash, now twist the handle grip to increase or decrease speed. Be carefull and make note of each parameter before changing. If you mess up things and the truck crawls, or goes too fast, you can put back to normal. A Raymond tech will have it, Do you know any?