Hi all, I've got an Ultrex 36 volt on my 521. I had a warranty issue with my pedal sensor a couple months ago and since replacement, I've noticed a decrease in power. With the setting on 10, I only get around 2 mph. Before I was getting almost 6 mph. I'm taking it to the MK service center tomorrow but thought I'd take a moment to ask for any ideas and/or advice as to what may have been happening with anyone's TM. Thanks in advance, Rick