Yamaha ST

[mab66]

Hi all last year I bought a hardnine Haibike , with it I pull a trailer with two small dogs mainly on the flat with occasional hills. As my fitness has improved I found myself hitting the 16mph restriction on it quite quickly , which is annoying. So in my wisdom I decided to buy a chip. After doing some reading I decided to put the speedbox chip on ,all good for a while , then the bike started to cut out milage flashing loss of power , so I took the chip back of . I read on here to press the light button on handset then two outer at the same time all good for 100 miles , now it's doing the same thing again but straight away , if I turn the unit of and on again the power kicks in soon as hit 4mph cuts out again , please may I ask your opinions or a better re set program, am up in Scotland in Skye with no bike that works , appreciate any help please .