I haven't ridden the bike with it yet but I idled the bike for about 2 minutes, which was all the longer it took for the water temp to hit 175 according to the gauge. Anyway I think it is a neat little toy, that only added a couple ounces to the bike and runs on it's own battery so I was ok with it. It also mounts to the bars real easy and clean and is easy to read. Anyway I would recomend it if anyone is curious about their engine temp, it's a lot easier than the inline dial type, thats for sure! I unpluged it thats why it reads LL.L.