Been through 3 of these. The one on my 125 still works after over 5 years. The two I have put on my 250f and 250 2stroke, not so well. The 250f made it to just a tad over 130 hours then it knocked itself crazy. The meter on my 250sx made it to just over 18 hours before it went bonkers. It seemed after we had to disconnect it for a regional qualifier, it never was the same afterwords. Not sure if I would buy this specific one again. Seems like it may be hit or miss.