I have a tki belt drive on my 14 m8000 and the speed sensor never worked since i installed it. Had it for 2 years and never could remember to call and ask them about it. Got around to it last week and with no hesitations he said he will send me a new updated cover no cost. This day and age its nice to have companies that stand by there product like this! And they are somewhat local for us out of billings MT. The belt drive has been awesome as well. 2 full seasons on a tubo sled and has worked flawless! If your looking for a belt drive give them a look for sure!