I have a cnc 11 tooth tensioner but without a half link chain is waaaay to loose to use the motor mounted one but if I pull a link chain is about 3\16 too short and I have to use the stock tensioner there just isn't an in-between without one idk my 1st half link exploded on my first good ride and I had to peddle about 2.miles home it hit my case and exploded cotter pin fell out or broke and pin wiggled loose scared the sh*t outta me since I was doing about 40
But from what your telling me they all explode which makes me sad