Hello together !!! I have the following problem with my MT8. At the lower speeds and when it is cold, it runs normally. But if I give you a short full load for acceleration or drive at high speed, then it runs quite funny. That sounds like if it is somehow throttled. If I go off the gas or give only half gas, then it turns normally up. The candle is also always full of black soot after driving. That’s why I wanted a candle with However, a Götz employee advised me not to do that. He said that the mill or engine could get too hot. According to the workshop manual, however, a spark plug would still have to go up to a degree of thermal value. At the moment I had a NGK BR8HS and a NGK B8HS in it. At the second one one might think that it is better. However, not so right. In the past, there was a Bosch W3AC in it. However, it doesn’t make any more sugar. OK, it’s also 12 years old. Thank you for your contributions Chreschi