Have a 1984 DT60. You can read a previous thread I have that describes the problem/scenario completely. The motor ran perfect several weeks ago, but then started to loose rpms and speed to where you will try to initally accelerate the first time in the day and it would take off normally, then the rpms plummit to probably around 1500 and you couldn't get it to go again at high speed, although it runs fairly smooth at the slow speed it runs and idles smooth. It starts very easy as well. I just replaced the fuel pump diaphram kit as someone suggested this was the problem. It wasn't! Before I replaced it, it seemed the plugs got pretty wet, now they seem relatively dry. Now it won't even accelerate at first, it just bogs/or won't accelerate any faster than a fast idle/troll speed. Do you think the carbs need to be taken apart? Is it possible the high speed jets have plugged-is there a way to clean these without completely removing the carbs? or could it be a rev/overheat sensor kicking in/faulty? or something else electrical? Is there a way to test or bypass/fool the senor that goes into the head to rule that out?
