I'm getting this low pitched moan only when coming down into the 4-5000 rpm range and then feathering back up. It goes away at about 5000 and never does it if I go back to idle and feather up to speed. I can't make it do it going up just coming down to about clutch engagement r's and slowly back up. Does not sound or feel like any of the three are missing, feels smooth. Otherwise it runs/starts great. Have taken plug checks at 6000 and they look they way I like them. Sled is stock.
Carbs are set at factory specs except the air screw is out a bit over two to stop the idle hang.
It sounds like a loud purr and instantly goes away if I hit it. Seems like something isn't quite right.
Any ideas ?
thanks
Steve
Carbs are set at factory specs except the air screw is out a bit over two to stop the idle hang.
It sounds like a loud purr and instantly goes away if I hit it. Seems like something isn't quite right.
Any ideas ?
thanks
Steve