HI,again flew the DL 50 in the GP Patty last night. air temp was +27C, a beautiful evening in Winnipeg.
1st flight last night was with the tapered NGK plug.
The high speed miss was gone but had a bit of a rich burble on full open, a lot better than it was on the weekend.
I then switched to a Denso plug (flying buddy is using them on a G26), the result was less of a burble with no needle tweaking.
I then leaned the high speed needle a hair each time, the the motor is now running nice, with a bit of high speed burble.

I could probably have leaned out the high speed burble out but since the engine is new (~ 12 flights) I did not wasn’t to push it.

I also gave the low end needle a bit lean and the the throttle transitition is much much better.

cheers - ken