[Gothicsera]

I'm sure I posted quite a bit here last year, but must have been my imagination. So hi everyone! I'm based in the UK and last summer I picked up a 2001 EC250 project which was in a poor way. It was burning a lot of transmission oil and had been used as a farm bike for a long time. It ran, but barely when I got it.

Long story short I did a full rebuild on the whole bike including the engine which I rebuilt with all new bearings, piston and cylinder. Boysen carbon reeds, new intake rubber, air filter etc.

I just got it road/trail legal here in the UK yesterday and I'm now trying to get it running properly.

Yesterday it wouldn't start hot without choke, with a 38 pilot and felt lean. Stepped it up to a 42PJ today and it now starts hot and cold nice and easily, first or second kick. But it's still not running great. I get intermittent "ding ding" like letting off the throttle and misfire at 30-35mph in 5th gear. It also feels flat at higher speed and WOT and doesnt seem to want to rev out, like its lean its not breaking up/crackling. But going by others jetting I'm already on the rich side.

It pulls well at low rpm on the trails.

AS1 PWK 38 AG carb with #7 slide
42 pilot
AS 1.5 turns out
180 main
N3EG needle, clip 2nd groove from top
FMF Gnarly pipe and power core muffler
0-500 ft
10-25deg C.

Motul 710 fully synthetic oil at 40:1

I have some other needles, N1EF and N0ZE and have ordered a 40 and 45PJ and 182 and 185 MJ. I have 178 MJ in my existing spares already.

I'm going to have more of a play on some local lanes tomorrow and see if I can do some more low speed testing and work through the whole set up from scratch. But am interested in any thoughts from you guys and experts.

Thanks
Sera