Need help from supertuners reed valve issues!

Like it says, I rebuilt my 66 cc new gaskets and seals, I run a puch head and a dellorto 16mm phbg with a rock soild reed kit. I am running a sbp pipe. I have previously ran withot the reeds with the pipe/carb/head setup for 2000 miles no problem. This is going to be a long/multiple post so hang in there.

I was running a 60 main and 40 pilot previously and I changed the main to start rich with, I believe an 80 to start. Fired it up on 20-1 oil gas mix for break in. Changed idle to #38 and 1 1/2 turns, idles smooth. W3 needle but left it on top (#1 groove) flat etc through midrange and 4 stroking blubberly on main jet. I am running a cyinder head temp gauge(cht) And the temps wer getting up around 380 f on the hill i use to provide a full pull followed by a proper plug chop. Came home plug black BUT their are light cylinder score marks- crap. Started with a new cylinder and gaskets and opened up needle to #3, nice and blubbery/safe/4 stroking. Ok no problems but I ordered newer richer needles so I sarted working on jetting the mains.
Started jetting down in small increments, plug went from black to grey and than strted seeing dark chocolate brown BUT the dark brown was only on the center porcelain and a little of the groundsrap but not on the bottom area around the threads. Watched my cht and it was making good power continued jetting down with proper plug chops then i heard a small rattle and yes when i pulled the head it was small balls of alumium off of head BUT the plug is stall chocolate brown.

Continued in next post

I checked with Dellorto to see what their carb angles are allowed and they say 40 degrees max, I am running 30 degrees. To further add more info I have machined 2 vetical slots on the intake side of the piston aproximately 1/4 wide with a 1/4'' wide wide bridge between the 2 as well and have nice radius made by the milling cutter. I am almost running a full 360 degrees intake duration. Their are no leaks anywhere i spayed with wd40 not a single change in rpm. My problem is that the plug is not accurately showing me what is going on, the carb is clean and running perfectly but I have scored(allbeit lightly) 2 cylinders and have no idea why. Is it the piston that is causing this issue?? My head and pston show no carbon after an hour and it can't be washing from too much fuel as i jetted down and its starting to ball aluminum yet the plug (which is a new ngk b6s) shows no indication.
I do a nice cleanup/matching /blending on all my cylinders and my head runs about 160 psi cranking pressure.

I am completely stumped so if anyone can point me in the right direction or needs further info from me to help I will provide it.I am all ears as I have ground to a stop.

Thanks a bunch.

Eureka!! some problems found. Intake port Must be machined, found the post somewhere as the top reed hits the top of intake port AND piston was incorrectly machined along with possibly too hot of sparkplug. Stay tuned.....

Yes running an 8 heat range plug and yes 170 psi with throttle open on premium fuel. Will be machining a new piston this week for the intake slots, as it sits I am running 360 degree intake , by any chance are you able to translate that timing into an intake window length????

Cheers.

I don't use windows I use 2 vertical slots with a 6mm bridge between the two.

Some good reading!! One question though??? Why will the plug be black if close to jetted correctly??? Why Can't the plug be read as per usual I am puzzled?? Btw I am running a stock ignition with the woodruff key machined to retard the timing 3 degrees static only as I am not able to find an aftermarket ignition right now as the jaguar cdi is sold out.... Thanks for the help so far.