Misterious Nightmare Tc250

Dear friends!

First of all sorry for my bad english im from Hungary.

I have a TE350 '91 and TC250 '06.

The nightmare is began at a months ago when i seen this not working TC250 2006 on Facebook marketplace.

I bought them sadly but i have to bought because really nice bike.

The problem with my tc is that not started at all. Only when you WOT 2x (AP) and try to kick have a massive kicback only and have a detonation 1x. We try to pull in 2-3 gear. Nothing at all. Im car mechanic i checked: Compression: 9.5Bar, Carb and AP is working the spark have gas on it. Timing checked. Valve clearance adjusted with shim, The ignition is powerful visionable and hearable. 3weeks ago i take to bike mechanic. The mechanic is checked everything like me and not found anything. Nobody knows what the problem is. One people say have an ignition but on wrong time. Okay but i dont found anything on the manual for adjusting ignition. I know cdi is do it this thing but maybe cdi fault??? I dont want to spend 250€ for nothing if not neccesary. Or stator maybe need adjusted? Or any full other problem not ignition? Anybody have any idea? We out of stock.
Thank you!

Hi check the impulse coil wire concetion etc. and clean the carburator do you have a e /starter ?

Have you replaced the sparkplug? Had a similar issue with an unrelated model where the seal between the ceramic and the steel body went bad and wouldn't let the bike fire. Original plug to the bike that was about 4 years old.