Reply To: Issue E.C.U hyosung gv 125cc – GV125-S EFi
Video sounds good. I hate to say it , Historically Hyosungs since 2000 have always hated pod filter setups , so maybe start by putting the original airbox back and original filter?
Also if there is too many changes to the air system = ECU will not adjust completely as Hyosung themselves set the ECU to expect to run efficiently on its OEM parts including the injectors (i am currently studying upgrade options to the injectors so that they output a little more fuel to stop the bike leaning out on full throttle)
I would also advise doing compression tests after the engine is warm with both spark plugs out. You said it was getting worse , we don’t know if your compression is getting lower (due to bike leaning out & running hotter from that air system change , thus piston ring woes likely) . Maybe on rainy days , some wet air was sucked in to the engine over time (it looks exposed)
Just some thoughts here , keep us postedon that video situation