If you feel like your socket will strip the hex, tri with another socket (the ones six sided are better than these star shaped. And you can grind the chamfrer off to have more contact area)
It is not as bad as picture formed in my mind after reading this.
Yes, frame will have a smash from triple clamp contact. If it is too scary, it will need weld repair. If not, fit a pvc pipe section over it.
Front brake and clutch(oem Formula) isn't good. Try negotiate a price discount. So, after all, if it bother you, you can change them.
Good reliable motor, modern good front forks, tubeless rear wheel, easy parts availability, light manobrable front end....sherco bikes have beeing evoluting and 7 years will show improvement for sure.
Flywheel weight removal.
in Gas Gas
Posted
Seems like this kind of flywheel
https://www.steahlyoffroad.com/pub/media/wysiwyg/gray-instructions.pdf