Scraping sound when moving kickstart li150 special

Hi all I have 2 problems
1) when trying to kick over my series 3 li150 I can hear a scraping from the engine area, tried moving the piston with the fly wheel and no noise (As I thought maybe a piston ring had broken), so probs gearing, clutch or is there any other area I should check first...it kicked over fine for a couple of weeks then the noise started? Or should i remove chain case and chain which may give me more of an idea where it's coming from.
2) on another scoot I have dismantled the engine but when starting to rebuild I stupidly did not centre punch the gear selector so not sure of position it should go back in with the gears. Is there a method of getting this correct again or just trial and error.
1) when trying to kick over my series 3 li150 I can hear a scraping from the engine area, tried moving the piston with the fly wheel and no noise (As I thought maybe a piston ring had broken), so probs gearing, clutch or is there any other area I should check first...it kicked over fine for a couple of weeks then the noise started? Or should i remove chain case and chain which may give me more of an idea where it's coming from.
2) on another scoot I have dismantled the engine but when starting to rebuild I stupidly did not centre punch the gear selector so not sure of position it should go back in with the gears. Is there a method of getting this correct again or just trial and error.