unsure at problem can anyone help can hear noice from bore

basically got a speedfight stage 6 sport 70 cc carb variator clutch drive face pipe etc its all running great starts fine and stuff but wen i slow down and my ped still moving on momentom i have noticed tht i can hear like my pistone going up and down as if its scratching or something dunno not like a scatching sound but i can just hear it going up and down this normally doesnt happen does anyone no wats happening is my crank fucked lack of oil i dunno please comment

 

oooooh that aint good, for gods sake dont sttart it or run it!!!!
As you said sounds like lack of lube.
Have u checked ur oil? Ya best bet is gonna be to take your top end off and assess the damage if there is any.
If there is then you wanna make sure you havent got loads of metal shaving in ya crankcase or ur gonna be in big trouble, depending on the damage done really

 

had the same problem and it just slowly started losing compression then died lol.. with mine the little pin thing that holds the ring in place had done a runner so the piston ring was just spinning around

 

thankyou guys for them comments will take my bore off today aand do tht i have a full tank of oil but there could be a leek ill comment later thanks guys

 

could also be an air lock in the oil system, try bleeding it

 

were bouts you from? could come and help