scored piston skirt ??

Hi guys
i just got the piston out of a non starting low compression (75 psi) aprilia atlantic 125 maxi scooter
it has scoring on the skirt and the top comression ring seemed stuck on one side .. but with a little force it came out.

why did this happen and would this cause the low compression, and should i just buy a new piston and rings ?

the cylinder looks ok, in fact i still see some cross hatching in there, no real scoring..
thanks rob

 

i can get a new piston and rings etc for £55.75 here seems good to me ?

 

yeah change it mate, have you measured your barrel?

 

no mate, not measured it, my micromiter is analogue, not too precise, i can still see honing marks tho, thats got to be a good thing right ?.. would it cost much to rehone ?
cheers rob

 

we charge about 50 pound to do a hone at work, probably half that in the uk im guessing

 

You can buy a hone for less than that and then you're sorted for life. but if you walk into a decent garage with the barrel, they should do it for you then and there for a fiver. it´s no effort at all.

 

theres your answer, i thought our price would be a bit more than what you guys pay!

 

ok so i just looked further into honing.. i thought it was regrinding the cylinder bore.. i guess thats a rebore ?
honing looks easy ( thanks youtube) i think il just get the kit...

thanks Guys, i really appreciate all your help
cheers Rob