DT 125 Barrel Rebore?

[goldmansean]

Hi, im looking to get my recently brought spare DT125R barrel rebored, it is the 3MB00 Type, it dosent include the powervalve or anything just the ally barrel, the bore in it right now is about 57.35 i think on average measured using a set of calipers, if i get it rebored will the powervalve be okay when i swap this head over to my bike and put it in, ive heard in places that it will sometimes overhang and i might have to shave some of it off.

hopefully it is possible for me to bore this, the score inside is around 0.3 to 0.5 mm deep. and ive seen pistons going up to 59mm so this should be fine.

other people on here probably have a lot more knowledge than me so any help would be appreciated.

thanks, Alfie.

[binge]

Used to run the 2RK engine in a pit bike years ago, and due to it being a track bike, it would seize up every now and then.
I re-bored it about 3 or 4 times and had it up to a +1.5mm piston in the end. PV cleared fine.