Keeping the trailboss need help identifying piston size

[dz]

Hello. Took the engine out of my polaris 250 trail boss. I have a marking of F on the piston which means front but I also have 5W. Does that mean I am .5mm oversize? Don't have access to a bore gauge right now, but I'm trying. Thanks.

[oldskool83]

take it to a dealer to be safe. they wont charge to tell u the size

[muddog]

get rid of the trailboss they're pieces of s h i t ive worked on a bunch of them none of them were worth keeping.
just my $0.02