piston markings

[morgy]

Hi 

Do standard Yamaha piston all have the Arrow, Letter L and the size ID on the piston crown?   I've seen a set that have 25 on them.. I would have thought it would either be .25 or 0.25 or 2.5 but i can't see any decimal point anywhere..  owner is saying the bore sizes are 64,3 up to 64,4mm 


piston by mark morgan, on Flickr

[midlifecrisisrd]

25 is 0.25mm over

If he's measuring 64.3- 64.4 I'd say it also needs bored

2.5mm over would have 250 on them

Steve