what cam is this...?

[chrisd]

it has ja65   ,   594-1258 stamped on it, also has 110 and 23.
also are 74.985 pistons standard ?
cheers chris

[chrisd]

cheers rae thats a big help ,im just about to rebuild my g motor but apparently some things have been changed am im not sure what , do you know about the cam at all

[chrisd]

just incase someone else has a cam with these number on its a piper cam specially designed for jabbasport
cheers chris