kx 125 rod question

i was wondering if anyone knew if there was a difference between cranks hotrods lists '78 thru '87 as cr103 and the '92 - '93 as cr103a . i am gonna be rebuilding a crank and was told i could use either years was wondering why if the rods are the same dimensions why does hotrods have the 92/93 denoted with the a in the part # is there a difference?

http://www.mitaka.co.uk/MDP.htm

 

Looks like the rods are the same so there must be a difference with the crank halves.  Compare part numbers on the Kawasaki site.

ahh okay i am going to rebuild a kwacker street smoker 1990 kr1s 250 and those are the rods can use in the build.

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