Hello,
I have gs500 2002 32kw and I need replace my damagedd connecting rod, but there is old version with code 12160-44100 and new with code 12160-44101
Please anyone know difference between this two versions and where I  can found what version I have ?

You need a new motor, con rod isn't like replacing a light bulb. A whole rebuild with likely cyl sleeves will be needed, and a motor is cheaper, by maybe 3 fold, and not to mention usually rebuilds are filled with screw up's. As well as parts you can no longer get or parts that were never available.
Cool.
Buddha.

Thanks for answer - I am making rebuild and found that.
Next engine - I must say no, because new engine is 500-600 EUR and I want to sell the bike for around 1000-1200 EUR - in this September.
Change anything moving part in engine is only about weight and correct tolerance, so I will balance the crankshaft and make the same weight left and right connecting rod with the piston weight.

OK fine usually in the US a new motor is 300 and a rebuild is 1000+
Cool.
Buddha.

less headache for a swap. i agree. but location can have bearing on cost too. so i can see where hes coming from on this.
i wish you the best.
and take pics and make a build thread. please. these are interesting to watch and observe.
Aaron