chain issues

[13bturbofc]

OK I'm starting a new thread cause my old one got so filled with bullshit no one wants to read to the end to see my questions..so here's my problem i swapped out my +12 swing arm and put the stocker back on so i went and bought a new chain and stock gearing sprockets..the new chain came with 120 links so i bought a chain breaker tool and was told the stock chain has 104 links so being the first time Ive done this i didn't bother test fitting the chain cause its supposed to only need 104 links so first off i counted out 104 links and went to use the chain breaker and pressed the pins out the pins pressed out and the end plate came off but the pins would NOT push through the other end so i was fucked so i tried again and it did the same thing so i said fuck it and tried the tool on the old chain and it worked fine so i counted 104 links and cut it and went to put it on and its like 4 links too short..so WTF I'm pissed!! did anyone ever buy a chain that the tool wouldn't work on? and why the hell wont it work with 104 links its all stock it should fit..should i go buy a new high quality chain? i really need to get this thing together so any help would be greatly appreciated