My guibo is old and cracking, so I want to replace it. I have a 5-speed built 11/01. When I look it up in realoem, it shows two different part#s: 26111229360 and 26117511454. One says LK=96MM and the other says LK=96MM/12. The note says LK=bolt hole. These bolts are nowhere near 3" in diameter, so what is the difference between these two?