If your using a Fox fork you can buy spacers in 5mm increments (5, 10 and 20) and reduce the travel. Fox has a god how to manual on their web page or you can find info on here. I have changed my F29 from 80mm to 100mm and my Float 140 to 120mm, each job takes about 20-30 minutes.
One tip is to get a cooking syringe for adding oil back to the lower leg, the syringe has measurments on ot and the needle makes it easy to inject the oil. I cut off the sharp part to make it a blunt tip.
I believe White Brothers uses different coils (and maybe different top out spacers) on that model. I had asked about it before picking up an F135 so that I could use it shortened before moving it to another frame.
On the air forks' conversion kit they have a longer top out spacer as well as a spacer which replaces the three small negative springs and shims.
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