Hey guys I'm working on a usd swap for my bike which is a 96 XR600R and swapping it to an 03 CRF450 fork setup. Now the problem is I keep reading about machining down the stem to fit the R's bearings but I just don't see how that will work. It looks to me like when you machine down the stem it will take away the threads from the crf450 stem. Is there a bearing conversion for this? I've heard about all balls having a swap lot bit I can't seem to find it on there site. Any ideas here guys? I've seen a lot of them done to these bikes but haven't seen a solid write up on one just the finished products. Any help would be wonderful thanks!