I was asked if the M8 inserts would fit into the sub frame.
My knee jerk reaction was yes but I wanted to be sure so...
I had a sub frame that had a hole so wallered out that a M6 insert fell through the hole
Obviously that wasn't gonna work
Looking at the next pic it appears as if there is enough room.

- KX GURU RACING KX500 SUB FRAME REPAIR 101.jpg (244.51 KiB) Viewed 7715 times

- KX GURU RACING KX500 SUB FRAME REPAIR 102.jpg (186.85 KiB) Viewed 7715 times
Perfect... The big drawback is the oddball size bolt but better that than some of the back yard repairs I have seen employed

- KX GURU RACING KX500 SUB FRAME REPAIR 103.jpg (180.95 KiB) Viewed 7715 times
If bikes are for kids I'll never grow up.