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D = 3.9mm x 75mm long
**See extra images for detail of where this drill is used (This size hole goes all the way through the main bearing. Use a 4H8 reamer by hand to make the hole slightly bigger but not all the way through the bearing as you do not want it to touch the crank!) Deburr hole on bearing side
**Tip Drill this hole before oil holes so the bearing can move ! (See SKU 1127398R for main bearing oil holes drill)
Some months ago I bought a set of HB Junior panniers from you (the larger size). & fitted them to my ’81 BMW R100 after packing & modifying the frames as directed by yourselves. Totally successful, & I have been extremely impressed with the HB quality!
Just a quick note to say thank you so much for all the help in getting the parts for my K100. Spent Saturday doing the major service and cooling system hoses, every part was exact. And my neighbour wants his done next so I’ll be in touch again.