I have a 1968 Bonneville and I want to replace the race ball bearings with a conversion roller type. My question is where do you get the best quality bearing for this conversion and any tips on the change over would be helpful. Also I may have to run a chaser tap through the spindle cap holes in the bottom member (bolt holes that hold the front axle to the forks). My question is what type of bolt is used in a 68, whitworth, unified course,C.E.I. etc. Thank you very much for the help.:-)

Most of the internet suppliers I've shopped offer kits for stock applications.When I convert any steering stem bearings to tapered rollers,I found it easiest to go to www.timken.com and select my bearings by dimension. You need to measure the neck ID and the stem OD (should be 7/8") I use brass sheet stock to make shims up to .060" if the closest bearing race OD is still smaller than the neck. Of course it is better to machine the neck out to the next bigger size. The cap studs on my 71 Bonnie forks are all UNF but the older ones could be Whitworth. Klemf's British parts and Rask Cycle have treated me well when i shop online. Good luck and happy motoring! Pat