Been having a think, Chris. Could some kind of baffle be fitted behind the roller bearing, to stop needles going into the bearing if the needle roller fails? It would have to have very small holes in to allow oil through, but not big enough for needles to pass through.
I'm planning to have a run up to one of your rallies this year. Just as a visitor though. Think you'll get this side of the border, George? Be good to see some of you Scots at the Hethersgill rally at Carlisle airport. May 3rd.
I fitted electronic ignition to my Mountfield last year. Not a kit like that and not sure if it would fit a Kohler. So I'm not really much help, except to say I was happy with the result. See my post "B&S 11hp April '14".
Got some more bits painted to day. Governor arm, clutch plate and some small brackets. Also drive pulley. That and clutch assembly just fitted tonight.