Hi Paul; it wasn't a bearing noise, as I explained to Jefffrombrisbane it was a sound I had not heard before, but once I had used it a bit I think that noise had gone, but the poor thing was copping a real hiding doing what it had to do. I will give it a hone and new rings tomorrow and see what happens. I have over 40 motors here that have spark but will not give the slightest hint of firing even with starter fluid. All these motors I test on my test bench using the one carby so that eliminates the fueling side of it and they all test fine with spark and I usually test with the one spark plug so that eliminates the plug as being an issue