Hello from Wiltshire

[Bryanj]

Its not the blades that break its the tensioner bolt in the front of the engine! As to the "horseshoe" the chain, if loose, rubs on the tensioner causing damage at the pivot point and the pivot stops moving freely. If you have the engine apart it is always worth making sure that this pivots very freely

[royhall]

Thanks Bryan. I spotted that on the strip down, the bolt was very tight to get out. Have got another on order at the moment, so cant start the rebuild until it arrives. Should be okay to reuse the guide blades then, as they look okay?