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Richard Blackburn

It is difficult to tell with your crankcase doors as it looks like they have been made, I believe (and refering to engine Y82xx I’ve got) it would have had cast doors with 6 radial webs going to a central pip that the strap pushes on.

Either way its easy to check, just take the doors off and measure the width of the conrod big end eye. I’d suggest you take the doors off anyway and poke about in the lower oil well with a magnet (the type on a telescopic rod for fishing lost bolts out of the flywheel area work well!!) to ensure it is not full of metal particles and the BE bearing plates are not dished and bright blue. Also check the crankpin bolts are tight, the last engine I got they were both hand tight, the owner had been using it for a year like that!