Hello Patrick
It looks like you are not going for a rebore then? If not, you must be really careful that there isn't a step worn in the bores at the top of the piston ring travel. Even the slightest step is a problem. What happens is, if you replace your piston rings or mess about with the stroke, there is a danger that the first time you run the engine the new rings hit the step. At best they will break dropping bits of piston ring everywhere IN the engine. Not good when it is running.
If you are using the old rings it is not a problem as there will be a corresponding step worn in the ring which will fit the step in the bore. Unless you are changing the crankshaft throw of course....
Also, if you change the rings you must get the bores honed or the new rings will not bed in properly.
Just my 5 penneth worth....
Good luck!
Robin
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