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Bore size
Posted: Thu Jan 16, 2014 8:51 pm
by fillpoke
I took the head off my 1098cc engine today to see if the block had been rebored. I expected to see std, +10, +20 etc stamped on the piston crown. However it has nothing like this which would indicate if the engine had been rebored. Has anybody any ideas? I'll attach a pic of the piston crown.[frame]
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Re: Bore size
Posted: Thu Jan 16, 2014 9:13 pm
by les
I would take it as standard, to double check you would have to measure the bore with an internal micrometer.
Re: Bore size
Posted: Thu Jan 16, 2014 9:31 pm
by bmcecosse
2nd vote for that - no marking = std bore.
Re: Bore size
Posted: Fri Jan 17, 2014 9:32 am
by philthehill
Agree with the above.
See Minor wksp manual section AAA4 for details.
The number 3 stamped on the piston is the grading number as pistons are graded as to their fit in the bore.
Re: Bore size
Posted: Fri Jan 17, 2014 8:38 pm
by fillpoke
Many thanks for your replies. I had guessed that in the absence of any marking it was probably standard. But it was only a guess. Now I know for sure. Cheers.