Topic: question about casting holes on engine case/Hondaman and guru's

[paddy paul]

 I was having my morning coffee, looking at my 750 and got to wondering what are the holes that are cast into the upper and lower case for, on the right side by the front motor mount  there is one that is also cast into the upper case on the left,  it allmost looks like there should be a bolt in it, is this part of the casting process, for a mount that they never used,  custom Honda engine stand? anybody have an idea.

[Mark M]

Production line lifting mounts?

[DH]

Alignment dowel hole for the upper and lower case halves? (one on the right)

[754]

 I think they are index holes for when the cases are machined..

[CycleRanger]

I think they are index holes for when the cases are machined..

Winner!

[754]

 If I remember right , Honda bult machinery to do the 750 case machining in 1 process..and were the first in motorcycling to do so..

 Raw cases go in, finished sets come out.. all  or most perfect.. very low rejection rate..  It may be a combo of machines with transfer stations between so no human handles it. It may be called cell manufacturing and was a very early application of it.

 Probably went in use when they got the first diecast cases..

[paddy paul]

thank you,