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Post by JA-Moo on Mar 11, 2016 12:23:30 GMT -5
I don't see how in the world you can take two machined pieces and not line bore the holes.
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Post by Ned on Mar 11, 2016 12:36:55 GMT -5
I don't see how in the world you can take two machined pieces and not line bore the holes. +1
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Post by Tripnut on Mar 11, 2016 12:53:38 GMT -5
I can't see it either, would have thought it was easier to do that than try to get it even close any other way!!
Surely they would match the case halves line bore the journals for the gearbox and the crank all at the same time on a machine with all the bores jigged, so they knew the gearbox, crank etc were all in line and the right distance apart. I'm not sure there is any other way, the more you think about it the more unlikely any other industrial process would be chosen. Especially in the 70's.
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Post by Walms on Mar 11, 2016 13:05:21 GMT -5
"line boring" would have a headstock and tail stock support and the cutter head is guided along a mandrel as it cuts. Bored journals would be made from a conventional boring bar, supported only by the headstock. Both are going to bore a true. Line boring is preferred because less deflection of the cutter, which means it's easier to hit your tolerance, it doesn't mean both couldn't get the job done though.
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Post by lc on Mar 11, 2016 22:56:50 GMT -5
Apparently the centerline of the small bore main bearings is often out of line from the centerline of the larger bearings by .0014in or more on the H series engine cases. Likely two boring bars set at differing diameters were used during manufacture.
Don't forget these bikes were built as a cheap disposable bike only meant to last a few years
J
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Post by Walms on Mar 12, 2016 6:14:23 GMT -5
2 different diameters does not imply 2 setups but if 1 journal is commonly out by .0015", Mother Kaw had some poor manufacturing practices.
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Post by Tripnut on Mar 12, 2016 6:50:41 GMT -5
I we all have Kawasaki's so we all know that Kawasaki didn't exactly put much love into the product. Too busy loving the big ships and cranes.
We are in love with cheap disposable marketing tools, bit like Buzz Lightyear toys and nobody expects them to last forever.
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Post by Deleted on Mar 12, 2016 8:17:30 GMT -5
Buy a British bike from the mid to late 1960s and the Kawasaki quality of manufacture goes way up. LOL Are historical manufacturing theories manufactured with a boring bar or razz-reamer?
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Post by Tripnut on Mar 12, 2016 9:30:09 GMT -5
Why do you think I always bought Jap apart from the Harley and that is even worse than any brit bike. The Harley is a bit of a counterbalance to the triples and the R1 because it couldn't be any more different. Why do I always feel the need to justify getting a Harley?
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Post by sf on Mar 12, 2016 9:58:19 GMT -5
Why do I always feel the need to justify getting a Harley? We all know who has the most toys at the end wins boys......
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Post by Deleted on Mar 12, 2016 15:05:17 GMT -5
We call Harleys either 'Fergies' or 'Fergusons' around here. Simply put they are a motorcycle made from a parted out tractor.
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Post by Tripnut on Mar 12, 2016 16:23:12 GMT -5
Agreed but it's the polar opposite to a two stroke triple and I like being able to ride different types of bike. I'm not racist against any type of bike. Always said I'd never be old and dumb enough to get a Harley.
Now I am!!
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