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Post by urbantangleweed on May 12, 2022 7:08:52 GMT 1
Just pondering this and wondered what the forum knowledgebase think of it, but if you have a primary gear marked "91", over say 10,000 miles of use, presumably the wear (albeit minimal) that would occur will technically change the number? I'd guess if it does, then that primary number would effectively "grow", so after 10,000 miles of use it might now be a 92 or 93, after 20,000 miles, maybe 93 or 94?
Or are these gears so hard, any wear is actually virtually non-existent and the marked number never really changes?
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Post by stevesmith on May 12, 2022 13:49:52 GMT 1
Just pondering this and wondered what the forum knowledgebase think of it, but if you have a primary gear marked "91", over say 10,000 miles of use, presumably the wear (albeit minimal) that would occur will technically change the number? I'd guess if it does, then that primary number would effectively "grow", so after 10,000 miles of use it might now be a 92 or 93, after 20,000 miles, maybe 93 or 94? Or are these gears so hard, any wear is actually virtually non-existent and the marked number never really changes? I can see where you are coming from,but from a personal preference I would stick to what Yamaha recommend, and buy a matched set. Also, if the primary drive gear has worn ,then surely the primary gear must have worn at the same rate? |
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Post by midlifecrisisrd on May 12, 2022 15:36:34 GMT 1
They won't wear evenly as the primary gear will do more rpm than the driven gear so would wear out faster
Steve
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Post by Tobyjugs on May 12, 2022 16:23:09 GMT 1
I've measured lots of primary gear wheels now and can't make the connection your are thinking about.
I am starting to wonder if it is more to do with the angle of the helix.
I just keep to the 155 rule and note the gear wheel clearance every time.
Another factor to take into consideration would be the deflection on the end of the crankshaft as well.
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