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750 K2 Strip & Rebuild - help please
taysidedragon:
--- Quote from: Trigger on March 31, 2022, 03:28:34 PM ---You just use a center punch at 3 points ;)
--- End quote ---
Are the balls a slight interference fit, so they seal when tapped in to place. The peening just stops them being vibrated or pushed out?
Trigger:
--- Quote from: taysidedragon on March 31, 2022, 04:14:55 PM ---
--- Quote from: Trigger on March 31, 2022, 03:28:34 PM ---You just use a center punch at 3 points ;)
--- End quote ---
Are the balls a slight interference fit, so they seal when tapped in to place. The peening just stops them being vibrated or pushed out?
--- End quote ---
Tell me something i don't know, and i don't want to know what you had for breakfast ;D ;D ;D
Once out it, is always good practice to replace them with grub screws and do not run the tap all the way though, only to the seating ledge ;)
Lobo:
…Nige, page #2 of this thread has a pic of the 3 punch marks. Patently done on a Monday morning after a heavy weekend on the saki….
K2-K6:
Yes simon I saw that and thought it was perhaps done later. As you say maybe a Monday morning after heavy weekend.
It's more me with an aversion to stress raisers I suppose. Original background training during which if we were just paranoid about potential stress point, then could be considered a bit of a lightweight in engineering terms ;D
Point holes like that, thread peaks in stressed structures, no radius in tight machined corners all give the hee-b-gee-bees in stress terms.
Guess as a production item Honda specified the crank with plenty of meat on it to make it reliable.
I've seen them closed in the way I describe, but can't immediately remember which crank it was.
Lobo:
Yup, stress / fatigue in engineering more and more to the fore. My bil been very involved with live data vibration monitoring in helicopters - big business now. You have to wonder how the early Comets made it through to production - surely someone might have observed, “er, that radius looks a little tight given the fuselage will be pumped up & down like a balloon over its life….†An interesting story that one.
I digress. Ok, a bit nerdy this one, my engine refurb has morphed into the whole bloody bike. Anyways, the Clutch and brake levers. Was the clear plastic covering intended to be taken off in the pdi. And if not, why is it there? Was it on both levers? Notably the DSS / Yamiya OEM offerings don’t appear to incorporate it. (I ask because I intend to trial clear heat-shrink over the levers. My mint sandcast, which has been my go-to, has it only on one lever…. it seems I may have to return it 😂)
Ta.
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