Post by: Skippernick on 28 October 2018, 08:26:11 pm
Sooo ordered a new nut and locking washer from my dealer and a new 9mm nut turns up. Apparently its all up to date, but why a 9mm nut and not the 12mm nut if there are known problems.
Shall I get a 12mm nut from wemoto?
Cheers
Nick
Post by: fazersharp on 28 October 2018, 08:28:23 pm
Quote
Shall I get a 12mm nut from wemoto?Yes.I am the same as you with no problems but keep an eye on it. I already have my 12mm nut brought from webmoto ready for when I change sprocket and chain. Odd they send the 9mm nut, I think you have to request the 12mm when you order otherwise you get sent the standard I think. Especially if the dealer is clueless or useless, you will get "no mate that is standard" then you have to explain the whole situ.Search on here as you will find the correct part number and they may be able to swap it for you.
Post by: Fazerider on 28 October 2018, 08:41:34 pm
Post by: Anquetil on 29 October 2018, 08:22:17 am
Post by: Anquetil on 29 October 2018, 01:10:46 pm
Post by: darrsi on 29 October 2018, 10:59:58 pm
Post by: darrsi on 29 October 2018, 11:03:28 pm
Not seen that part number before?
My bad, i recognized the first numbers, but not the second part, but after a search there's no other number. :)
Might be the nut/washer kit part number i remember?
Post by: Anquetil on 30 October 2018, 07:00:59 am
Post by: darrsi on 30 October 2018, 12:09:35 pm
Post by: FILZ6 on 30 October 2018, 12:15:05 pm
Post by: Skippernick on 05 November 2018, 08:48:12 pm
Post by: limax2 on 07 November 2018, 10:22:58 am
Post by: His Dudeness on 07 November 2018, 06:19:50 pm
Post by: limax2 on 07 November 2018, 06:46:12 pm
Nice drawing ;) That must have taken some careful measuring. What program did you draw it in?It was done on Autocad 2005.
It does illustrate the extra thread engagement.
Interesting that the counterbore in the new nut is 1mm deeper than the old nut. Made me wonder if with unfavourable build up of tolerances you could get a situation with the old nut where it tightened on the end of the shaft splines rather than on the sprocket. Same would happen if an aftermarket sprocket was a bit thinner than original. Maybe I overthink these things. ;)
Post by: Skippernick on 25 November 2018, 11:42:18 am
Cheers
Nick
Post by: Skippernick on 04 December 2018, 05:07:57 pm
Post by: darrsi on 05 December 2018, 06:44:21 am
So I've got my upgraded nut and it is the right thickness overall, but I wasn't expecting it to be hollowed out in the middle making the thread thickness basically the same as a 9 mm nut. Is this right?
From memory the new nut is flush with the end of the shaft, including the threaded part.
I'm sure it's meant to have more threads otherwise it's all a bit pointless.
Post by: Jules-C on 05 December 2018, 01:58:34 pm
Post by: limax2 on 06 December 2018, 06:22:54 pm
So I've got my upgraded nut and it is the right thickness overall, but I wasn't expecting it to be hollowed out in the middle making the thread thickness basically the same as a 9 mm nut. Is this right?Look at the drawing I posted earlier in this thread. You will see the following.
The 12mm nut is hollowed out 1mm more than the 9mm nut, but when fitted this is all in the are of the undercut on the shaft thread so doesn't effect the thread engagement. On the 9mm nut the nut thread overlaps the shaft thread slightly where the shaft is undercut.
At the outside end the 12mm nut comes to the end of the shaft whereas the 9mm stops short. so you gain about 2mm to 3mm thread engagement above the original approx. 5mm engagement.
Post by: fazersharp on 06 December 2018, 07:12:21 pm
Post by: Skippernick on 06 December 2018, 08:48:36 pm
Ok, I never opened the 9mm nut packet so never realised. Thanks all.
Post by: fazersharp on 06 December 2018, 09:08:58 pm
Fazersharp take the same pic but turn the nut over!Have a search on here I think there was one posted a couple of years ago- my bikes asleep now and I don't want to wake it up otherwise it will want to go out and it looks a bit damp out there
Ok, I never opened the 9mm nut packet so never realised. Thanks all.
Post by: tommyardin on 06 December 2018, 10:56:29 pm
Fazersharp take the same pic but turn the nut over!Have a search on here I think there was one posted a couple of years ago- my bikes asleep now and I don't want to wake it up otherwise it will want to go out and it looks a bit damp out there
Ok, I never opened the 9mm nut packet so never realised. Thanks all.
I would love to show you my nuts.
I hope I do not get PENALISED for this. :eek
Post by: fazersharp on 06 December 2018, 11:30:32 pm
That is a good side by side comparison. You got a very shiny nut compared to mine - is it a genuine yam oneFazersharp take the same pic but turn the nut over!Have a search on here I think there was one posted a couple of years ago- my bikes asleep now and I don't want to wake it up otherwise it will want to go out and it looks a bit damp out there
Ok, I never opened the 9mm nut packet so never realised. Thanks all.
I would love to show you my nuts.
I hope I do not get PENALISED for this. :eek
Post by: tommyardin on 06 December 2018, 11:48:17 pm
Yeah came in the small poly packaging with all the Yamaha logo and info, inc part numbers, plus I purchased the new lock washer at the same time that also came in it own Yamaha packaging.That is a good side by side comparison. You got a very shiny nut compared to mine - is it a genuine yam oneFazersharp take the same pic but turn the nut over!Have a search on here I think there was one posted a couple of years ago- my bikes asleep now and I don't want to wake it up otherwise it will want to go out and it looks a bit damp out there
Ok, I never opened the 9mm nut packet so never realised. Thanks all.
I would love to show you my nuts.
I hope I do not get PENALISED for this. :eek
Yours was probably passed its sell by date :lol
Same packaging as the photos above in the earlier posts
Post by: tommyardin on 06 December 2018, 11:50:39 pm
Post by: fazersharp on 07 December 2018, 12:10:13 am
PS: Both my nuts are shiny :eekCause you keep rubbing them up and down on a C90 seat
Post by: Skippernick on 08 December 2018, 09:27:33 pm