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Post by JonW on Jul 24, 2015 8:22:00 GMT 1
Im trying to fit my new (NOS) rear sprocket with new OEM tabs on my 250 LC wheel...  However... This is where I am stopped... it looks like the tab is a bit large for the sprocket, and on checking even the old tabs are the same size... Anyone ever seen this problem before?  |
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Post by Trubrit on Jul 24, 2015 9:16:32 GMT 1
Nuts Look Wrong Mate ...Should Be Quite A Thin Nut That Finishes Flush ...Ps Your Side Casing Is Done
Dave
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Post by yamark on Jul 24, 2015 10:49:15 GMT 1
With Dave on this one. This is the best picture I've got. Although mines a 350 rear wheel, a 14mm socket fits the nut and are gen Yam.
I have an old 250 wheel and that looks the same nut, the nut is quite shallow.
HTH Mark |
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Post by markhoopy on Jul 24, 2015 11:03:04 GMT 1
Looks to me like the sprocket on Yamark's wheel has a flat face - the 'scooped out' section isn't there. Is it possible to just fit the sprocket the other way round so yours is the same?
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Post by Trubrit on Jul 24, 2015 11:26:03 GMT 1
Looks to me like the sprocket on Yamark's wheel has a flat face - the 'scooped out' section isn't there. Is it possible to just fit the sprocket the other way round so yours is the same? Well Spotted . The Sprocket Is On The Wrong Way Round .. Dave |
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Post by yamark on Jul 24, 2015 12:12:54 GMT 1
Well spotted chaps. What a numpty I am 
Another thing on my to do list! |
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Post by markhoopy on Jul 24, 2015 12:22:04 GMT 1
Well spotted chaps. What a numpty I am
Another thing on my to do list! It was more of a guess than a spot to be honest  |
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Post by JonW on Jul 24, 2015 13:56:46 GMT 1
I did wonder about flipping the sprocket, but worried the groove would be unhelpful on the spacers over the bushes, even tho the bushes would fit the grove... LOL! The sprocket is an OEM unit so I assumed the grove was there for some reason, I assumed that the tabs were the most obvious use for it... and we all know what they say about assuming! Now I know why I dont mess with so many genuine parts for LCs normally, no aftermarket sprocket ever had a groove like that haha! Interesting on the nuts, these were the ones that came off the bike which seemed very genuine... Er, they are not done up at all in the pics, just hand tight to the lock tab which isnt flush... I didnt want to ruin the lock tab by widing em up tight. Dave, you'll like this... you scared the cr@p outa me! I was looking all over the wheel wondering what bit of my wheel could be called a 'side casing' and wondering how it was knackered, then the penny dropped... and of course, youre a star mate! Will drop you a PM... |
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Post by Trubrit on Jul 24, 2015 14:05:20 GMT 1
Dave, you'll like this... you scared the cr@p outa me! I was looking all over the wheel wondering what bit of my wheel could be called a 'side casing' and wondering how it was knackered, then the penny dropped... and of course, youre a star mate! Will drop you a PM... We All Have Them Moments Mate Dave |
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Post by JonW on Jul 24, 2015 15:01:18 GMT 1
Senior moments... LOL! Anyway, this is what forums are for, even those of us whove build many many bikes over the years are still learning  |
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Post by JonW on Jul 25, 2015 3:36:01 GMT 1
Ok, update... flipped the sprocket and I can see that the groove would locate in the 'flats' of the cush bushings, but it never really meets them as the (plastic?) spacers hold the sprocket above them when you drop it on... I can see that the strength of joint is that the sprocket's side to side motion is checked by the circlip, and the nuts hold the sprocket from turning, the cush takes the strain of wheelies, er.... Thats all fine, I just dont really get why it needs the groove unless its designed to pull the cush up into the sprocket (which i now actually think is what its designed to do, which seems kinda stressful on the cush rubbers but doig that would lock them in place and allow the nuts to be torqued up of course otherwise the cush bushes would rotate)... I think thats why I flipped it and tried to use the groove as the locator for the tabs etc. Do aftermarket 250 sprockets have the same grove I wonder, I reckon they would have to... but I doubt they all do.
So... Thanks everyone!
And... My next task is to find some of the correct nuts, anyone know the correct depth for them? Im 99% sure they are M10 fine thread (1.0), but whats the depth of the nut?
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Post by yamark on Jul 25, 2015 6:01:22 GMT 1
Jon, they are still available from Yamaha (they were last year)
I can only give you the part number for the 350LC as I don't have a 250 fiche, they do look the same? But you could check when ordering,
PN 95311-10700
HTH
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Post by JonW on Jul 25, 2015 9:19:50 GMT 1
Looking at the fiche the nuts are 95302-10700. they come out at around $5 each. eek. If anyone has a 250 and knows the depth I will see if i can find some stainless ones for that coin I reckon, else I could turn the ones I have now down a bit I guess. hmm...
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Post by oldelsieboy on Jul 25, 2015 9:59:29 GMT 1
Looking at the fiche the nuts are 95302-10700. they come out at around $5 each. eek. If anyone has a 250 and knows the depth I will see if i can find some stainless ones for that coin I reckon, else I could turn the ones I have now down a bit I guess. hmm... That part number supersedes to 95314-10600 priced at 76p each in the UK. OEB |
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Post by JonW on Jul 25, 2015 11:04:26 GMT 1
Thats much more reasonable |
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Post by JonW on Jul 25, 2015 13:52:31 GMT 1
FWIW, Im still interested if anyone has any of these nuts handy to know how deep they are, the ones I have may even be right for the 250...
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Post by Trubrit on Jul 25, 2015 14:57:15 GMT 1
Hey Jon . 14mm Across Flats . 6mm Deep , M 1.25
Dave
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Post by JonW on Jul 26, 2015 0:40:43 GMT 1
Cheers Dave! 6mm... Will have to see what mine are, they look 8 to me and they really do look like a 1.0 thread, makes me wonder what ive got fitted...
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Post by JonW on Jul 26, 2015 6:17:11 GMT 1
Yep nine are 8mm... I do wonder if when done up tight they will pull up the bushes and fit right, Will give that a go when Ive got a few mins.
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