It would be nice to know the size of the huge nut on the clutch basket

[myfootisdumb]

Yes, i need to know the size of the huge nut on the clutch basket so that i can remove it and install my factory pro shift kit.. my old bike was 27 MM

 

your help is needed

[mjh937]

@myfootisdumb, I am not sure which nut you are talking about but the only one I can see in the manual is the clutch boss nut (#8 on the drawing).  It does not look very big, but I have not had my clutch apart so maybe it is bigger than it looks.  

[myfootisdumb]

yes its #8 was 27MM on my last bike

[DewMan]

You'd think with all the slipper clutch talk in this forum someone would remember the socket size. 
 

Yamaha 90179-20007-00 - NUT | Partzilla.com

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Buy Yamaha 90179-20007-00 - NUT. This OEM part is guaranteed by Yamaha's limited part warranty ✓ FREE Shipping on qualified orders - Partzilla.com

 

This shows all the other bikes this nut fits. perhaps with some Google-Fu you can find the answer to the socket size.

[FZark07]

One Millimeter is .03937". So if you are able to measure the nut  with dial caliper or even ballpark it with a tape, divide that by .03937 and you will  have the size in millimeters. Never had mine apart so I can't tell you the size.

[ElGonzales]

There's a picture with a ruler in the upper partzilla link. I did some wild cgi special effect magic and turned the nut!
But I can't read the funny ruler, is this a width of  something between 1,25 and 1,125 inches ? No wonder that Harley struggles!
1,125 inches = 28,5 mm

It seems bigger than that and nobody uses a 29mm socket, so 30 mm seems to fit.
1,1811 Inches = 30mm (?).  Errrm no warranty picture is not 100% perpendicular

But 30mm is also the standard wrench-size for a M20 nut in my country according to DIN and ISO. Little Japanese people have no JIS standard for such big nuts I think      

I prefer to open my tool locker and if the chosen socket is to small, I just take a bigger one.
(really, I have 3 repair books for the bike and nowhere you can find the nut size)

 

Edited November 10, 2020 by ElGonzales
added more conjunctive

[DewMan]

59 minutes ago, ElGonzales said:

There's a picture with a ruler in the upper partzilla link. I did some wild cgi special effect magic and turned the nut!
But I can't read the funny ruler, is this a width of  something between 1,25 and 1,125 inches ? No wonder that Harley struggles!
1,125 inches = 28,5 mm

It seems bigger than that and nobody uses a 29mm socket, so 30 mm seems to fit.
1,1811 Inches = 30mm (?).  Errrm no warranty picture is not 100% perpendicular

But 30mm is also the standard wrench-size for a M20 nut in my country according to DIN and ISO. Little Japanese people have no JIS standard for such big nuts I think      

I prefer to open my tool locker and if the chosen socket is to small, I just take a bigger one.
(really, I have 3 repair books for the bike and nowhere you can find the nut size)

 

I wouldn't rule out it possibly being  29mm. I've seen that size on bikes in the past.

[myfootisdumb]

its a 30mm just had the clutch apart.. thanks