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 Rear wheel nut size? 
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Location: Los Angeles area
scooters and mods: 05 Z50 4200 miles, 70cc Polini, 84 jet, Leo Vince zx, Athena Variator, stock clutch w/LV yellow springs and Athena contr
Post Rear wheel nut size?
Does anyone know what it is? It's just under 1", but it's very hard to measure with digital calipers (because they're too precise).

I'm sure I can find a 1" one for my impact wrench. Will it work?

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'05 Zuma 50, Athena sport 70cc (12mm piston) with Polini head (.9 squish), B9ES spark plug; timing advanced about 2˚; Yasuni C16 exhaust, Buzzetti kick stand to make room for it (and Stage6 paddock stand after dropping the freaking bike because of the kick stand); stock airbox no snorkel, 5 x 1/2" holes; Stage6 21mm racing PHBG, 45/95/W7 1 lean/40 slide; Polini/Power One 12mm HPC crank; Athena 15/50 gears (also have 14/42s pressed into a gearbox cover, just switched back and like the 15/50s so far); 107mm Malossi Delta clutch, "racing" red springs/lighter "racing" counterweights ± 6800 RPM engagement, Stage6 Kupplungsglocke (bell - the light one); Malossi 6112811 Overrange kit, red contra and 28.2G rollers; VForce 3 reeds; Michelin Bopper tires; back to the stock shock; dual headlight wiring; C3 mirrors; Trailtech TTO tachometer and temp gauge.


Wed May 16, 2012 5:25 pm
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Location: in a Louisiana swamp ... somewhere
scooters and mods: '09 Zuma 164
Post Re: Rear wheel nut size?
I'm not sure ... I'm seeing one guy say that it's 22mm ... another says that he used an adjustable wrench. I don't have a Zuma 2T so I don't really know.
But ... if it is 22mm ... then a 1" socket will not work. 7/8" might ?? ??
Nick Batzdorf wrote:
Does anyone know what it is? It's just under 1", but it's very hard to measure with digital calipers (because they're too precise).

I'm sure I can find a 1" one for my impact wrench. Will it work?

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Installed 164 bbk in 2009


Wed May 16, 2012 8:36 pm
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Location: Los Angeles area
scooters and mods: 05 Z50 4200 miles, 70cc Polini, 84 jet, Leo Vince zx, Athena Variator, stock clutch w/LV yellow springs and Athena contr
Post Re: Rear wheel nut size?
Thanks, but I have a 7/8" one and it's too small. It seems to be just under 1". When I put the calipers at exactly 1" they fit kinda loosely.

Digital calipers are too precise. I wish they had a setting to round off the result, because as soon as you change the angle a hair you get a crazy reading.

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'05 Zuma 50, Athena sport 70cc (12mm piston) with Polini head (.9 squish), B9ES spark plug; timing advanced about 2˚; Yasuni C16 exhaust, Buzzetti kick stand to make room for it (and Stage6 paddock stand after dropping the freaking bike because of the kick stand); stock airbox no snorkel, 5 x 1/2" holes; Stage6 21mm racing PHBG, 45/95/W7 1 lean/40 slide; Polini/Power One 12mm HPC crank; Athena 15/50 gears (also have 14/42s pressed into a gearbox cover, just switched back and like the 15/50s so far); 107mm Malossi Delta clutch, "racing" red springs/lighter "racing" counterweights ± 6800 RPM engagement, Stage6 Kupplungsglocke (bell - the light one); Malossi 6112811 Overrange kit, red contra and 28.2G rollers; VForce 3 reeds; Michelin Bopper tires; back to the stock shock; dual headlight wiring; C3 mirrors; Trailtech TTO tachometer and temp gauge.


Wed May 16, 2012 9:28 pm
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Location: in a Louisiana swamp ... somewhere
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Post Re: Rear wheel nut size?
Next size would be 15/16" ... and since you said that ... maybe the 1" will work. I just wouldn't want you to round the corners of the nut ... if it's too loose.
Nick Batzdorf wrote:
Thanks, but I have a 7/8" one and it's too small. It seems to be just under 1".

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Wed May 16, 2012 9:58 pm
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Location: in a Louisiana swamp ... somewhere
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Post Re: Rear wheel nut size?
23 millimeters = 0.905511811 inches

What I read must have been wrong in their discussion ... from all that you and I have said ...

It's got to be 23MM

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Wed May 16, 2012 10:04 pm
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Post Re: Rear wheel nut size?
The rear wheel nut is 24mm. The closest inch socket size would be 15/16 inch but only use a 6 sided socket or it might strip.

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Thu May 17, 2012 2:23 am
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scooters and mods: 05 Z50 4200 miles, 70cc Polini, 84 jet, Leo Vince zx, Athena Variator, stock clutch w/LV yellow springs and Athena contr
Post Re: Rear wheel nut size?
Thanks SnS.

I think they only come 6-sided, though, no?

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'05 Zuma 50, Athena sport 70cc (12mm piston) with Polini head (.9 squish), B9ES spark plug; timing advanced about 2˚; Yasuni C16 exhaust, Buzzetti kick stand to make room for it (and Stage6 paddock stand after dropping the freaking bike because of the kick stand); stock airbox no snorkel, 5 x 1/2" holes; Stage6 21mm racing PHBG, 45/95/W7 1 lean/40 slide; Polini/Power One 12mm HPC crank; Athena 15/50 gears (also have 14/42s pressed into a gearbox cover, just switched back and like the 15/50s so far); 107mm Malossi Delta clutch, "racing" red springs/lighter "racing" counterweights ± 6800 RPM engagement, Stage6 Kupplungsglocke (bell - the light one); Malossi 6112811 Overrange kit, red contra and 28.2G rollers; VForce 3 reeds; Michelin Bopper tires; back to the stock shock; dual headlight wiring; C3 mirrors; Trailtech TTO tachometer and temp gauge.


Thu May 17, 2012 10:10 am
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Post Re: Rear wheel nut size?
That large you may not find anything other than 6 sided but they do make 12 sided or perhaps I should say pointed. It makes it easier to got the socket onto the nut/bolt but they also slip easier. If you use an empirical socket on a metric nut it isn't an exact fit for even more likely to slip.

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Thu May 17, 2012 2:40 pm
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Joined: Tue Jul 08, 2008 9:16 pm
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Location: Los Angeles area
scooters and mods: 05 Z50 4200 miles, 70cc Polini, 84 jet, Leo Vince zx, Athena Variator, stock clutch w/LV yellow springs and Athena contr
Post Re: Rear wheel nut size?
Ah. I was thinking five sides or something and couldn't imagine what you were talking about!

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'05 Zuma 50, Athena sport 70cc (12mm piston) with Polini head (.9 squish), B9ES spark plug; timing advanced about 2˚; Yasuni C16 exhaust, Buzzetti kick stand to make room for it (and Stage6 paddock stand after dropping the freaking bike because of the kick stand); stock airbox no snorkel, 5 x 1/2" holes; Stage6 21mm racing PHBG, 45/95/W7 1 lean/40 slide; Polini/Power One 12mm HPC crank; Athena 15/50 gears (also have 14/42s pressed into a gearbox cover, just switched back and like the 15/50s so far); 107mm Malossi Delta clutch, "racing" red springs/lighter "racing" counterweights ± 6800 RPM engagement, Stage6 Kupplungsglocke (bell - the light one); Malossi 6112811 Overrange kit, red contra and 28.2G rollers; VForce 3 reeds; Michelin Bopper tires; back to the stock shock; dual headlight wiring; C3 mirrors; Trailtech TTO tachometer and temp gauge.


Thu May 17, 2012 2:57 pm
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