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Keeping Spree Elite Aero 50cc and Gyro Alive!
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PostPosted: Fri Jul 10, 2009 4:12 pm 
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Greetings:

I thought I'd get the ball rolling for a Tech Doc that would let us know the stock ratios and calculate what happens when we change to aftermarket ratios. Copy, reply and fill in the blanks.

US Market Scooters:

1993 - 1984 NB50M Aero:



1985 - 1987 NB50 Aero
1987 SE50 Elite
1988-1993 Elite
Variator ratio:
Variable speed Constant velocity belt drive goes from 2.4:1 at idle to 0.8:1

Stock:
Primary ratio = 12/34
Secondary ratio = 12/47
= 11.097:1
Overall ratio: Variator-dependent overall gearing from 26.63:1 to 8.88:1

Malossi 67-6458 Primary replacement gears: (Only gearset available)
16/32
= 7.83:1


1984-1987 NQ50 Spree
Fixed belt drive ratio:

Single gear ratio:

Overall gear ratio:

1988-1989 SB50 Elite "E"

Fixed belt drive ratio:

Single gear ratio:

Overall gear ratio:

Euro/Asian Market Scooters:

Dio ZX:

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Wheelman-111
Founder: WHAC (Wheelman's Home for Abandoned 'Cycles)
Most of my money is spent on scooterparts. The rest is just wasted.
Flash 5 '01 SA50 Fabrizi 50 Malossi Crank OKO 28mm PG Short, ZX Trans, 8.44:1
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PostPosted: Mon Jul 13, 2009 4:59 pm 
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Location: Kailua-Kona, HI
94+ US Elite (dudeswapinadio)
Primary: 12x42
Secondary: 13x45
= 12.11:1

Aftermarket Secondary(final) gears:
9.8:1 = 15x42
9.1:1 = 16x42
8.4:1 = 17x41
7.5:1 = 18x39

Aftermarket Primary gears:
6.9:1 = 15x30
6.5:1 = 16x30

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PostPosted: Mon Jul 13, 2009 6:44 pm 
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Updated Spreadsheet - Rev 2b - added 20/36 secondary gear set to table
Updated Spreadsheet - Rev 2a - added 18/41 secondary gear set to table. Added 16/32 gear set on eliteguy50's input. Also updated 1983/4 Aero ratio to 7.99 to align with the Honda Service manual. Minor typo - 85 Aero has same gears at 86/87.


Image

Image

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PostPosted: Thu May 20, 2010 8:42 pm 
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Greetings:

I kept this a secret, lest I jinx my recent purchase. I've had my lesson with the ill-fated Wild Lion That Never Was from Malossi USA. Anyhow these:

Image
Showed up as promised via UPS tonight. Well, almost as promised. They were supposed to be new, but they were dripping with gear oil (that unmistakable aroma of Crusty's Garage...) and a few flecks of red paint for some reason. The Husky countershaft sits in its #4 gear there on the left. The seller even forgot to remove the shim washer, which was stuck to the countershaft gear! No matter, they're not worn as far as the eye can see, and they're - get this! - 20 x 36.

That's right, you read correctly. 20 x 36 Secondaries. I had the seller throw in a used Elite axle for an extra couple of bucks. I'll have Honda-san press the stock #4 gear off and install the 36- (counted 'em!)-tooth axle gear manana. The axle is the "early" one with the shaft end cut for a 6303 bearing, just like Flash 4's cover. Quick-change ratio swaps. :geekdance:

Combined with the 12/42 primaries, this yields a 6.3:1 final drive ratio. What remains to be seen is if Flash 4 has the torque to drive these babies off the line. Or up hills. One thing's for sure, top speed should go up a bit, as long as there's light rollers in the vario and/or a tailwind.

Mouse, could you add this option to the spreadsheet? Not sure where they came from, not sure if they're still available, but I lucked out on eBay this time.

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Wheelman-111
Founder: WHAC (Wheelman's Home for Abandoned 'Cycles)
Most of my money is spent on scooterparts. The rest is just wasted.
Flash 5 '01 SA50 Fabrizi 50 Malossi Crank OKO 28mm PG Short, ZX Trans, 8.44:1
:coolcruise:


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PostPosted: Mon Oct 04, 2010 8:43 pm 
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Greetings:

Another oddball gearset came WHAC's way. 18x41 secondaries calculate to 7.97:1. Need another spreadsheet mod?

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Wheelman-111
Founder: WHAC (Wheelman's Home for Abandoned 'Cycles)
Most of my money is spent on scooterparts. The rest is just wasted.
Flash 5 '01 SA50 Fabrizi 50 Malossi Crank OKO 28mm PG Short, ZX Trans, 8.44:1
:coolcruise:


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PostPosted: Fri Oct 22, 2010 10:24 pm 
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Table here and on the wiki is updated. Also - the 84/85 Aero gear ratio is updated, service manual shows the ratio as being different from the AF05 variated engines. Tooth counts were not in the manual, am still looking. Anyone know what they are - or if the interchange of the early Aero gears into later models are?


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PostPosted: Sat Oct 23, 2010 12:01 am 
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Greetings;

Don't have the Tooth Tally for '83 and '84, but don't think they swap with '85-'87. Bought an '84 M cover by mistake and found the bearings were smaller.

It's fascinating how many changes Honda-san made, and yet how little the scooters really changed - at least in spirit.


BTW there are also 19/38 secondaries for a 7;1 ratio for Dii that fit the Elites.

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Wheelman-111
Founder: WHAC (Wheelman's Home for Abandoned 'Cycles)
Most of my money is spent on scooterparts. The rest is just wasted.
Flash 5 '01 SA50 Fabrizi 50 Malossi Crank OKO 28mm PG Short, ZX Trans, 8.44:1
:coolcruise:


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PostPosted: Fri Dec 10, 2010 10:25 am 
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Greetings:

Evidently some Euro Dio models arrived bearing 12/34 primaries. I know because I have a set. Spreadsheet mod time?

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Wheelman-111
Founder: WHAC (Wheelman's Home for Abandoned 'Cycles)
Most of my money is spent on scooterparts. The rest is just wasted.
Flash 5 '01 SA50 Fabrizi 50 Malossi Crank OKO 28mm PG Short, ZX Trans, 8.44:1
:coolcruise:


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PostPosted: Mon Jan 10, 2011 10:30 pm 
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Wheelman strikes again, more gears than most :thumbsup: Do you have a link to a seller?

Link: Wiki's updated gear chart


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PostPosted: Mon Jan 10, 2011 10:49 pm 
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Greetings:

Sadly no link for Aftermarket sellers of the 12/34 primaries.
I found them on eBay.UK, bought the whole gearset for the 7.5: secondaries I can't use without a "late" single-bearing cover.

Anyone with an SK50 Dio should have them as stock gears, and keep that in mind when ordering gears that purport to be "9:1". With Legendary Wheelman math "skills" I can calculate true overall ratio,
12/34 was also stock Aero primary ratio, but of course with the 12/47 seondaries that means 11.097:1.

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Wheelman-111
Founder: WHAC (Wheelman's Home for Abandoned 'Cycles)
Most of my money is spent on scooterparts. The rest is just wasted.
Flash 5 '01 SA50 Fabrizi 50 Malossi Crank OKO 28mm PG Short, ZX Trans, 8.44:1
:coolcruise:


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 Post subject: Yet Another Ratio
PostPosted: Mon Feb 21, 2011 11:22 am 
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From EliteGuy50 cometh:
Quote:
Another secondary set for the chart with a ratio of 8.96875:1 so basically they are 9:1. The gears are 16x41 found at VT Cycles. If these become more poplular, we will have to start calling the 16x42 set 9.19:1 or 9.2:1 instead of just 9.1:1 that it is referred to as now.

-JD

Time for another Spreadsheet mod?

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Wheelman-111
Founder: WHAC (Wheelman's Home for Abandoned 'Cycles)
Most of my money is spent on scooterparts. The rest is just wasted.
Flash 5 '01 SA50 Fabrizi 50 Malossi Crank OKO 28mm PG Short, ZX Trans, 8.44:1
:coolcruise:


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PostPosted: Sat Apr 07, 2012 8:58 pm 
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New ratios are being posted into the 'wiki.

We have 16/41 and 19/37 updated at this link...

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mousewheels


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