what's the stronger rear gear case? single or dual bearing?

[ped]

Hi forum. On AF16 motor.
anyone know what's the strongest, better, rear gear case? The single bearing type or dual bearing?
If it's the dual bearing? Could that be installed in a single bearing case motor? with the proper bearings, shaft, and cover.
Thanks on any Info.

[ped]

I know this wheel will not fit, but if it did it would look nice.

[curtis966]

Not sure which if either is really stronger or not but yes they are interchangeable. You just need both the single bearing cover and its matching axle or the 2 bearing cover and its matching axle the rest of the parts I believe are all the same.

[ped]

Not sure which if either is really stronger or not but yes they are interchangeable. You just need both the single bearing cover and its matching axle or the 2 bearing cover and its matching axle the rest of the parts I believe are all the same.

hi Curtis. So you're not sure which one stronger? But do you say the parts interchangeable? I wonder if it would have to change the axle shaft bearing?
I to believe single bearing shaft is a little thicker?

[curtis966]

I only think it's bigger on the cover side. The axle bearings in the cases are the same for afo5 and af16.

[ped]

I only think it's bigger on the cover side. The axle bearings in the cases are the same for afo5 and af16.

oh ok. I see so the output shaft for the cover side is larger. but not for the axle bearing.

[curtis966]

Correct. I only have 2 bearing cover af16's so I can get measurements for you.

[ped]

Correct. I only have 2 bearing cover af16's so I can get measurements for you.

Thanks Curtis.
I would think the two bearing shaft is stronger. But the single bearing shaft is thicker.
wonder which 1 will be stronger for a 120cc or bigger cc?

[Wheelman-111]

Greetings:

Believe it or not, I believe Honda-san switched to the plain (Steel spinning in an aluminum cup with only oil for separation) bearing on the port end of the axle shaft for cost reasons. I do not believe it's an "improvement" in any other way - performance OR durability. A bearing may only cost Honda a couple of bucks, but if you're minting a million scooters a year worldwide, well, you do the math.

I believe the roller bearing is a longer-lasting design. In addition to the axle end diameters, you should know there's a design-specific gasket change as well. I'm not sure how critical the correct gasket may be, but a plain bearing must never be deprived of oil.

[ped]

thank you wheelman, For the confirmation.
I appreciate the tip on the gasket. if I get a chance I will pick up both gaskits and post a photo.

[Wheelman-111]

Greetings;

I researched the issue like 4 years ago, and wrote the part numbers on a sticky-note. While the outer contour is the same, the inner channels are cut differently. I stumbled onto that sticky-note in my parts box last weekend. I don't have the sticky handy, but bought one of each last time I was on PartZilla. I plan to use the correct gasket when I install Graphie's gears. Thanks again for the fair price G9.

[ped]

I hope g9 ordered a extra set of those gears you getting? I forget 7. 97? 18 x 42? basically 8.0 gears.

[Wheelman-111]

Greetings:

Graphie provided the 7.97s for me. I thought I'd snap a pic of the key differences between the Early 2-bearing cover gaskets and the Late single-bearing version. Remember the detail change occurred in the MIDDLE of 2008, so BOTH versions were delivered in that model year. Someone once posted the serial number when the change occurred, so if you own an '08 you'd know which type to order.

For those just joining us, SA50s began with a gear cover that housed two bearings. The clutch shaft of course, but also the left end of the axle had a smaller end because it was supported by an NTK ball bearing. Some time in 1998, Honda decided to save a few bucks per example and delete the axle shaft bearing. The larger-diameter "Late" axle spins directly in the Aluminum of the cover, splash-fed with oil. That can mean that the wrong gasket won't let enough oil reach the Plain bearing, which would eventually be a Very Bad Thing. So without further ado,

20150110_192242_resized.jpg (273.47 KiB) Viewed 7178 times

OK, so on the GBL there's a second hole that's not there in the Early (GAH) version. The trapezoidal hole on the middle peak is missing, and the overall shape of the back part is cut into a "V". More inspection than I'm prepared to do would be necessary to give meaning to these changes, but even though both keep the 10W-30 from leaking out, I'm thinking it would be smart to use the gasket that's specified for your cover. Plain bearings don't run dry for very long.

[DirtyE]

You're making me want to go down to my basement and see which I have. Im trying to take a day off from my scooter. I was planning on using gasket maker for sealing mine back up. There is a special rtv for gearbox.

Edit: so I have an up-to 98 gearbox?

[paulpauly7]

you need the clearence of the gasket .Your gears will bind up with just sealer .