Gearbox help

[emerald]

So this gearbox on Amazon looks alot like the stock one for my 4 stroke, but it says it's for a 2 stroke. Could I swap some parts from nine and it to make a better gearbox for my bike or would they just not work? Heres the stock one.

Transmission Gear Reduction Box Clutch Replacement for 47cc 49cc 2-stroke T8F 11T 13T 14T 17T 20T Teeth Pocket Mini Bike Silver https://a.co/d/eSK4fKI
(I'm just trying to not spend $100 on the grubee or bike berry one if I don't have to)

 

[Sidewinder Jerry]

So this gearbox on Amazon looks alot like the stock one for my 4 stroke, but it says it's for a 2 stroke. Could I swap some parts from nine and it to make a better gearbox for my bike or would they just not work? Heres the stock one.View attachment 216039
Transmission Gear Reduction Box Clutch Replacement for 47cc 49cc 2-stroke T8F 11T 13T 14T 17T 20T Teeth Pocket Mini Bike Silver https://a.co/d/eSK4fKI
(I'm just trying to not spend $100 on the grubee or bike berry one if I don't have to)

When it says 2 stroke they're talking about the pull cord 2 stroke engines; not the pedal start engines. If it looks like the one you already have then both are of the lowest quality transmissions.

 

[emerald]

When it says 2 stroke they're talking about the pull cord 2 stroke engines; not the pedal start engines. If it looks like the one you already have then both are of the lowest quality

I have to find the right socket to open it up, but I've heard of some kits coming with the transmission gears welded on, since this came with interchangeable ones I was wondering if transferring the extended shift could let me jerry rig a better one for cheaper after I find my socket sets

 

[michael whiteman]

I think they're refering to the interchangeable sprockets on the output shaft, not the ones inside. The sprocket inside is actually part of the shaft. I think your current trany is identical.

 

[Sidewinder Jerry]

I think they're refering to the interchangeable sprockets on the output shaft, not the ones inside. The sprocket inside is actually part of the shaft. I think your current trany is identical.

Some of these 27/9 transmissions now have a double chain in them and the larger sprockets are removable. Unlike the 27/9 single chain transmission whose larger inside sprocket is welded to the shaft. Unfortunately the shafts on these are placed in a brass bushing. This is where GruBee has improved their 41/7 JaiLi transmission the shafts are in a sealed bearing.

 

[emerald]

Some of these 27/9 transmissions now have a double chain in them and the larger sprockets are removable. Unlike the 27/9 single chain transmission whose larger inside sprocket is welded to the shaft. Unfortunately the shafts on these are placed in a brass bushing. This is where GruBee has improved their 41/7 JaiLi transmission the shafts are in a sealed bearing.

View attachment 216089
View attachment 216091

So it doesn't look welded on there, could I just get a larger input gear?

 

[Sidewinder Jerry]

So it doesn't look welded on there, could I just get a larger input gear?

Do you mean on the input on the jackshaft? A larger sprocket probably wouldn't fit. For what you'll spend trying to make that functional you could buy the JaiLi from GruBee.

JaiLi Dual Chain Freewheel Drive transmission for the Huasheng 49/53cc

Time to know the 2 main differences between chain drive gear boxes for HuaSheng 4 stroke 53/49cc engines. We had Mr. Chen at JiaLi modify his famous 6 to 1 ratio Dual Chain Freewheel Sprocket Drive transmission to utilize our proprietary 10T and 9T slide drive sprocket design that enables easy...

www.grubee.net

 

[emerald]

Do you mean on the input on the jackshaft? A larger sprocket probably wouldn't fit. For what you'll spend trying to make that functional you could buy the JaiLi from GruBee.

JaiLi Dual Chain Freewheel Drive transmission for the Huasheng 49/53cc

Time to know the 2 main differences between chain drive gear boxes for HuaSheng 4 stroke 53/49cc engines. We had Mr. Chen at JiaLi modify his famous 6 to 1 ratio Dual Chain Freewheel Sprocket Drive transmission to utilize our proprietary 10T and 9T slide drive sprocket design that enables easy...

www.grubee.net

Gotcha, I figured it'd be worth a shot to check and see if I couldn't reuse hardware

 

[Sidewinder Jerry]

Gotcha, I figured it'd be worth a shot to check and see if I couldn't reuse hardware

If you have a long jackshaft and plan to do a shift kit build or drive a standard IGH transmission; you might be able to put it into the GruBee transmission.

 

[emerald]

If you have a long jackshaft and plan to do a shift kit build or drive a standard IGH transmission; you might be able to put it into the GruBee transmission.

Is the grubee one long enough for the chain to line up? Compared to the long shaft mine has?