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"Final Drive Mod" on the vs800?
Posted: Tue Sep 13, 2022 7:54 am
by Acton67
Recently saw a discussion on Facebook about this. Apparently it's possible to replace the rear diff from the 800 with the one from the 1400 to lower rpms at highway speeds. Anyone know anything about this? Some are calling it the "final drive upgrade", others call it the "1400 mod".
Re: "Final Drive Mod" on the vs800?
Posted: Tue Sep 13, 2022 6:35 pm
by hillsy v2
Acton67 wrote: ↑Tue Sep 13, 2022 7:54 am
Recently saw a discussion on Facebook about this. Apparently it's possible to replace the rear diff from the 800 with the one from the 1400 to lower rpms at highway speeds. Anyone know anything about this? Some are calling it the "final drive upgrade", others call it the "1400 mod".
From what I recall they are interchangeable and the 1400 has a lower ratio = lower revs.
Re: "Final Drive Mod" on the vs800?
Posted: Tue Sep 12, 2023 7:20 pm
by ELM
Did you try this? I am more interested in the upgrade to rear disc break
Re: "Final Drive Mod" on the vs800?
Posted: Mon Sep 18, 2023 10:52 am
by Pio412
Just did this conversion last week. I got a 2001 vs1400 rear diff assembly and graphed it to my 2000 vs800. Only modifications needed are widening the flange holes one the swing arm and grinding down some of the reliefs from the aluminum molding of the hub. (just install the wheel when the shaft and drive is on and you'll see and hear what I'm talking about when you spin the wheel.) Fits like a glove and made the bike feel much better in terms of gearing. Best mod for the vs800 in my opinion!
https://ibb.co/b7L8mqs
Re: "Final Drive Mod" on the vs800?
Posted: Mon Sep 18, 2023 2:45 pm
by sgtcall
Pio412 wrote: ↑Mon Sep 18, 2023 10:52 am
Just did this conversion last week. I got a 2001 vs1400 rear diff assembly and graphed it to my 2000 vs800. Only modifications needed are widening the flange holes one the swing arm and grinding down some of the reliefs from the aluminum molding of the hub. (just install the wheel when the shaft and drive is on and you'll see and hear what I'm talking about when you spin the wheel.) Fits like a glove and made the bike feel much better in terms of gearing. Best mod for the vs800 in my opinion!
https://ibb.co/b7L8mqs
Here's your picture. Love the Trump sticker by the way.
Re: "Final Drive Mod" on the vs800?
Posted: Fri Sep 22, 2023 5:25 am
by Catbird
I been considering this mod for years and recall several from the original Intruder Alert doing so.
My recollection is…
Other than the drive unit you would need the 1400 drive shaft, u-joint, and axle spacer.
Could anyone elaborate if this is correct?
Thanks!
Re: "Final Drive Mod" on the vs800?
Posted: Fri Oct 20, 2023 10:34 am
by Pio412
All you need is the drive shaft assembly, as shown in the image attached. From what i can recall, all other parts from the 800 can be used with it, including the u joint. Plus you do have to oval the flange holes to get the shaft to fit the 800 swing arm.
if you decide to go for it and have any issues, ill be here to guide you through it.
God Bless
images google com free
https://ibb.co/2nGXLXx