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Speedo gets its reading off your front wheel. No change.
 

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Does anyone still sell the drop in kits? I bought a 2007 C50 and it revs way too high on the highway! I can only go 130km/h before im bouncing off the rev limiter. I would love to do this mod cause other then that I love the bike.
 

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Thanks for the explanation. I kept seeing references to this mod but no one said what it did since all of the people who've been here longer already knew.
 

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hello dear all

i am pretty new to this forum - my name is martin aka sayhello

- i am very very glad to see all this.

well to introduce me a bit: i ride a vx 800 and i live in Europe. I have heard about this drive mod in a vx800 forum -
i want to apply all the changes to a vx 800 - can you help me here.

i would love to hear from you - Where can i get the parts that i need!?
 

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any idea - is there anybody who is willing to answer!?

I've looked up different sources and I don't find any "vx800'' Suzuki motorcycles.

I've found ''VS800'' and ''VZ800'' though.

Also, it would be helpful to know the year your bike was made.

Please confirm your make, model and year information and we may be able to provide some direction for you.
 

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good day dear Gene - many man thanks for the reply.

i run a suzuki VX 800 - this motorcycle was built between 1989 and 1997 -

note: i have two - one 1992 and one 1996 ....

see various ressources for the bike:


Suzuki VX800 Motorcycle Forum - a english ressource

vx800.de - a german ressource




I've looked up different sources and I don't find any "vx800'' Suzuki motorcycles.

I've found ''VS800'' and ''VZ800'' though.

Also, it would be helpful to know the year your bike was made.

Please confirm your make, model and year information and we may be able to provide some direction for you.

in this tread Alan describes how he did the DJ Drive-mod - he adopted the VS 1400 final drive
to a VX 800 with great results.


see Login

note: he refes to this great forum here: Different rear drive ratio/highway cruising - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum

(theres over 40 pages to the thread, so if you have nothing else to do read on....)


Alan in the thread see Login
This project has been a long time coming.
I am not an expert, nor do I have an engineering back ground I have just brought all this information together to make it all happen. This is my adventure…..
I finally got a final drive from a VS1400 Intruder installed. The hub ratio is 2.66 vs the 3.09 of the VX. Approx 14% taller gearing throughout all gears.

Top speed is not effected, as it is now too tall to rev beyond 7200 rpm (or 110ish mph). This is with a new Avon Storm 150/80 on the rear.
The rpms are lower in all gears. At 60mph I turn 4200ish rpm and 70 comes at just about 5000 rpm. I have only had it on for 2 tanks of gas so I have not memorized exact speeds. These are approximate.

So far I have seen a consistent 220 miles per tank, on mostly highway riding at 65--70 mph. Normally 180 miles per tank is common.
It does require the modification of your swing arm as well as the shortening of your drive shaft. This is how it all came about:

A while ago I was looking at fiche on Alpha sports web site and I surmised that a GV 1400 Cavalcade may fit (it will fit but there are fitment issues), it looks eerily similar to the VX hub. It took me a while to track one down, only to discover that the axel is 2mm bigger, as well as a shock post that is out board by almost a full 2cm more than stock, and the hub splines are deeper (15mm vs 10mm), and the splines of the hub are further out beyond the inner face of the hub too.
I had first read about a modified drive shaft/hub swap on the Intruder forums Different rear drive ratio/highway cruising - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum )(theres over 40 pages to the thread, so if you have nothing else to do read on....). ***I dont know how the Volusia/boulevard riders get 3100rpm at 65 but they do (so they say)***. We (VX’ers) are supposed to have the same transmission. I would like some help figuring that out if anyone knows what to look for.

I had ordered and received my first modified drive (from the originator of the idea, Dan Hillis) back in May of last year. I took a day off from work to install it. It was my first time opening up the drive hub of the VX. Its not hard. I quickly found out that the modified drive shaft I had gotten would not fit. Misinformation from the seller, but its not his fault. VX has its own drive shaft length. It is not shared with any other Suzuki that I can figure out (I have one from the GV1400, 2 VS800, 1 VS1400, 1 VS700). So I had to get my drive shaft shortened to make it a comparable length to the hub as with the stock hub.
Let me explain. Where the drive shaft mates to the hub is at a different height in the hub in relation to the axle on the VS1400 hub compared to the VX800 hub. This is important to maintain so that when the suspension is in compression and the drive shaft moves in the hub (there is a small amount of play for this to happen as it is supposed to). What I did was measure the shoulder of the drive shaft (where it meets the U joint beside the output gear) to the face (including the bearing retainer) of the old drive hub. Then I measured the same distance from the shoulder to the drive hub face (including the bearing retainer). I had to shorten it by that much (at this point it was last September so I dont recall what it was exactly). I think it was 3/8". This link shows some of the engineering that has gone into the mod (not just this one, there are several versions of it) up to today. How to guide: VS1400 drive on a VL800/C50 - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum

That was only one of the problems I had to overcome. The other is the shock post on the VX is shorter than any of the other Suzuki Models I have found (including, GV1400 Cavlacalde, VS700, VS1400, I have purchased one, or more, from each of these so that I can take measurements of them, as well as axles and spacers). It is shorter by about 1.2 cm. This is an issue because the axel will not go through the right side of the swing arm as there is a parallax that occurs with the shock in the VS1400 hub (the shock base is now out of line by 1.2 cm). I tried to follow in the foot steps of Ferenc Kovacs, a fellow VX forum member that has successfully swapped in a VS800 Intruder drive hub (geared the same as the stock VX hub). He had the shock post unscrewed and machined down the appropriate amount. To make the VS1400 hub fit I didnt really want to machine it down. Unlike the VS800 drive hub the VS1400 hub shock post is not as much of an actual post as it is just an area of the case that needs to be machined or shortened. I was acutely aware that I may machine through the case, destroying it. Having looked at pics from other on the intruder forum, I decided against machining the hub.

My machinist had the idea of doing this. Shimming the shock post OUT, at the top, so the bushing rests on the treaded part of the shock post (remember we are talking about the top post here), and securing it with a bushing with a threaded insert so it is very secure. In fact it has more threads securing it on now than it did in its stock configuration. OK I think its question time.....---
dear Gene - i hope that you can help me - that you can tell me what i need to do...

love to hear from you
say
 

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I have been researching the parts on this project and it appears from the Suzuki part numbers, that your VX final drive is at least somewhat related and could be a fit.

From the text of the post in the VX forum, it seems that a member there has accomplished the swap but with some differences from the installation on the C50 due to the different shock absorber mounting.

The issues that I see for this swap to your VX are these.

1. Making the drive shaft fit like the original.

2. Making sure that the axle fits properly. You may need to have a special spacer made at a machine shop so the axle bolt will maintain alignment and the drive will not bind when the axle nut is tightened.

3. Making the shock fit the mount on the new drive as described by the VX forum member who already did the swap.

There may be more issues that I don't foresee because I have no experience with your bike model.

I have no advice to give so far as measurements for the driveshaft, spacers or the shock mount.

There are threads on this forum giving measurements for doing the swap onto the VL800/C50 but there is no guarantee that they will be the same measurements for your bike model until you get it apart and compare your existing drive and parts to the new one. Even then the measurements may need to be adjusted to achieve the best fit for the individual bike/drive combination.

The threads/instructions for the VL800/C50 can only be considered a guide for your bike until the swap is proved by multiple installations.

Find a good machinist/machine shop that will work with you to make sure that everything goes well for you.
Good luck

Gene
 

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Sorry for the bad texting, I am talking about length to shoulder near splines c50 with c-90 final drive. C-90 drive shaft mod, I understand 3/16 or .2 reduction.
 

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So I'm about to likely dig in to this on my girlfriend's '07 C50. Sounds like her splines went and will be checking this Saturday. Either way, we'll have it all out and she wants to do the upgrade anyhow. I'll hope over to the swap meet to look for drop-ins first. If nothing, I can likely handle the build since I have a few friends who are machinist. If not, anyone know if any of the people who did the drop-ins still do? I already sent an email to the one provided.

-Adam
 

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