Different rear drive ratio/highway cruising - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
 5Likes
Reply
 
LinkBack Thread Tools
post #1 of 2183 (permalink) Old 06-20-2007, 02:39 AM Thread Starter
Senior VR Member
 
Join Date: Jun 2007
Location: Ohio
Posts: 385
Thanks: 0
Thanked 2 Times in 1 Post
Different rear drive ratio/highway cruising

Hey, I am new to this site. I just bought an 06' C50T and my fiance and I love it. I have previous experience with an 82' Kawasaki 750 and a 98' Honda Valkyrie (fathers).

I absolutely love everything about this bike except one thing, the highway cruising RPM's. I commute 124 miles a day and love using the bike for the fun factor and fuel mileage. Most of my commute is between 60-75MPH, which is in the 3700-4700 RPM range.

I have been considering different methods to lower cruising RPM's, specifically a taller rear tire/rim or different rear drive gears.

My specific requirements are a happy medium at highway speeds. Here are my opinions on what I may need to do this:

1)optimum efficiency is typically at max torque RPM, which in this case is 3500 RPM according to Suzuki.
2)I would like to run 65MPH (average of different cruising speeds/most highway speed limits) at 3500 RPM.

In order to accomplish this, I would need:

A)a 30" tire, compared to 26" stock tire. This is a 4" difference, which is unlikely to fit under the stock rear fender.

B)Final drive reduction of 3.00, rather than the stock 3.503.

Now my question's to all of you is this: Are you familiar with any company that manufactures different rear differential gears? Also, is there a different Suzuki (or other brand) gear that may fit the c50's rear diff housing that is closer to a 3:1 ratio.

If there is not a gear already manufactured, I may be in contact with a local high-performance manufacturing facility to see if they can manufacture a 3:1 rear drive gear.

Thanks,
Dan

Hillis Fabrication LLC
www.hillisfabrication.com
dhillis is offline  
The Following 2 Users Say Thank You to dhillis For This Useful Post:
jkcerda (08-24-2013), Shloader (07-30-2012)
Sponsored Links
Advertisement
 
post #2 of 2183 (permalink) Old 06-20-2007, 03:28 AM Thread Starter
Senior VR Member
 
Join Date: Jun 2007
Location: Ohio
Posts: 385
Thanks: 0
Thanked 2 Times in 1 Post
Update:

After some more research, I looked up the different gear ratios between the c50 and the c90. The c90 has a final drive ratio of 2.66:1, which would equal out to 3,082 RPMS at 65MPH on the c50.

I also looked up the online parts diagrams for the c50 and c90. According to the diagrams and part numbers, it appears as though the rear diff on both machines are quite similar. I may try get my hands on the c90's final driven gear and see if can be installed in the c50's case without modification.

Dan

Hillis Fabrication LLC
www.hillisfabrication.com
dhillis is offline  
post #3 of 2183 (permalink) Old 06-20-2007, 06:04 AM
Senior VR Member
 
Kinjin's Avatar
 
Join Date: Mar 2007
Location: San Diego
Posts: 422
Thanks: 0
Thanked 0 Times in 0 Posts
Keep us updated

-Knowledge is Power-
Kinjin is offline  
 
post #4 of 2183 (permalink) Old 06-20-2007, 06:25 AM
Senior VR Member
 
Join Date: Jun 2005
Posts: 2,071
Thanks: 0
Thanked 4 Times in 4 Posts
First, welcome aboard!

Second, unless you are a bonafide gearhead I wouldn't do that. Besides the hassle (unless you are a tinkerer) the bike needs that ratio for roll on power at cruising speed. Hook that tall gear to that 50 cubic in. motor and you'll be kicking it down a gear just to change lanes. The VL800 just is what it is, an 805cc bike. I personally think the Suzuki engineers got the most out of it with the OEM set up. And it don't hurt it to wind it up because it takes a lickin' and keeps on tickin'.

That said, if you are hell-bent on doing this I will be following your progress with much interest! Good luck!
big ed is offline  
post #5 of 2183 (permalink) Old 06-20-2007, 06:28 AM
Senior VR Member
 
472viper's Avatar
 
Join Date: Jul 2005
Location: So. Dak. Sioux Falls
Posts: 28,859
Thanks: 1,109
Thanked 3,006 Times in 2,194 Posts
Going from a 3.503 final drive ratio to a 2.66:1, aren't you concerned your going to have to push it to get it rolling? The bottem end would really suck. I don't think the bike revs high at all at 65-70. That's it's sweet spot. It's 75 and on up that things get a little buzzy.
Viper

When I want to read a really good Harley thread, I just turn to VolusiaRiders.com
472viper is offline  
post #6 of 2183 (permalink) Old 06-20-2007, 06:57 AM Thread Starter
Senior VR Member
 
Join Date: Jun 2007
Location: Ohio
Posts: 385
Thanks: 0
Thanked 2 Times in 1 Post
Let's just say I am a gearhead and a tinkerer beyond tinkering

Anyway, I am well aware of what it will do to acceleration and I personally don't mind switching gears... I love dropping a gear and hammering down.

472viper, I do believe it will be a little less responsive, but how much, who knows? I've done the "on paper" math, but that is much different that seat of the pants feel. Most of my riding is done on the highway or long country roads, so I am more concerned about that than buzzing around town.

Also, I would rather have a 3:1 rear drive than a 2.66, but if the 2.66 c90 fits without modification, that would be much easier than finding someone to manufacturer a 3:1.

Dan

Hillis Fabrication LLC
www.hillisfabrication.com
dhillis is offline  
post #7 of 2183 (permalink) Old 06-20-2007, 07:07 AM
Senior VR Member
 
Voyager's Avatar
 
Join Date: Oct 2004
Location: Owensboro
Posts: 613
Thanks: 0
Thanked 0 Times in 0 Posts
I'd like to know the results of all this if, or when someone tries to change out the gears.

All animals deserve our respect. Some animals deserve our help. A few animals deserve a side order of fries.
Voyager is offline  
post #8 of 2183 (permalink) Old 06-20-2007, 09:00 AM
Senior VR Member
 
isobig's Avatar
 
Join Date: Jun 2005
Location: Scranton, PA
Posts: 1,037
Thanks: 137
Thanked 24 Times in 18 Posts
Garage
Please keep us updated!



'01 VL800 Red/Blk - totalled 6/17/2012
isobig is offline  
post #9 of 2183 (permalink) Old 06-20-2007, 09:14 AM
Junior Member
 
Join Date: Sep 2005
Location: Spotsylvania, Va.
Posts: 37
Thanks: 0
Thanked 1 Time in 1 Post
Put me down also as being VERY interested in how this turns out.
I also don't mind downshifting to pass.

06 C50 11/05 to 3/14
14 Harley Street Glide 3/14-
77 Yamaha RD 400 4/83-
RD 400 is offline  
post #10 of 2183 (permalink) Old 06-20-2007, 10:07 AM
Senior VR Member
 
meldooby's Avatar
 
Join Date: Mar 2006
Location: MS Gautier
Posts: 1,106
Thanks: 0
Thanked 0 Times in 0 Posts
I think you will make 5th gear unuseable.
the bike already won't wind all the way out in 5th. If it would, you would be going 122mph when the rev limiter kicked in, which the bike will only do going wown a long steep hill.
You are deluding yourself about the "high revs" at 75mph indicated, the bike is just lazying along.

Naked Jugs Rock!!

2004 Volusia
meldooby is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome