Different rear drive ratio/highway cruising - Page 2 - Suzuki Volusia Forums : Intruder Volusia and Boulevard Forum
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post #11 of 2183 (permalink) Old 06-20-2007, 11:23 AM
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My hats off to you for wanting to find a remedy to an issue that ALOT of people here complain about and that is the engine loosing its V-twin throb at highway speeds and developing a high RPM buzz instead. If you are willing to attempt it, I say go for it. Nay sayers never come up with cool ideas anyway. I for one would love for you to pursue this, I will keep track of your posts.

Oh.. WELCOME TO THE SITE!!!!

{{sitting beer down}}Watch this ya'll.
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post #12 of 2183 (permalink) Old 06-20-2007, 01:59 PM
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I'm interested also... Let me know how it turns out!!!

Also... How much would something like this cost???

RON

2005 Suzuki C50 Blue/Black [2/2005 - 9/2007 (SOLD)]
2008 HD FLHR POS (Peace Officer Edition Road King) [9/2007 (ordered) - 11/2007 (delivered) - PRESENT]
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post #13 of 2183 (permalink) Old 06-20-2007, 05:20 PM Thread Starter
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Thanks for the encouragement fella's, I have read (and searched) quite a bit on this site for the last week. It is obvious that I am not the only one that believes this bike needs a taller gear. Judging by the posts, 9 out of the 11 posts are in favor (or interested) in a taller gear. I'd say that's a good reason to go for it.

meldooby, please don't think I am calling you out, however... If you have read my previous posts, you would have found that I do most of my riding above 60MPH (65-66 indicated). At these speeds I have noticed the floorboards, gas tank, both seats, and frame to be more buzzy than I would prefer. I also stated that I have previous experience with a 98' Honda Valkyrie that had absoluetely no buzz on the highway. Anyway, I'm an not interested in winding out my v-twin in fifth, that would be for someone who cruises the Boulevard (no pun intended) on a regular basis.

Also, as stated earlier, I would like a 3:1 rear drive rather than a 2.66, but at this point, the 2.66 is a more viable option... that is, until I start tearing the rear drive down. I also have a theory which is completely unproven, I would have to know the ring and pinion specs of the c50 and c90 to prove/disprove this theory:

The c50's final drive is 3.503, the c90's is 2.66. That is a difference of .837, divided by two (the average) is .419, which gives you a gear of 3.084... very close to 3:1 and darn near right at 3500RPM @65MPH, which is desired. Now the theory... does the c50 and c90 have different ring gears and different pinion gears, or are the pinion gears (on driveshaft) the same on both machines. "If" they are different and the c50 has a lower pinion gear, mated with the c90's taller ring gear, this may solve the problem entirely and produce a 3:1 ratio. Remember this is all speculation at this point, as I have not even looked at a set of gears for these bikes yet.

Sorry for the long post,
Dan

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post #14 of 2183 (permalink) Old 06-20-2007, 05:26 PM Thread Starter
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5-0, are you a LEO? If so, greetings from a brother. As far as cost of this, I have no idea. The only thing I can tell you right now is that the ring gear for the c50 and c90 is between $130-160.

Dan

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post #15 of 2183 (permalink) Old 06-20-2007, 05:30 PM
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Keep us posted. (this post is also to keep this in my post search )
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post #16 of 2183 (permalink) Old 06-20-2007, 05:40 PM
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Re: Different rear drive ratio/highway cruising

Quote:
Originally Posted by dhillis
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
Just buy a smaller speedometer gear. Problem solved.

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post #17 of 2183 (permalink) Old 06-20-2007, 05:42 PM
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Quote:
Originally Posted by Mort
Keep us posted. (this post is also to keep this in my post search )
same here, I am very excited for a gear head to take this on. Tinker away and keep us posted, and best of luck I'm sure a lot of us (including me) are hoping for a perfect fit
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post #18 of 2183 (permalink) Old 06-20-2007, 05:44 PM Thread Starter
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treebeme, I'm hoping you were just kidding. The c50 doesn't have a speedometer gear (it's electronic on the front wheel) and what purpose would it serve anyway?

Dan

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post #19 of 2183 (permalink) Old 06-20-2007, 05:46 PM
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Quote:
Originally Posted by dhillis
treebeme, I'm hoping you were just kidding. The c50 doesn't have a speedometer gear (it's electronic on the front wheel) and what purpose would it serve anyway?

Dan
I think he was saying that if you swapped out the speedometer gear, you would get a higher indicated speed to RMP ratio.
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post #20 of 2183 (permalink) Old 06-20-2007, 05:53 PM
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Quote:
Originally Posted by dhillis
treebeme, I'm hoping you were just kidding. The c50 doesn't have a speedometer gear (it's electronic on the front wheel) and what purpose would it serve anyway?

Dan
It was a joke. Apparently, a bad one.

These go to eleven.
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