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Old 05-01-2012, 02:34 PM   #1
NodakSpeedFreak
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6 Speed Transmission revisited

Ok, I know there are alot of posts on 6 speed transmissions for the Vrod, but I have a question for you more knowledgeable types. I did a google on 6 speed transmission for vrod and it took me to jpcycles.com to a generic right side 6 speed transmission. Just wondering if this would work on a 2011 Nightrod Special? Would be nice to know before I spend close to $1k.
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Old 05-01-2012, 02:39 PM   #2
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Nope. HD Aircooled types have a separate housing for the tranny and it can be changed out to whatever you want/afford.

Vrod tranny is integrated into the engine case, so you're stuck with 5.
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Old 05-01-2012, 02:51 PM   #3
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Can you change the gears themselves? I think V/H CHANGE THE 2ND gear???
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Old 05-01-2012, 03:00 PM   #4
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yeah. just a higher 5th gear cog would be cool. bring it down a couple thou rpm's at 70 mph?
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Old 05-01-2012, 03:37 PM   #5
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Quote:
Originally Posted by mardymac42 View Post
yeah. just a higher 5th gear cog would be cool. bring it down a couple thou rpm's at 70 mph?
Much easier and cheaper to change the final drive gearing.Even a chain conversion to run whatever sprockets you want would be way cheaper than a new gearbox.......
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Old 05-01-2012, 03:52 PM   #6
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Quote:
Originally Posted by cycorod View Post
Can you change the gears themselves? I think V/H CHANGE THE 2ND gear???
Yes they did, but this gear is designed to facilitate racing, the stock 2nd gear has more narrow teeth in a helical cut which have been known to break under racing conditions.

VH, makes two versions of 2nd gear one which complies the Destroyer setup and is an acceptable substitute to remain in SPEC compliance with VRD class racing rules. The gear on the far right is the new VH 2nd gear.



The other, also a straight cut gear is designed for street bikes that might be under greater stress due to BiG bore, Nitrous or Turbo applications that are being raced.

The ratio changes on these gears are negligible.

I'm with the other guys who suggest changing your final drive ratio to get the high gear engine RPM's down, but don't compare the RPMs to an EVO or TC, the Revolution engine is much happier at a higher number, get acclimated to it.
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Old 05-02-2012, 11:26 AM   #7
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I'm still waiting to acquire pieces/parts so I can get with a gear vendor to investigate different gearing. I'm not really willing to pull the working engine out to do this....

Changing either pulley only changes final drive, I want my cake and eat it too.... lower 1st gear like running a 26t pulley, and then 5th to be like when running a 30t.
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Old 05-02-2012, 12:08 PM   #8
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Even if you could find a vendor to make custom gears, you won't have clearance in the case.
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Old 05-03-2012, 09:50 AM   #9
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Make a case with room? Would a higher ratio 5th gear seriously just not fit? Sorry, I haven't been in a tranny yet myself.


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Old 05-03-2012, 01:16 PM   #10
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Even if you could find a vendor to make custom gears, you won't have clearance in the case.
Thats the answer I've been looking for for a good while! I asked this very same question about a year or so ago--and asked if there were any physical limitations inside the tranny case to prevent a taller 5th from being installed.... money considerations for the gear itself aside... nobody ever gave me a straight answer. What part causes the interference? Is it just a very tight tolerance to the case?
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Old 05-03-2012, 03:23 PM   #11
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Originally Posted by myvrodrocks View Post
Even if you could find a vendor to make custom gears, you won't have clearance in the case.


BINGO zero room I have wrenched on more transmissions then I care to talk about and there is literally no additional room for a taller 5th gear per say.
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Old 05-03-2012, 03:37 PM   #12
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The 6th gear is as easy to build than a 3rd cylinder.
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Old 05-03-2012, 03:56 PM   #13
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Check out the photo above. I circled the edge of fifth in the attachment. This the gear that needs to grow and its opposing gear to shrink. If I am not mistaken, 5th is part of the shaft meaning you would need to manufacture the whole output shaft...I could be wrong.

Anyway, in my attachment I circled where the gear would hit the case. Looks as if there is room. but you can't see down around the bottom. It's very close.
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Old 05-03-2012, 04:10 PM   #14
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The 6th gear is as easy to build than a 3rd cylinder.
Maybe...but that has been done...

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Old 05-03-2012, 05:22 PM   #15
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I think our bikes with 5 gears is perfect. I used to wish for a 6th gear out on the highway, but what would it really do for us? Maybe drop the revs by 300-400 rpms & 75mph? It's not worth it. In 5th gear @ 50 mph I'm @ 3000 rpm. (In these bikes thats on the verge of lugging the motor (bad) If you had a 6th gear & shifted into it you'd be lugging the motor @ say 2500-2600rpm. That would do damage to the motor over time. I hope HD never adds a 6th gear.
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