31/68 sprocket

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May 23, 2012 | 08:19 PM

#21

Joker65

Road Captain

Joined: Sep 2007

Posts: 742

Likes: 4

From: Twin Cities, MN

Quote:

Originally Posted by boogaloodude

On my bike with the 30/68, 80 mph on the freeway is about 3200 rpms. With the 31t, it would drop approx 100 rpms. 3100 vs 3200 at 80 mph is not enough of a difference that one would feel comfy and the other would feel frenetic. Since the whole excercise (for me) was to increase torque, it was an easy choice.

Nice vocab Boogaloo!!

May 23, 2012 | 08:51 PM

#22

skulz1

Tourer

Joined: Aug 2008

Posts: 272

Likes: 7

From: Manistee County, MI.

Does a rider have to re-calibrate the speedo upon completion of this gearing mod?

May 23, 2012 | 09:01 PM

#23

speakerfritz

Road Warrior

Joined: Jun 2009

Posts: 1,943

Likes: 3

From: NYC

yep...have the parts to do the 30T/68T. Got a speacial 3/4 drive with a hole and a 6ft chrome steel solid bar to break that bad boy with.

May 23, 2012 | 11:29 PM

#24

silverado636

Cruiser

Joined: Mar 2010

Posts: 113

Likes: 0

From: Swift Current, Sask Canada

30t part#

Can someone give part# 's and suppliers? I want the 30t up front as I have a 68t in back already.
thanks

May 24, 2012 | 01:20 AM

#25

mike5511

Elite HDF Member

Joined: Jun 2007

Posts: 3,873

Likes: 13

From: NW Arkansas

I've got a 31T, to go with my 68T, but haven't put it on yet. Will do so this winter most likely. Somebody asked about speedo and yes, it will throw it off. Not a big deal to me. There can also be some issues with cruise control that need addressed as well. (I forget all the particulars and would have to go back research it again.) Different year models require different solutions if I remember correctly.

May 24, 2012 | 02:03 AM

#26

Mike

Ultimate HDF Member

Joined: Jun 2009

Posts: 6,786

Likes: 40

From: Centralia, Wa

Quote:

Originally Posted by mike5511

Somebody asked about speedo and yes, it will throw it off. Not a big deal to me. There can also be some issues with cruise control that need addressed as well.

I don't know about the cruise issue (don't have cruise), I was able to reprogram my speedo through a tts calibration. 6th gear light works properly, too.

Quote:

Originally Posted by Joker65

Nice vocab Boogaloo!!

lol, I guess those remedial english correspondence courses are going to come in handy after all.

Last edited by Mike; May 24, 2012 at 02:08 AM.

May 24, 2012 | 08:29 AM

#27

gmc

Road Warrior

Joined: May 2008

Posts: 1,802

Likes: 2

From: Salt Lake City, UT. Dushore, Pa.

Quote:

Originally Posted by skulz1

Does a rider have to re-calibrate the speedo upon completion of this gearing mod?

Your speedo will be fast, mine was 2-3 mph fast with the stock gearing, with just the 68t rear sprocket change I was about 8 mph fast. I had the SERT so had to send it to TTS to upgrade to Master Tune ($100), then the dealer can change the settings in the map. Note: you have to have the dealer run TTS program before you send it in to verify you Sert is upgradable.

Cruise control doesn't set above 85 mph so if you want to cruise 80 you need to recalibrate your speedo else you setting it at 85 your probable doing 77 mph.

May 24, 2012 | 01:24 PM

#28

nvsteve

Seasoned HDF Member

Joined: Oct 2006

Posts: 5,977

Likes: 85

From: Nevada

Quote:

Originally Posted by skulz1

Does a rider have to re-calibrate the speedo upon completion of this gearing mod?

Quote:

Originally Posted by skulz1

Does a rider have to re-calibrate the speedo upon completion of this gearing mod?

I have the stock (32) and changed to a 68T rear on my 07. According to my GPS when the speedo reads 75 I'm actually going 70.

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May 24, 2012 | 06:54 PM

#29

Brick0044

Road Captain

Joined: Dec 2009

Posts: 512

Likes: 6

From: Minnesota

Quote:

Originally Posted by Joker65

Just ordered my 30T for my 2009 FLHR!! Looking forward to this project... and the outcome!

You will love it. Just gives you that little boost that you're lacking. I like mine. Hope we get a nice weekend, I'm in the cities too.

May 24, 2012 | 07:02 PM

#30

qtrracer

Ultimate HDF Member

Joined: Jan 2008

Posts: 6,532

Likes: 132

From: SoCal

Quote:

Originally Posted by nvsteve

I have the stock (32) and changed to a 68T rear on my 07. According to my GPS when the speedo reads 75 I'm actually going 70.

Sounds about on par with what I have observed when I have been thru those radar "Your Speed __" things on the side of the roads. I have the 32/68 set up at this time.

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