Touring Models Road King, Road King Custom, Road King Classic, Road Glide, Street Glide, Electra Glide, Electra Glide Classic, and Electra Glide Ultra Classic bikes.
Sponsored by:
Sponsored by:

27 tooth compensator to lower rpms

Thread Tools
 
Search this Thread
 
Old Jul 31, 2013 | 08:05 AM
  #1  
fwb35's Avatar
fwb35
Thread Starter
|
Road Warrior
Joined: Jun 2012
Posts: 1,672
Likes: 18
From: Orange, VA,
Default 27 tooth compensator to lower rpms

Has anyone done this? I have a 99 EG Standard with carb, I ride a lot on the highway and would love to lower the rpms, this kit comes with sprocket and chain for about $125. From my research this is the cheapest and least amount of work to do this, it also will not change the speedo reading. Any downside other then loosing a little torque taking off, am not worried about down low, the bike has SE 204 cams in it now and for me has plenty of power for how I ride. Is it harder on the starter or cause any problems any where else? Thanks
 
Reply
Old Jul 31, 2013 | 08:40 AM
  #2  
Def Mute's Avatar
Def Mute
Outstanding HDF Member
Joined: Nov 2012
Posts: 2,422
Likes: 14
From: Fla
Default

I'm runnin a Baker DD6 with a 27 tooth primary chain...

Been running it for a little more than 3 years now, no probs with starter at all. Other than that, I can't add anything, since I have the DD6 gear set the rest is not the same as your 5 speed gear box.
 
Reply
Old Jul 31, 2013 | 09:06 AM
  #3  
btsom's Avatar
btsom
Grand HDF Member
10 Year Member
Community Builder
Liked
Top Answer: 1
Joined: Jan 2012
Posts: 4,459
Likes: 2,892
From: Oklahoma
Default

I see that the only one chiming in so far is from the "flat land". You are in a hilly/mountainous area. How much 2 up do you do and how much playing in the friction zone do you do now when starting from a standstill? Regardless of cam, air filter, exhaust and on and on you have, it will require more friction zone time to get going. If 1st gear seems almost too low now, this will help make it "about right". If 1st seems too high now, this will make it worse. The only way to retain starting from a standstill low gear and lower cruise RPM is a different transmission. I hope someone living in similar terrain to your area provides his input. The rest is up to you, if you are 2 up on an up hill slope, how easy is to start moving now? Can you afford to sacrifice some of that capability?
 
Reply
Old Jul 31, 2013 | 09:58 AM
  #4  
fwb35's Avatar
fwb35
Thread Starter
|
Road Warrior
Joined: Jun 2012
Posts: 1,672
Likes: 18
From: Orange, VA,
Default

Have never had a problem with starting off in 1st gear, actually to me 1st gear is over kill with how quickly I have to shift into 2nd, even 2 up, so I don't think that will be a problem, I did not buy a Harley to hot rod or race, I have a race car for that, I just want to make it more friendly while out on the highway and not spend thousands doing so like a Baker 6 speed, I love this bike and plan on keeping it to ride, not race, is older and a carb, I like simplicity, that makes it easier for me to work on. Thanks for all your replies.
 
Reply
Old Jul 31, 2013 | 10:27 AM
  #5  
Am4wag's Avatar
Am4wag
Tourer
Joined: Sep 2007
Posts: 415
Likes: 13
From: Northeastern Md.
Default

If it will be of any input for you,I run a 47T out back with 24T on the tranny-I run stock no's. for the primary-all late 90's softail running gear.But this is on my chop/about 200+ lb's. lighter.Kind of like going from a 4:11 to a 3:73 rear differential in an older car.Hiway sweetspot is around 65-70.
 
Reply
Old Jul 31, 2013 | 10:56 AM
  #6  
mkguitar's Avatar
mkguitar
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
Default

you could look at a 65T rear pulley, this is a quick and easy swap...minutes.
Just over 7% overdrive

you will probably have to loose or alter the belt guard.

you will need another inch of adjustment on the axle for belt tension. ( or an idler wheel, like Buell)

I ran one on my stage 1 1995 FLHTC to good result, and we have mountains here.

part number: 40315-94

pic of one: http://phoenix.craigslist.org/nph/mcy/3964341244.html


I run a 61T on my FXR, a 15% overdrive. Nice to get all the way through an intersection before shifting. This is a worked motor and a lightweight bike. and this one sees lots of mountains and canyons...I did this swap in 1993, back before we had the aftermarket and 6 speed overdrive options.
I use the shorter softail belt

so more than one way to skin a cat

Mike
 

Last edited by mkguitar; Jul 31, 2013 at 12:38 PM.
Reply
Old Jul 31, 2013 | 11:07 AM
  #7  
fwb35's Avatar
fwb35
Thread Starter
|
Road Warrior
Joined: Jun 2012
Posts: 1,672
Likes: 18
From: Orange, VA,
Default

Mike, I have a 70 tooth rear pulley now, wouldn't I have to chage the belt with a 65 tooth? With the comp sprocket I just have to pull the primary cover off replace the chain and comp sprocket, this mod also does not change my speedo reading, seems like less work and lower cost. Please set me straight here lol

Thanks, Frank
 
Reply
Old Jul 31, 2013 | 11:32 AM
  #8  
mkguitar's Avatar
mkguitar
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
Default

Originally Posted by mkguitar
you will need another inch of adjustment on the axle for belt tension. ( or an idler wheel, like Buell)

an additional inch over where you are now with the 70T.

on my '95 I had the adjustment room- I have seen a rider who used an idler wheel on the lower span of the belt...'cause all the pulling force is on the top span

look at your adjusters where they sit now

if you have room, this takes minutes to swap the pulley

as GR refers below: 61T was on some Intl models, the 65T was on some softail models.
in the first case to pass noise emission standards overseas, in the 2nd in an attempt to make Domestic riders happier, dealing with the evo solid mount buzz



mike
 

Last edited by mkguitar; Jul 31, 2013 at 12:41 PM.
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Jul 31, 2013 | 12:15 PM
  #9  
grbrown's Avatar
grbrown
Club Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2007
Posts: 45,429
Likes: 2,898
From: Bedford UK
Default

When my 1990 bike was new it came with a 61T rear pulley. Gearing was too high IMHO. I now run with a stock US spec 70T. I have also gone from an 80" to an S&S 107" and everything is fine!

I really do recommend you leave things as they are. Your bike will thank you for doing so! I can see no advantage in raising gearing by 2 teeth, the darned thing isn't a multi-cylinder diesel!

On anything other than short trips, we should all be wearing ear plugs, the best tuning aid known to man! As a race-car driver you should know that, so try wearing them while out on your Harley. You'll be surprised how friendly she can be.....
 
Reply
Old Jul 31, 2013 | 12:35 PM
  #10  
Am4wag's Avatar
Am4wag
Tourer
Joined: Sep 2007
Posts: 415
Likes: 13
From: Northeastern Md.
Default

Originally Posted by Am4wag
If it will be of any input for you,I run a 47T out back with 24T on the tranny-I run stock no's. for the primary-all late 90's softail running gear.But this is on my chop/about 200+ lb's. lighter.Kind of like going from a 4:11 to a 3:73 rear differential in an older car.Hiway sweetspot is around 65-70.
My mistake-thought you were referring to chain rear........
 
Reply



All times are GMT -5. The time now is 01:56 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE