Six speed
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Road Master
Joined: Apr 2011
Posts: 911
Likes: 10
From: Wisconsin
Six speed
I have an 04 EG with the 5 speed and on the freeway I like to cruise around 70mph. I see RPM's anywhere from 2900-3100 at 70mph depending on wind and hills and so on.
My question is--- I am looking at a new frame bike (09-up) which will come with a six speed and was wondering what will 70mph give me for an RPM? Just curious..
My question is--- I am looking at a new frame bike (09-up) which will come with a six speed and was wondering what will 70mph give me for an RPM? Just curious..
I have an 04 EG with the 5 speed and on the freeway I like to cruise around 70mph. I see RPM's anywhere from 2900-3100 at 70mph depending on wind and hills and so on.
My question is--- I am looking at a new frame bike (09-up) which will come with a six speed and was wondering what will 70mph give me for an RPM? Just curious..
My question is--- I am looking at a new frame bike (09-up) which will come with a six speed and was wondering what will 70mph give me for an RPM? Just curious..
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
Likes: 402
From: Phoenix '53, '88, '09 Big Twins
1.) if your rpms are different at 70 mph, you have clutch slipping or other problems
It's math, the turning of the motor ( rpm) is reduced by set values ( gears) to a set road speed ( mph).
2.) 70 mph= 2700 rpms
andrews cams has a handy chart for rpm/mph various models:
http://www.andrewsproducts.com/PDF_f...osMPG-pg28.pdf
2700 rpms ( for the 96") is a little low unless on level ground, no unusual head wind. When cruising I usually stay 2800~3200 rpms
mike
It's math, the turning of the motor ( rpm) is reduced by set values ( gears) to a set road speed ( mph).
2.) 70 mph= 2700 rpms
andrews cams has a handy chart for rpm/mph various models:
http://www.andrewsproducts.com/PDF_f...osMPG-pg28.pdf
2700 rpms ( for the 96") is a little low unless on level ground, no unusual head wind. When cruising I usually stay 2800~3200 rpms
mike
Last edited by mkguitar; Apr 30, 2012 at 12:07 PM.
Tourer
Joined: Apr 2012
Posts: 325
Likes: 2
From: Texas
Depends on the year and model as the ratios are different. My 07 runs around 2600 at 70 in 6th which matched pretty closely to the link mkguitar posted. According to that same link the 09+ baggers are geared slightly different and run 2700 at 70. Personally I think the 6 speed is the greatest thing HD has done on the big twins in the last decade.
Banned
Joined: Mar 2012
Posts: 11,232
Likes: 16
From: Socialist Republic of the USA
I bet there would be with a Baker 7 speed.
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4th Gear
Joined: Jan 2012
Posts: 8
Likes: 0
From: NW WI
My '12 Ultra Classic is at 2500 RMP @ 70mph. that is with TD, heavy breather, SERT, rush slip-ons.
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Road Captain
Joined: Jan 2009
Posts: 739
Likes: 2
From: St. Louis
Baker's 7 speed and HD's CruiseDrive gear ratios are both 1:1 in their respective top gears. Therefore their 'running down the highway' RPM's will be the same. The gear spreads in each are different, of course, and the 7 speed will pull better through the gears because there isn't as much RPM drop between shifts.
