Six speed ratios
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Road Master
Joined: Apr 2011
Posts: 911
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From: Wisconsin
Six speed ratios
Are the gear raitos 1 thru 5 the same on a six speed as a 5 speed?
For instance on my 5 speed I run 2900 at 70 no wind level surface. Is 5th gear the same in a six speed?
For instance on my 5 speed I run 2900 at 70 no wind level surface. Is 5th gear the same in a six speed?
Seasoned HDF Member
Joined: Oct 2006
Posts: 5,977
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From: Nevada
No. The ratios are higher in each gear in the 6 speeds. 07 and 08 bikes in particular. In 09 the rear pulley is 2 teeth more so overall gearing is somewhat closer to the 5 speeds but still taller.
Extreme HDF Member
Joined: Sep 2010
Posts: 14,744
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From: Phoenix '53, '88, '09 Big Twins
if you google
28_RatiosMPG-pg28
you will find a chart at the andrews cam website that has ratios, and MPH vs RPM data for Harley models the past 30 years.
the 5 speed vs 6 speed depends on whether the 6 speed is an "overdrive" with a .86 final or a "close ratio" with a 1:1 6th
mike
28_RatiosMPG-pg28
you will find a chart at the andrews cam website that has ratios, and MPH vs RPM data for Harley models the past 30 years.
the 5 speed vs 6 speed depends on whether the 6 speed is an "overdrive" with a .86 final or a "close ratio" with a 1:1 6th
mike
Seasoned HDF Member
Joined: Apr 2008
Posts: 10,135
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From: Sandpoint, Idaho
No they are not the same.
5th gear 5 speed =3.150
5th gear 6 speed dresser=3.407
5th gear 6 speed Dyna=3.307
Six speed info is directly from HD wedsite.
To my knowledge Harley has never made an "overdrive" trans.
5th gear 5 speed =3.150
5th gear 6 speed dresser=3.407
5th gear 6 speed Dyna=3.307
Six speed info is directly from HD wedsite.
To my knowledge Harley has never made an "overdrive" trans.
Seasoned HDF Member
Joined: Dec 2007
Posts: 8,341
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6th and( 5th on a 5 speed) are 1-1,but the difference comes from the primary and final drive ratios,harley cheeped out the 6 speed it is not an overdrive,they lowered first -fifth.and made the final and primary taller.
Intermediate
Joined: Dec 2018
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From: San Diego
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Intermediate
Joined: Dec 2018
Posts: 37
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From: San Diego
As the engines get bigger... more HP and Torque, they are able to handle higher gears and run at lower RPM at cruising speeds.
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