True, but HD reduced the gearing in the primary from 1.44 to 1.36, so the effect is the same. 6th gear is a direct drive, so the path the energy takes to get to the wheel is much shorter than if they'd used a true overdrive. This reduces friction and wear points when you are running down the highway. They also changed the final drive gearing. It all adds up to a ratio of 2.96 in 6th gear, compared to a ratio of 3.05 on the 5-speed. Gives you about 300 rpms less at 70mph.

 

Mind if I resurrect this one?

Any feedback on the Harley 6spd vs the Baker DD6 kit? I'm just doing some initial research. The DD6 is a 1:1 6th, but increases the primary ratio to lower RPM from 3398 to 2917 at 75MPH per their website.

http://www.bakerdrivetrain.com/dialup/dd6/index.html

I also like the direct drive concept...




And would ya go with a DD6 or an OD6 and why?

Sorry I'm full o' questions today.. I got the 6-speed / overdrive sprocket bug in a bad way after 800 miles listening to my engine scream at 75mph.