Changing Gear Ratio
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Road Warrior
Joined: Feb 2010
Posts: 1,953
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From: Houston, TX
Changing Gear Ratio
Just wondering- I haven't read about many people doing this... I changed my front motor sprocket on my 98 Hertiage from a 25 tooth to a 21 tooth - the low end torque went through the roof!!! I loved it!!!!! My top end suffered, but I like low end torque, and so I liked it!!!!
I have thought about doing something like that with this bike.... Since it has plenty of top end, I don't think it would suffer that much with a similar set up....
This Motor Sprocket and new Primary chain changed my gearing in my Heritage from a 1.44 to a 1.7....... I don't even know what my '12 RKC gearing ratio is....
Just wondering if anyone has done anything ilke this..... Chaning the rear wheel pully and belt seems a lot more expensive..
I have thought about doing something like that with this bike.... Since it has plenty of top end, I don't think it would suffer that much with a similar set up....
This Motor Sprocket and new Primary chain changed my gearing in my Heritage from a 1.44 to a 1.7....... I don't even know what my '12 RKC gearing ratio is....
Just wondering if anyone has done anything ilke this..... Chaning the rear wheel pully and belt seems a lot more expensive..
Extreme HDF Member
Joined: Apr 2006
Posts: 10,449
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From: Roswell, GA
Can't speak to the '07 and newer models changing primary gearing.
On '06 model and older models it was popular to swap out the primary gearing from 3.16 to 3.37. The latter was used on the early EFI Touring bikes to create more torque. The latter EFI models up to '06 made adequate power to support the higher gearing until HD went to the 6-speed in '07.
Check Baker's website; probably something they've done.
Carl
On '06 model and older models it was popular to swap out the primary gearing from 3.16 to 3.37. The latter was used on the early EFI Touring bikes to create more torque. The latter EFI models up to '06 made adequate power to support the higher gearing until HD went to the 6-speed in '07.
Check Baker's website; probably something they've done.
Carl
Seasoned HDF Member
Joined: Apr 2012
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From: Michigan
My '92 Heritage was geared much lower than my '95 Heritage.
I think the "overall" gearing change was made in the '93 model year.
When I got my 2000 Ultra, T/C 88, I thought about changing the sprocket(s) to gear the bike for lower RPM's at freeway speeds but everyone I talked to said that I'd lose so much low end power that it wouldn't be be worth it.
I opted for the Baker DD6 and realized immediately that my engine needed some more get-up-and-go, so I had the 1550 kit installed and that did the job
I think the "overall" gearing change was made in the '93 model year.
When I got my 2000 Ultra, T/C 88, I thought about changing the sprocket(s) to gear the bike for lower RPM's at freeway speeds but everyone I talked to said that I'd lose so much low end power that it wouldn't be be worth it.
I opted for the Baker DD6 and realized immediately that my engine needed some more get-up-and-go, so I had the 1550 kit installed and that did the job
Club Member
Joined: Jun 2007
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From: Bedford UK
I also used that 21T compensator in my TC88 - great mod! Unfortunately from what I have read the possibilities with TC96s and later are not so good. Harley changed the compensator design for a clunky great thing that is not available in smaller sizes, except a solid 30T, in other words with no compensation!
There are various threads on making small changes to lower gearing, like using a smaller front pulley, different rear pulley, plus the clutch sprocket. None of these makes a big difference and all together they don't add up to so very much either. There may be no way of getting that 25/21 jump you so enjoyed.
Our big twin gearing has been getting steadily taller since Evo days, all in the name of reducing noise for EPA testing and recent design changes by Harley have made improvement more difficult.
There are various threads on making small changes to lower gearing, like using a smaller front pulley, different rear pulley, plus the clutch sprocket. None of these makes a big difference and all together they don't add up to so very much either. There may be no way of getting that 25/21 jump you so enjoyed.
Our big twin gearing has been getting steadily taller since Evo days, all in the name of reducing noise for EPA testing and recent design changes by Harley have made improvement more difficult.
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Road Warrior
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Road Warrior
Joined: Feb 2010
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From: Houston, TX
Looks like going from a 32T front belt pulley also requires a shorter belt....
I read this on another related post.
"it's a common practice to change the 32T/66T to 30T/68T. No belt changes needed."
Anyone know what the new RKs have in the rear?? It would be nice to do this and keep the stock belt....
I read this on another related post.
"it's a common practice to change the 32T/66T to 30T/68T. No belt changes needed."
Anyone know what the new RKs have in the rear?? It would be nice to do this and keep the stock belt....
Seasoned HDF Member
Joined: Oct 2006
Posts: 5,977
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From: Nevada
Looks like going from a 32T front belt pulley also requires a shorter belt....
I read this on another related post.
"it's a common practice to change the 32T/66T to 30T/68T. No belt changes needed."
Anyone know what the new RKs have in the rear?? It would be nice to do this and keep the stock belt....
I read this on another related post.
"it's a common practice to change the 32T/66T to 30T/68T. No belt changes needed."
Anyone know what the new RKs have in the rear?? It would be nice to do this and keep the stock belt....