Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
Ultimate HDF Member
Joined: Feb 2007
Posts: 7,663
Likes: 7
From: Northeast Ohio
RE: Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
The 07-08 FLH's have a 34 - 46 tooth primary and a 32 tooth transmission, 66 tooth rear wheel sprocket for a final 6th gear ratio of 2.79.
Going to a 32 tooth engine sprocket changes the final ratio to 2.96, a 30 tooth engine sprocket changes the final ratio to 3.16 and take the engine 6th gear RPMs at 70 MPH to 3250 RPM.
Evolution Industries has an 07-08 30 tooth engine sprocket for $295. I have yet to find a 32 tooth. When I pull my engine down for the new build, I would like to go to a 32 tooth sprocket if I can find one.
Going to a 32 tooth engine sprocket changes the final ratio to 2.96, a 30 tooth engine sprocket changes the final ratio to 3.16 and take the engine 6th gear RPMs at 70 MPH to 3250 RPM.
Evolution Industries has an 07-08 30 tooth engine sprocket for $295. I have yet to find a 32 tooth. When I pull my engine down for the new build, I would like to go to a 32 tooth sprocket if I can find one.
Road Master
Joined: Nov 2005
Posts: 826
Likes: 0
From: Foothills of NC
RE: Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
ORIGINAL: Dalton
Bump
Anyone know of a manufacturer of a 32 engine sprocket for the new style compensator assembly (07 and 08) ?
Bump
Anyone know of a manufacturer of a 32 engine sprocket for the new style compensator assembly (07 and 08) ?
Banned
Joined: Jul 2006
Posts: 869
Likes: 0
From: Discovery Bay, CA
RE: Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
[quote]ORIGINAL: CNC WHEEL GUY
I can cruise 30 MPH in 5th on somewhat level surface. The best part is I really don't need to downshift to accelerate either!!!!!
I don't think so...
I can cruise 30 MPH in 5th on somewhat level surface. The best part is I really don't need to downshift to accelerate either!!!!!
I don't think so...
Ultimate HDF Member
Joined: Aug 2007
Posts: 9,486
Likes: 4
From: Hico, TX (once home to Billy the Kid)
RE: Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
ORIGINAL: Candy Red Road Glide
Dalton did you ever get the answer to your question?
ORIGINAL: Dalton
Bump
Anyone know of a manufacturer of a 32 engine sprocket for the new style compensator assembly (07 and 08) ?
Bump
Anyone know of a manufacturer of a 32 engine sprocket for the new style compensator assembly (07 and 08) ?
By the Master:
https://www.hdforums.com/m_2806196/tm.htm
and his apprentice:
https://www.hdforums.com/m_3121127/mpage_1/key_/tm.htm#3126300
Former Sponsor
Joined: Apr 2007
Posts: 5,360
Likes: 453
From: Davie, FL
RE: Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
To all:
I have a light weight FXR (>500 Lbs) and I am going through this gearing thing. I have a worked 113ci TP evo with a Rev Tech 6 speed. I just changed the final gearing to 0.86:1 from 0.89 (6th). I received speeds/rpmâs out of my old set up with a 17â X 140 880 Metzler tire which is close to a 16â 140.
I have presently a 3.37 final w/o the 6 speed. =
[ul][*]Engine Sprocket/24T,[*]Clutch Sprocket/37T,[*]Trans Sprocket/32t,[*]Rear Wheel Sprocket/70T. [*]I had a 0.89 final for these speeds.[*]I have a Digital Dakota tack/spedo (mini) combo.[*]I set my MPH on my 2500 brand new Dyno so it is exact. It is true & I triple checked it.[/ul]When I did the calculations, @ 2.6K RPM,:
[ul][*]I am suppose to be doing 66.23 MPH but the tack indicates 2.6K rpm is around 60 mph. [*]At 3K rpm I am calculated for 76.49 MPH but I am doing a true 70 mph. [*]I have counted every gear/pulley and they are true as well as my tire circumference till my eyes crossed. I measured everything. [*]Being a worked and light weight bike I can pull the wheel off of the ground by just cracking the throttle around 1500 rpmâs.
[/ul]MY question is can a tach be wrong? I am going for a 34 trans sprocket right now to get some cruising speed & lower my RPMâs at 80 mph. I did the math, used many tables but still they do not coinside with each other. Ideas? Right now I have a 0.86 final (6th), a Front Primary 24T, Rear Primary 37T, Transmission Output 34T, Rear Wheel Pulley 70T, & a 17" X 140 X 90 Profile ME 880 = Rear Tire Diameter: 25.7
" I am expecting 3,000 rpms @ 84.02 MPH. What I will get is another story. See you before the weekend I hope. I bought a new belt also, to be delivered.
Any Ideas?
[IMG]local://upfiles/29413/B516031E5C764DF5B476DF95F3F31209.jpg[/IMG]
I have a light weight FXR (>500 Lbs) and I am going through this gearing thing. I have a worked 113ci TP evo with a Rev Tech 6 speed. I just changed the final gearing to 0.86:1 from 0.89 (6th). I received speeds/rpmâs out of my old set up with a 17â X 140 880 Metzler tire which is close to a 16â 140.
I have presently a 3.37 final w/o the 6 speed. =
[ul][*]Engine Sprocket/24T,[*]Clutch Sprocket/37T,[*]Trans Sprocket/32t,[*]Rear Wheel Sprocket/70T. [*]I had a 0.89 final for these speeds.[*]I have a Digital Dakota tack/spedo (mini) combo.[*]I set my MPH on my 2500 brand new Dyno so it is exact. It is true & I triple checked it.[/ul]When I did the calculations, @ 2.6K RPM,:
[ul][*]I am suppose to be doing 66.23 MPH but the tack indicates 2.6K rpm is around 60 mph. [*]At 3K rpm I am calculated for 76.49 MPH but I am doing a true 70 mph. [*]I have counted every gear/pulley and they are true as well as my tire circumference till my eyes crossed. I measured everything. [*]Being a worked and light weight bike I can pull the wheel off of the ground by just cracking the throttle around 1500 rpmâs.
[/ul]MY question is can a tach be wrong? I am going for a 34 trans sprocket right now to get some cruising speed & lower my RPMâs at 80 mph. I did the math, used many tables but still they do not coinside with each other. Ideas? Right now I have a 0.86 final (6th), a Front Primary 24T, Rear Primary 37T, Transmission Output 34T, Rear Wheel Pulley 70T, & a 17" X 140 X 90 Profile ME 880 = Rear Tire Diameter: 25.7
" I am expecting 3,000 rpms @ 84.02 MPH. What I will get is another story. See you before the weekend I hope. I bought a new belt also, to be delivered.
Any Ideas?
[IMG]local://upfiles/29413/B516031E5C764DF5B476DF95F3F31209.jpg[/IMG]
Thread Starter
|
Road Warrior
Joined: Jun 2006
Posts: 1,797
Likes: 0
From: NH
RE: Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
ORIGINAL: profinish
I don't think so...
ORIGINAL: CNC WHEEL GUY
I can cruise 30 MPH in 5th on somewhat level surface. The best part is I really don't need to downshift to accelerate either!!!!!
I can cruise 30 MPH in 5th on somewhat level surface. The best part is I really don't need to downshift to accelerate either!!!!!
I don't think so...
[/align]accelerate Definition ac¡cel¡er¡ate (ak selâ˛Ér Ätâ˛, -É rÄtâ˛; Ék-) transitive verb -¡atâ˛ed, -¡atâ˛Âˇing[*] to increase the speed of[*] to cause to develop or progress more quickly[*]Physics to cause a change in the velocity of (a moving body)[*] to cause to happen sooner[/ol]
Intermediate
Joined: May 2008
Posts: 47
Likes: 0
From:
RE: Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
Interesting but true. A co-worker has a 2001 w/ 3:37 and a second co-worker has an 05. The 05 can't seem to catch the 01. I know how gearing works and will be doing the swap on my '06 FLTR.
I had a 4x4 with a V8 4.10:1 gears that yielded 12 mpg as expected. I did a gear swap to 4.56:1 for power reasons and not only did it deliver more but my mpg's went to 17mpg. Now you can call B.S. but that is what I got. Which makes me want the 3.37 even more............... Food For Thought.
I had a 4x4 with a V8 4.10:1 gears that yielded 12 mpg as expected. I did a gear swap to 4.56:1 for power reasons and not only did it deliver more but my mpg's went to 17mpg. Now you can call B.S. but that is what I got. Which makes me want the 3.37 even more............... Food For Thought.
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Thread Starter
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Road Warrior
Joined: Jun 2006
Posts: 1,797
Likes: 0
From: NH
RE: Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
ORIGINAL: crzrdude
Interesting but true. A co-worker has a 2001 w/ 3:37 and a second co-worker has an 05. The 05 can't seem to catch the 01. I know how gearing works and will be doing the swap on my '06 FLTR.
I had a 4x4 with a V8 4.10:1 gears that yielded 12 mpg as expected. I did a gear swap to 4.56:1 for power reasons and not only did it deliver more but my mpg's went to 17mpg. Now you can call B.S. but that is what I got. Which makes me want the 3.37 even more............... Food For Thought.
Interesting but true. A co-worker has a 2001 w/ 3:37 and a second co-worker has an 05. The 05 can't seem to catch the 01. I know how gearing works and will be doing the swap on my '06 FLTR.
I had a 4x4 with a V8 4.10:1 gears that yielded 12 mpg as expected. I did a gear swap to 4.56:1 for power reasons and not only did it deliver more but my mpg's went to 17mpg. Now you can call B.S. but that is what I got. Which makes me want the 3.37 even more............... Food For Thought.
I did it, I reported it, and I KNOW it's true.
-Denis
Intermediate
Joined: May 2008
Posts: 47
Likes: 0
From:
RE: Doing a 3.37 primary gearing setup, DO NOT hesitate! Do it!
Found a couple riders that don't like their 3.37 gearing and want to change out to 3.15. 
So that means I will have my parts for the swap (minus that gasket and fluid). All I gotta do is change them out for the guys. So looks like I will be busy next week.But I will be set for the Frog Jumps next weekend.
So that means I will have my parts for the swap (minus that gasket and fluid). All I gotta do is change them out for the guys. So looks like I will be busy next week.But I will be set for the Frog Jumps next weekend.