fxrs gearing : V-Twin Forum: Harley Davidson Forums

sdlowrider · 08-04-2008, 01:36 PM

I have a basically stock 1993 fxrs conv. and HATE the stock gearing. I recently got a 65 tooth rear pully and want to put it on the bike... who had done this and did you have to change the belt length, if so what size did u go to?

hardluk1 · 08-04-2008, 06:45 PM

I guess you got my message.

Homesick · 08-05-2008, 02:46 PM

Well guys, thanks for sharing.

joe

ClassicRider · 08-07-2008, 02:47 AM

sdlowrider,

Your stock gearing was or is 3.37 gearing.....so what is it you don't like about it, also here is a pretty good thread on the topic of gearing you might find interesting, hopefully it is helpful.

click, view, and read if you like:
http://groups.msn.com/harleytechtalk...2&all_topics=0

Homesick, do you have any questions about with gearing that you care to discuss?

Regards,

"Classic"

Homesick · 08-07-2008, 04:38 PM

I'm interested in the topic in general.

My '93 FXR is geared low enough that 60 MPH is over 3000 RPM. I kinda want a 6 speed so I can drop hiway rpm and keep acceleration gearing, both.

But then, it's much cheaper to just do belt/pulley change.

I'm not near a decision. Just gathering data and opinions.

joe

sdlowrider · 08-07-2008, 08:16 PM

way too short on the highway spinnin it too damn hard and in town im up into 5th when my friends are still in 3rd or 4th im hoping to put a 65 tooth pully on the back just as soon as i can get my ass off of it long enuff to do so

hardluk1 · 08-08-2008, 07:46 PM

Did you get my pm on the 4th.

ClassicRider · 08-09-2008, 05:08 AM

Homesick,

UPDATE:
In my opinion, you really don't need a 6th gear for these light bikes.....in fact I have been trying to gather information about how all of the owners of these FXR's that do have 3.37 gearing are doing at highway speed. I recently went through this modification on my 2002 RKC and went from 3.15 gearing to 3.37 gearing, for this "heavier" bike I like it very much it does what I was hoping it to do without affecting me negatively going at 70-80 mph in the area of "vibration" or higher revs given that at such speeds I am increasing my RPM's approximately 250.....so all is well on that bike, now turning my attention back to your 93 model of FXR, I would assume you took a "peek" at the thread I linked above it is a good thread talking exactly about these issues.....

If you feel like you want to get the RPM's down.....you will have the same limiting factors that the owner of the 93 FXR was having as well in the above "linked" thread. I might explore trying to get your gearing back up to a 3.037 final gear. One can accomplish this by modifying the Transmission Pulley from a 32 Tooth and to a 33 Tooth "BDL" which is lighter than an Andrews and the stock pulley. The "lighter" weight of this pulley will help in removing the "extra" weight associated with the stock transmission pulley which when combined with the other pulleys will further reduce the effects of wearing down the main drive gear bearing. Of course, Less rotating mass means more power to push the bike forward. It will also require a belt change from 139 Tooth stock to a 133 Tooth I believe, but I am not sure of this....But I will say at least in my opinion there is no need to going to 6 gears.....not on these bikes.....

....and you are right it's MUCH MUCH MUCH MUCH cheaper to stay away from a 6 gear set up....the other thing you need to analize is just how often are you going 75-85 mph....

3000 RPM's is for your evo is well within the range of acceptability and for some they might even consider this the "sweet spot" of their engine's running performance.....Thus I am not entirely certain that 3,000 RPMS should be considered "too high.

Regards,

"Classic"

hardluk1 · 08-09-2008, 10:12 AM

Classic ,it cost a darn site less money to changeing the rear pully than the front pulley on the belt. Most of the bikes have enough ajustment to do it . I got my 65t pulley on ebay ,it was off a 91 softail and was new for 25 bucks. Also if changeing to a 6 speed install the 2.94 gear set and your bike will pull higher in first. I did this change on my bagger i had ,it would easly pull 33mph in 1st with out pull'n to many rpm's But i would never install a 6 speed with out alot more hp. A basicly stock motor has to work hard to pull 6th and you have to downshift to pass. I know that to the stupid way. Do your motor work first.But the 6 speed will let you cruise at a much lower rpm on the interstate. Would any of us want to get stuck in say atlanta's loop at rush hour on a stockgeared fxr,,,not me.

Homesick · 08-09-2008, 04:12 PM

Quote:

Originally Posted by ClassicRider

Homesick,

You really don't need a 6th gear for these light bikes....not at all....in fact I have been trying to gather information about how all of the owners of these FXR's that do have 3.37 gearing are doing at highway speed. I recently went through this modification on my 2002 RKC and went from 3.15 gearing to 3.37 gearing, for this "heavier" bike I like it very much it does what I was hoping it to do without affecting me negatively going at 70-80 mph in the area of "vibration" or higher revs given that at such speeds I am increasing my RPM's approximately 250.....so all is well on that bike, now turning my attention back to your 93 model of FXR, I would assume you took a "peek" at the thread I linked above it is a good thread talking exactly about these issues.....

If you feel like you want to get the RPM's down.....you will have the same limiting factors that the owner of the 93 FXR was having as well....I would try to get your gearing back down to what I believe was 3.08 which if I recall correctly would require modifying the Transmission Pulley from 32 Tooth and putting a 33 Tooth one in. But I will say at least in my opinion there is no need to going to 6 gears.....not on these bikes.....

....and you are right it's MUCH MUCH MUCH MUCH cheaper to stay away from a 6 gear set up....the other thing you need to analize is just how often are you going 75-85 mph....not that often.....

3000 RPM's is for your evo is absolutely perfect.....why are you even having the discussion that 3,000 seems perhaps too high? It's absolutely not.....anyway now we are into philosophy and he says she says.....

Regards,

"Classic"

Well, for clarity's sake, mines a little heavier as it's been transformed into an FXRT.

I haven't read the other thread yet but will as soon as I finish today's jaunt thru VTF.

The current gearing is fine for my preferences. I like 60-65 mph cruising on the back roads. My brother and some friends like to run much faster and Ok turnpikes are 75 mph. Are you saying running around at 4 grand is ok for the motor? I sure hate running it that hard. It doesn't seem near as happy at 4k as at 3k (4k is nowhere near the sweet spot). I'd like to be able to let it run comfortably at both speed ranges.

joe

ClassicRider · 08-10-2008, 03:37 AM

The current gearing is fine for my preferences. I like 60-65 mph cruising on the back roads. My brother and some friends like to run much faster and Ok turnpikes are 75 mph. Are you saying running around at 4 grand is ok for the motor? I sure hate running it that hard. It doesn't seem near as happy at 4k as at 3k (4k is nowhere near the sweet spot). I'd like to be able to let it run comfortably at both speed ranges.

UPDATE AFTER TYPING AND THEN REVIEWING PREVIOUS ABOVE POSTS

Alright I typed this whole thing up clicked send and then actually realized that I got "Homesick" confused with "sdlowrider" so my appologies....Homesick, I don't even know what bike you are riding....whether you even do have 3.37 final gearing....you state, after rereading your final post that you are running something along the lines of an FXRT, but you haven't shared what your bike's gearing is for the year and model of your FXR, so take my comments as tongue and cheek...since this may not even be close to representing anything to what you are running, but for "sdlowrider"....these reflections will precisely relate to his 1993 FXR....but the funny thing is he isn't asking the questions that I have taken the time to address....but I figure someone if neither of you two guys get much benefit from this discussion perhaps someone else will....lol SORRY!!!!

Actually I think you would benefit from reading the thread above....you may be finding some confusion in what I am saying......
Again at this point I am thinking I am talking to "sdlowrider" oops sorry....

With 3.37 gearing....you are running a "lower" gearing....thus at highway speeds you will be running your engine at higher RPM's for example in 5th gear:

your 3.37 gearing @ 70 MPH will be running RPM's at 3176 aprx depending on your tire size
my 2.925 gearing @ 70 MPH will be running RPM's at 2750 which is a 426 RPM difference

Again, for example in 5th gear:

your 3.37 gearing @ 75 MPH will be running RPM's @ 3403 aprx depending upon tire size
my 2.925 gearing @ 75 MPH will be running RPM's @ 2950 which is 453 RPM's Lower

Again, for example in 5th gear:

your 3.37 gearing @ 80 MPH will be running RPM's @ 3630 aprx depending upon tire size
my 2.925 gearing @ 80 MPH will be running RPM's @ 3150 which is 480 RPM's Lower

Again, for example in 5th gear:

your 3.37 gearing @ 85 MPH will be running RPM's @ 3900 aprx depending upon tire size
my 2.925 gearing @ 85 MPH will be running RPM's @ 3350 which is 550 RPM's Lower

Are you saying running around at 4 grand is ok for the motor?

Actually what I am saying is that a 6 speed transmission isn't necessary with these light bikes even if you put the bags of an FXRT on your bike.

I am also saying that with the 3.37 gearing that you are running....you are running a lower gearing than I am with my 2.925 gearing.....and that if you want to lower your RPM's as hardluk1 has been trying to explain....that by simply changing out your transmission pulley you can slow down your RPM's if you wish...it's your choice....my only point is that putting a 6th gear in an FXR is wasting your money......for something that isn't necessary....

I will say that running your bike @ 4,000 RPM's on a twin cam engine (switching gears for a moment....lol pun intended) with fuel injection is an OK thing to do....and probably in some ways is well within the "sweet" spot....but on our evo engines I would say that pulling the throttle up there for reving purposes is enough....perhaps around 4500 RPMS for a quicker shift but keeping the bike in the 3,000 - 3,600 RPM range is well within the "sweet spot range" with probably 3100 RPM's being a very nice center for the sweet spot....

The 1999 FXR2 that I own as I just said above runs a 2.925 final gearing ratio....the thread above will go into this fairly well....you won't be able to get to 2.925 gearing without a huge amount of money being spent for many "complicated" reasons...however you can get to 3.08 gearing that is so close that you wouldn't or couldn't possibly feel the difference and the amount of money you will spend will be negligible but perhaps worth it to you...only you can decide....

I also trying to say...that "back in the day" lol ok back to 1982 when these bikes were first offered with the shovel engine....the motorcycle world was changing from a 4 speed to a 5 speed...and effectively with the weight of the FXR the 5th gear DOES serve as sort of an OVERDRIVE gear....for fuel mileage purposes....when running 2.925 gearing....

I like 60-65 mph cruising on the back roads.

.......and there is a reason for this....because with your 3.37 gearing in 5th gear you are experiencing the following:

at 60 MPH your RPM's are at 2725 RPMS
at 65 MPH your RPM's are at 2950 RPMS

while my bike with 2.925 gearing in 5th gear is experiencing:

at 60 MPH my RPM's are at 2360 RPMS
at 65 MPH my RPM's are at 2560 RPMS

now I would never ride my bike at this low of RPM's so I would actually be in 4th gear experiencing the following:

at 60 MPH my RPM's are at 2800 RPMS
at 65 MPH my RPM's are at 3100 RPMS

which is totally acceptable....

you on the other hand would be experiencing in 4th gear the following:

at 60 MPH your RPM's are at 3200 RPMS
at 65 MPH your RPM's are at 3500 RPMS

So my point is the reason you are enjoying your bike at 60-65 RPM's is that you are within the "sweet spot" of that 3.37 gearing....and my point is if you were to raise your gearing to 3.08 gearing you would feel the same way riding at 70 -75 MPH as you do right now with your 3.37 gearing at 60-65 MPH.

When or if you decide to view the above thread at the very end I am asked by the creater of the thread if I would figure out what 3.08 gearing would be doing for his 1993 FXLR so you can see all of the RPM levels if interested....through out 1st - 5th gear....

......and if you are comfortable where you are at that's great....I at one time was considering putting 3.37 gearing into my FXR2 but after analyizing everything....I really feel the benefits of having the higher gearing are a perfect match for this particular bike....it's light enough to be quick....and the 5th gear works as I said as a overdrive.....often times when I am in the mountains with my FXR2 I stay in 4th all the time....riding the bike somewhat aggressively....and yet my gas mileage only suffers by a couple miles per gallon...it reflects in me getting 47 or 48 mpg vs 50 or 51 mpg....

Another thread you might enjoy reading, it's a thread about the "HISTORY OF THE FXR" if you feel it might be interesting to you simply click, view, and read :

http://www.cvoharley.com/smf/index.p...ic=25417.0;all

I happen to be FXR2evo99 at the CVO website/forum

Regards,

"Classic"

Homesick · 08-10-2008, 09:58 PM

Quote:

Originally Posted by ClassicRider

The current gearing is fine for my preferences. I like 60-65 mph cruising on the back roads. My brother and some friends like to run much faster and Ok turnpikes are 75 mph. Are you saying running around at 4 grand is ok for the motor? I sure hate running it that hard. It doesn't seem near as happy at 4k as at 3k (4k is nowhere near the sweet spot). I'd like to be able to let it run comfortably at both speed ranges.

UPDATE AFTER TYPING AND THEN REVIEWING PREVIOUS ABOVE POSTS

Alright I typed this whole thing up clicked send and then actually realized that I got "Homesick" confused with "sdlowrider" so my appologies....Homesick, I don't even know what bike you are riding....whether you even do have 3.37 final gearing....you state, after rereading your final post that you are running something along the lines of an FXRT, but you haven't shared what your bike's gearing is for the year and model of your FXR, so take my comments as tongue and cheek...since this may not even be close to representing anything to what you are running, but for "sdlowrider"....these reflections will precisely relate to his 1993 FXR....but the funny thing is he isn't asking the questions that I have taken the time to address....but I figure someone if neither of you two guys get much benefit from this discussion perhaps someone else will....lol SORRY!!!!

Actually I think you would benefit from reading the thread above....you may be finding some confusion in what I am saying......
Again at this point I am thinking I am talking to "sdlowrider" oops sorry....

With 3.37 gearing....you are running a "lower" gearing....thus at highway speeds you will be running your engine at higher RPM's for example in 5th gear:

your 3.37 gearing @ 70 MPH will be running RPM's at 3176 aprx depending on your tire size
my 2.925 gearing @ 70 MPH will be running RPM's at 2750 which is a 426 RPM difference

Again, for example in 5th gear:

your 3.37 gearing @ 75 MPH will be running RPM's @ 3403 aprx depending upon tire size
my 2.925 gearing @ 75 MPH will be running RPM's @ 2950 which is 453 RPM's Lower

Again, for example in 5th gear:

your 3.37 gearing @ 80 MPH will be running RPM's @ 3630 aprx depending upon tire size
my 2.925 gearing @ 80 MPH will be running RPM's @ 3150 which is 480 RPM's Lower

Again, for example in 5th gear:

your 3.37 gearing @ 85 MPH will be running RPM's @ 3900 aprx depending upon tire size
my 2.925 gearing @ 85 MPH will be running RPM's @ 3350 which is 550 RPM's Lower

Are you saying running around at 4 grand is ok for the motor?

Actually what I am saying is that a 6 speed transmission isn't necessary with these light bikes even if you put the bags of an FXRT on your bike.

I am also saying that with the 3.37 gearing that you are running....you are running a lower gearing than I am with my 2.925 gearing.....and that if you want to lower your RPM's as hardluk1 has been trying to explain....that by simply changing out your transmission pulley you can slow down your RPM's if you wish...it's your choice....my only point is that putting a 6th gear in an FXR is wasting your money......for something that isn't necessary....

I will say that running your bike @ 4,000 RPM's on a twin cam engine (switching gears for a moment....lol pun intended) with fuel injection is an OK thing to do....and probably in some ways is well within the "sweet" spot....but on our evo engines I would say that pulling the throttle up there for reving purposes is enough....perhaps around 4500 RPMS for a quicker shift but keeping the bike in the 3,000 - 3,600 RPM range is well within the "sweet spot range" with probably 3100 RPM's being a very nice center for the sweet spot....

The 1999 FXR2 that I own as I just said above runs a 2.925 final gearing ratio....the thread above will go into this fairly well....you won't be able to get to 2.925 gearing without a huge amount of money being spent for many "complicated" reasons...however you can get to 3.08 gearing that is so close that you wouldn't or couldn't possibly feel the difference and the amount of money you will spend will be negligible but perhaps worth it to you...only you can decide....

I also trying to say...that "back in the day" lol ok back to 1982 when these bikes were first offered with the shovel engine....the motorcycle world was changing from a 4 speed to a 5 speed...and effectively with the weight of the FXR the 5th gear DOES serve as sort of an OVERDRIVE gear....for fuel mileage purposes....when running 2.925 gearing....

I like 60-65 mph cruising on the back roads.

.......and there is a reason for this....because with your 3.37 gearing in 5th gear you are experiencing the following:

at 60 MPH your RPM's are at 2725 RPMS
at 65 MPH your RPM's are at 2950 RPMS

while my bike with 2.925 gearing in 5th gear is experiencing:

at 60 MPH my RPM's are at 2360 RPMS
at 65 MPH my RPM's are at 2560 RPMS

now I would never ride my bike at this low of RPM's so I would actually be in 4th gear experiencing the following:

at 60 MPH my RPM's are at 2800 RPMS
at 65 MPH my RPM's are at 3100 RPMS

which is totally acceptable....

you on the other hand would be experiencing in 4th gear the following:

at 60 MPH your RPM's are at 3200 RPMS
at 65 MPH your RPM's are at 3500 RPMS

So my point is the reason you are enjoying your bike at 60-65 RPM's is that you are within the "sweet spot" of that 3.37 gearing....and my point is if you were to raise your gearing to 3.08 gearing you would feel the same way riding at 70 -75 MPH as you do right now with your 3.37 gearing at 60-65 MPH.

When or if you decide to view the above thread at the very end I am asked by the creater of the thread if I would figure out what 3.08 gearing would be doing for his 1993 FXLR so you can see all of the RPM levels if interested....through out 1st - 5th gear....

......and if you are comfortable where you are at that's great....I at one time was considering putting 3.37 gearing into my FXR2 but after analyizing everything....I really feel the benefits of having the higher gearing are a perfect match for this particular bike....it's light enough to be quick....and the 5th gear works as I said as a overdrive.....often times when I am in the mountains with my FXR2 I stay in 4th all the time....riding the bike somewhat aggressively....and yet my gas mileage only suffers by a couple miles per gallon...it reflects in me getting 47 or 48 mpg vs 50 or 51 mpg....

Another thread you might enjoy reading, it's a thread about the "HISTORY OF THE FXR" if you feel it might be interesting to you simply click, view, and read :

http://www.cvoharley.com/smf/index.p...ic=25417.0;all

I happen to be FXR2evo99 at the CVO website/forum

Regards,

"Classic"

LOL, I understand about post confusion. I've done it a time or two.

Mine is a '93 Convertible with Metzler 880s. The full set of '84 FXRT gear (fairing, bags, and trunk) has been transplanted to it. I figure about 650 lb plus my 260.

My bike turns 3200-3300 rpm at 60 mph in 5th gear. I like slow cruising (60-65) just because it's relaxing. Still would like to also be able to run turnpike speeds without feeling like I'm beating it.

Does any of this alter any of your previous cipherin'?

Thanks,
joe

ClassicRider · 08-10-2008, 11:32 PM

Homesick~~~
Mine is a '93 Convertible with Metzler 880s. The full set of '84 FXRT gear (fairing, bags, and trunk) has been transplanted to it. I figure about 650 lb plus my 260.

My bike turns 3200-3300 rpm at 60 mph in 5th gear. I like slow cruising (60-65) just because it's relaxing. Still would like to also be able to run turnpike speeds without feeling like I'm beating it.

Does any of this alter any of your previous cipherin'?

Hey I am with you on "slow" cruising....I TOO love to go 55-65 MPH....that's why the "county" and "state" roads work for me just fine......and I TOTALLY agree with you that it's more relaxing.....anyway...

Ahhhhh so a 1993 FXRS-CONV Low Rider Convertible awesome....and you have found the "bags" from a FXRT....

So I have a question, if I am understanding you correctly, what are you doing with your "OEM" "CONVERTIBLE" Saddlebags since you are running the FXRT Fiberglass bags?

It's not uncommon for TACS to be off a bit....upwards of 150-200 rpms.....I would say what I provided above about your RPM's is fairly accurate as well as providing the tables below....

Iif you have the factory gearing of:

24 Tooth Compensating Sprocket, 37 Tooth clutch Shell basket, 32 Tooth Transmission Pulley and 70 Tooth Rear Wheel Sprocket then of course you are running 3.37 final gearing, which is how that bike came from the factory OEM.

So what happens if you change the Transmission Pulley to a 33 Tooth and the Rear Wheel Sprocket to a 65 tooth:

Ok....so I ran the following:

24T Comp Sprocket
37T Clutch Shell Basket
33T Transmission Pulley
65T Rear Wheel Sprocket
25.43" Diameter Tire 130 me 880

The final gearing with this combination it is 3.03 simply by changing the Transmission Pulley to a 33 Tooth and the Rear Wheel Sprocket to a 65 Tooth.

2.925 final gearing = 1999 FXR2, 1999 FXR3, 2000 FXR4
3.37 final gearing = many different FXR's through the years but specifically for all of the 1993 FXR Models such as yours
3.037 final gearing = changing the stock/oem final gearing by changing the Transmission Pulley from 32 Tooth OEM to 33 Tooth and changing the Rear Wheel Sprocket 70 Tooth OEM to a 65 Tooth Rear Wheel Sprocket. The addition of changing one's secondary belt drive from 139 Tooth and reducing it to a 133 Tooth belt may be required, the actual teeth of 133 I am not 100% sure of as of this writing.

The format of V~Twin Forums will not allow me to send this into here as a "table" so the columns are a bit messed up but with a good eye you can keep everything straight hopefully....lol

MPH 1st gear
2.925 3.15 3.37 3.037

RPM RPM RPM RPM
15 1700 2000 2100 1950
20 2500 2700 2900 2600
25 3100 3300 3500 3250
30 3700 4000 4250 3900
35 4300 4600 4950 4500
40 5000 5300 ------ 5150
45 ----- ----- ------

MPH 2nd gear
2.925 3.15 3.37 3.037

RPM RPM RPM RPM
15 ----- ----- ----- -----
20 ----- ----- ----- -----
25 ------ 2300 2450 2225
30 2600 2750 2900 2650
35 3000 3200 3400 3100
40 3400 3700 3900 3550
45 3850 4100 4400 4000
50 4300 4550 4900 4450
55 4700 5000 5400 4900
60 5100 5500 ------ 5300

MPH 3rd gear
2.925 3.15 3.37 3.037

RPM RPM RPM RPM
35 2100 2300 2450 2200
40 2400 2600 2800 2500
45 2700 2900 3100 2850
50 3000 3200 3450 3150
55 3350 3600 3800 3475
60 3650 3900 4150 3800
65 4000 4200 4500 4100
70 4250 4550 4850 4400
75 4550 4850 5200 4750
80 4900 5200 5550 5050
85 5100 5500 ------ 5350

MPH 4th gear
2.925 3.15 3.37 3.037

RPM RPM RPM RPM
50 2400 2550 2700 2500
55 2600 2800 3000 2700
60 2850 3050 3250 2950
65 3100 3300 3500 3200
70 3350 3550 3800 3450
75 3600 3800 4100 3700
80 3800 4050 4350 3950
85 4000 4300 4600 4200
90 4300 4600 4900 4450
95 4500 4850 5150 4700
100 4750 5100 5400 4950
105 5000 5300 ------ 5200
110 5225 5600 ------ 5400
115 5500 5825 ------ 5700

MPH 5th gear
2.92 3.15 3.37 3.037

RPM RPM RPM RPM
45 ----- ----- ----- ----
50 ------ 2050 2200 2000
55 ------ 2300 2450 2200
60 2300 2500 2650 2400
65 2500 2700 2900 2600
70 2700 2900 3100 2800
75 2900 3100 3300 3000
80 3100 3300 3550 3200
85 3300 3500 3750 3400
90 3500 3700 4000 3600
95 3700 3900 4200 3800
100 3900 4100 4400 4000
105 4100 4300 4650 4200
110 4250 4550 4850 4400
115 4450 4750 5100 4600
120 4650 4950 5300 4800

Homesick....

Perhaps you are absolutely fine with your 3.37 gearing....and if you are...that's great....I have been wanting to talk with someone like yourself who is riding an FXR with 3.37 final gearing....of course like you said you are running a bit more weight now that you are running the fiberglass rear bag, along with the 2 saddlebags, and the FXRT front fairing as well.....and so the 3.37 gearing may be pulling about right for you.....but if you are feeling a bit more "buzziness" at 70-80 mph now you will can put a reason to what you "may be" feeling.....Sdlowrider, since he began this thread would definitely benefit from doing what is listed above if it is bothering him that much....

It should be noted that if one were to decide to modify their Tranmission Pulley from 32 Tooth up to a 33 Tooth, and also to keep within the confines of the above final gearing of 3.037 one would also be changing their Rear Wheel Sprocket from a 70 Tooth down to a 65 Tooth. BUT there may be one more required change as well....and that is the Drive Belt...I should know within a couple of weeks what the requirement will be for this, but it may require going from a 139 Tooth belt to a 133 Tooth belt as the primary author of the Thread that I linked everyone to up above is in the process of doing the "R&D" of this right now....and has access to a couple of different 'length" drive belts and will post as soon as he let's me know what it requires with the 33 Tooth and 65 Tooth combo.

So there you have it.......hopefully this is helpful to you or to anyone who may happen along....

I would certainly enjoy having further discussions with you as well as others who are running the 3.37 final gearing on their FXR's to see what there impressions are.....most may not even know they are running 3.37 gearing as they may not be paying that much attention to it or don't really even care for that matter.....

All I can say is that I changed my 3.15 gearing on my 2002 RKC to 3.37 gearing and it really woke the bike up....but that bike is around 720 lbs. I like it alot....I did a big how to install this which is over in the Technical Discussions For Twin Cams....I finished my project in early summer....well worth it for me....very nice indeed....

All of that effort began my mind to thinking about changing my gearing also on my 1999 FXR2, but after careful analysis due to the "lightness" of the bike and given that back in the day when the FXR's were being designed....basically the 5th gear is an overdrive on these bikes....and as I have said above, heck I stay in 4th gear alot while in the mountains and even on the highways, and to use 5th gear for me really requires getting up to the 75-80 mph. I have already addressed what mph I basically get and I suffer little from this type of riding....and have already mentioned where the sweet spot on my FXR2 is as well....bottom line Harley Davidson really hit the overall "SWEET SPOT" for this transmissio