REPRINT FROM OLD HTT: 3.37 FINAL GEARING, OH YEAH!!!!!

[ClassicRider2002]

DISCLAIMER: THIS IS A REPRINT TOPIC FROM "OLD" HTT

I have saved many great topical discussions as "links" over the years and would hate to see these lost, so I am reprinting this TOPIC here, which may "perhaps" help some.

TOPIC:  3.37 FINAL GEARING, OH YEAH!!!!  05-21-2007


From: Arrowsmit  (Original Message) Sent: 5/21/2007 8:09 PM   Message 1 of 15 in Discussion
You guys were right! AWESOME!!
VicW.

[ClassicRider2002]

From: Mike52  Sent: 5/21/2007 8:54 PM   Message 2 of 15 in Discussion
Vic, what took you so long? ? ? ?........................I really like the 3.37 gearing also.   Mike


From: ROADKINGO5CUSTOM Sent: 5/21/2007 9:16 PM  Message 3 of 15 in Discussion
Extra nice with six speed 
   

From: PTroc Sent: 5/21/2007 10:20 PM   Message 4 of 15 in Discussion
I'll never look back.  P


From: SmokeyJoe66 Sent: 5/21/2007 10:22 PM   Message 5 of 15 in Discussion
Arrowsmit,
Where did you get you parts?
Looks like Zanotti's has really jumped the price up on the compensating sprocket.  Joe J.


From: fxd2000 Sent: 5/22/2007 1:30 PM   Message 6 of 15 in Discussion
What is a 3.37 gearing that I always read about. And would this help the acceleration on a stock 2005 road king?
 

From: hogbagger6 Sent: 5/22/2007 2:55 PM   Message 7 of 15 in Discussion
ARROWSMIT, dollar for dollar, the change from 3.15 final gear ratio to 3.37 final gear ratio, brought the biggest smile from first ride and continues to do so. Keep your stock parts, then when you sell it, if the guy only rides long distance, he can switch back.
Ain't Low End TORQUE  FUN? ? ? ? ?       Jim
    

From: Faast Ed  Sent: 5/22/2007 2:57 PM   Message 8 of 15 in Discussion
Wish I had a 6 speed, I would do the 3.37.  I spend too much time in the mid to upper 5th range and already feel like I wanna shift again sometimes. But I had the 3.37 in an older bike and would love to add that low end 'kick' again.   Congrats, Bro!


From: 09nutz Sent: 5/22/2007 3:07 PM   Message 9 of 15 in Discussion
Wish I had a 6 speed, I would do the 3.37.

I spend too much time in the mid to upper 5th range and already feel like I wanna shift again sometimes. But I had the 3.37 in an older bike and would love to add that low end 'kick' again.  Heck...it ain't no big loss with 5 speed, I only lost 1-2 miles per gallon and it's most likely due to gunning it more.


From: Arrowsmit Sent: 5/22/2007 3:45 PM   Message 10 of 15 in Discussion
I got the parts from Zannoti HD & yep the price of the comp sprocket has gone up. Still the best bang for the buck performance upgrade around IMO. Ed, I'm going 6 speed someday, just gotta get some coin together for that'n...   VicW.


From: HDharpo Sent: 5/22/2007 5:33 PM   Message 11 of 15 in Discussion
I'm new to the twinkie world - but my stock '99 RK has 3.37 overall drive ratio - do the newer ones have a different stock ratio?  3.15 like hogbagger said?


From: PTroc Sent: 5/22/2007 5:37 PM   Message 12 of 15 in Discussion
I bought a brand new comp sprcket on ebay for $35.  They are on there.  P


From: Ultrashovel1 Sent: 5/22/2007 5:47 PM   Message 13 of 15 in Discussion
All 2002-2006 88's Touring Bikes all have 3.15:1 final gearing.  Formerly, (1999-2001) MM EFI Touring Bikes had 3.37:1 while the (1999-2001 Carb Bikes had 315:1 final gearing.  The 2007's with six speed are way high at about 2.79:1 or thereabouts. They use all six speeds to get up to the direct drive 2.79:1. Too much shifting for me.

I changed to 3.37:1 on my 2004 with the 24 tooth motor sprocket and the 37 tooth clutch shell from Zanotti's. I have a sidecar so it's really perfect.

I had 3.37:1 on my 1993 Evo and it was really great. I think they have gone overboard with the high gearing. More lugging and pinging equals more heat. Probably the best way to change the 2007's to a lower gear is to get a 30 tooth motor sprocket. You will need a matching chain. There is a company on the internet now selling these but I can't remember the exact name.......(Revolution Industries or some such? )   You could also change the rear pulleys and belt but this would affect the speedometer readings and it's also a lot more expensive.   Happy Trails. 


From: Arrowsmit Sent: 5/22/2007 6:11 PM   Message 14 of 15 in Discussion
Didn't they go to 3.15 on touring models after 2001? My '02 UG had 3.15:1...  VicW.


From: Mike52  Sent: 5/22/2007 7:40 PM  Message 15 of 15 in Discussion
The 2004's and later 88's had 3.15:1. Formerly, they had 3.37:1 

Harpo,  It's much easier to explain this way, the only recent bikes to come from the MoCo with the 3.37 gearing were the '99-'00-'01 Touring bikes with EFI. The carb bikes were geared different. Hope this helps.

Mike

 
HERE ARE TWO OTHER THREADS THAT I HAVE TAKEN SOME POSTS FROM AND ARE APPROPRIATE TO SIMPLY BE ADDED HERE

1ST ONE:

From: Road-King03  (Original Message) Sent: 7/8/2007 9:38 AM   Message 1 of 10 in Discussion 
If you're on the fence about this mod just DO IT! I went to the 3:37's from stock when I did my 98" build on my 05 Eglide and was quite happy with them, however when I tore the motor down for a new crank and Timken conversion I thought WTH and put the stock gears back in. After running them for 500 miles or so I was thinking it would be nice to compare apples to apples as I never ran the stock 3:15's with the 98" motor. I found I was constantly hunting for the right gear. I was keeping a real close eye on my tach and always thinking with a couple hundred more RPM I wouldn't be making this down shift.

The other night I put the 3:37's back in and OH YEAH! Not only does it accelerate better but I'm not always hunting for the right gear as it seems like I'm always where I need to be and the motor seems happier. I took it out on the interstate (which I avoid when possible) and this thing was happy as could be running 80-85 MPH. Down the road I may consider a 6 speed but I don't want to lose the 1-5 gears with the 3:37's.


From: Torque  Sent: 7/8/2007 9:52 AM  Message 2 of 10 in Discussion
With a Baker DD6 your gears 1-5 will remain very close to the same.  Sixth gear will be 2.89.


From: 04fatty Sent: 7/8/2007 9:53 AM   Message 3 of 10 in Discussion
RoadKing, I did a 95 build a little while ago and am looking for another mod now(haha). Could you tell me what to buy, where to get it, and what the cost was? Thanks


From: Road-King03 Sent: 7/8/2007 10:25 AM   Message 4 of 10 in Discussion 
These are the parts and prices if bought through Zanotti's. I don't think you'll be disappointed.

37846-99A  (Quantity 1 * Price251.07)   $ 251.07
40269-85A  (Quantity 1 * Price102)        $ 102.00
Shipping is                                                $ 21.50 
                             Total                         $ 374.57 


From: quikhog Sent: 7/8/2007 11:11 AM   Message 5 of 10 in Discussion
Looks like this is a simple bolt in project,Will this setup work on a2002 softail? and what else if anything is needed? Been wanting to change from 3:15 for sometime but didnot wanrt to use the Baker conversion at the compensator nor did I really want to go down to a 30 tooth driver, this seems alot simpler to me.


From: OhioFLHTCUI Sent: 7/8/2007 8:02 PM   Message 6 of 10 in Discussion
Road-King03, what RPM are you doing when you're at the 80-85 mph range?
   

From: Road-King03 Sent: 7/16/2007 7:40 AM    Message 7 of 10 in Discussion
OhioFLHTCUI~~~Well Road-King03, did you take an RPM reading at 80 yet?   I was curious as to what you came out at.
Sorry it took so long. I just returned from a nice long 4 day ride. It looks like I'm turning 3450 rpm at 80 mph.  Rick


From: Hellfire06 Sent: 7/16/2007 8:56 PM    Message 8 of 10 in Discussion
Not to tramp on the thread, but when did the setup change on EFIs? TIA,  PB


From: Mike52  Sent: 7/16/2007 9:05 PM    Message 9 of 10 in Discussion
when did the setup change on EFIs?

The 3.37 primary gearing was used on the EFI equipped Touring models only in '99-'00-'01 only.   
I've got the 3.37 in my '01 Springer and '06 Street Glide, I think it's one of the best bang for the buck that's out there.

Mike  


From: HDDOC1949 Sent: 7/17/2007 5:16 AM   Message 10 of 10 in Discussion
Now if they only had it for the 07s. I would be the first to get it done. Love the 3.37.  Doc


2ND ONE:

From: f-x-d-w-g  (Original Message) Sent: 7/18/2007 1:09 PM   Message 1 of 4 in Discussion
I'll be pulling down the primary in a month or so to fix a leaking tranny seal and wondered if it's a reasonable mod for me.  My bike already accelerates like gang busters and first and second gears already go by pretty quickly.  I rarely ride over 90 mph for extended periods so the higher RPM shouldn't be too much of a problem but when I take a trip it's usually a long one, > 5,000 miles.  Just trying to convince myself that I should or should not do the mod.  Dan


From: Mike52  Sent: 7/18/2007 1:47 PM   Message 2 of 4 in Discussion
Dan, I've done it to both my bikes, the '01 Springer and the '06 Street Glide, I love the gearing, a very good bang for the buck in my opinion. On the Springer with the built 95", I think it brings the RPM up just enough at cruising speed to be in the "sweet spot", the engine seems to run easier, smoother. At highway speeds (70-80mph) the RPMs are only about 250 more with the 3.37.

Mike


From: blk-betty Sent: 7/18/2007 7:10 PM   Message 3 of 4 in Discussion
Had a hoped up 95" FXST with 3.37 and loved it.  Until I started doing more highway distance riding.  I sold that bike and now have a FLHX with the stock 3.15.  For me, I would not go back to the 3.37 becasue I now do a lot more distance touring.  78 mph on the 88" FLHX is 3000 rpm.  Like Mike said, the 3.37 bumps you up about 250 but my bike feels right and sounds right at 3000.

Also the FXST was rigid mounted so with increasing rpms it got more buzzy even with the internal blancers and that got old after a couple hunderd miles.  Maybe on a rubber mount (bagger or dyna) that wouldn't be an issue but something to think about if on a softail - course from your nickname I presume you ride a dyna. 


From: f-x-d-w-g Sent: 7/19/2007 6:10 AM   Message 4 of 4 in Discussion
All good arguments.   Yes, it's a Dyna and it's a great touring bike and a hoot on the back roads.

[ClassicRider2002]

Anything added beyond this point is new information.

Regards,

"Classic"

[ClassicRider2002]

I actually have a excel spread sheet that was provided within a THREAD here at HTT by:
From: Fuzznut5197 Sent: 6/13/2008 7:01 PM
Anyone have any use for this driveline spreadsheet? It was posted here back in 2003, and I thought is was saved somewhere in HTT, but I can't find where.

Hopefully all will be able to down load the EXCEL PROGRAM below next to the "paper clip"

If you plug in your actual gearing (comp sprocket "T"ooth size, clutch shell basket/ring gear "T"ooth size, rear wheel sprocket "T"ooth size, transmission "T"ooth size as well as rear wheel diameter then it will factor RPMS and such which would aid you in determining what level of gearing you might benefit most from........then if you wish to ponder some other options for your comp gear or your clutch shell basket gear or perhaps your secondary gearing which might require a different belt you can see what might create the biggest bang for your buck.....

[NOTE: Please remember that putting your cursor next to the paper clip icon below will allow you to open this EXCEL PROGRAM, if you desire simply choose to save the program to your computer as well]

[attachment removed after 60 days by system]

[ClassicRider2002]

Hello Everyone~~~

Through out all of the "old" THREADS that deal with the 3.37 Gearing Modifcation to our TWIN CAM BIKES I really enjoyed reading them....and after all of the valuable input from everyone whom posted, I eventually did the MODIFCATION to my 2002 RKC.  Like many before me have stated and I must concur, this MODIFICATION has to be ONE OF THE ABSOLUTELY BEST MODIFICATIONS I have done to my "BAGGER", it's such a wonderful "bang" for the buck invested....

Thus I put together a detailed THREAD about the modification, if you are interested in reading about such Simply CLICK, VIEW, & READ the Attached "LINK" below:

3.37 MODIFICATION GEARING INSTRUCTIONS FOR 2002-2006 TWIN CAMS 

I happen to be "ClassicRider" @ V~TWIN FORUM.

The above THREAD which I have provided a "link" for above will address ways of seperating the Clutch Shell Basket/Ring Gear from the Clutch Hub as well as considerations for whether or not changing the Double Angular Bearing is necessary. 

Hopefully it is helpful to some you!

Regards,

"Classic"