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[ultrafxr]

You definitely want to go 30T on that one. Use the Tri Glide, no issues.

SG

I agree with Steve.  I put the 30T on my 2007 cuse2.  The 07s and 08s are geared so verrrrrrry high that the 31T will not be enough imo.  The 30T put me right where I want to be rpm/torque wise when cruising and when at highway speed.  It made a TREMENDOUS positive difference.  I simply don't know how I managed to ride it for five years and 70k+ miles with the stock gearing.  What a great improvement.

[resqdoc]

Wow, just wow. Much Better.

SE Compensator, 30T pulley, SE diaphragm spring. Better than new. Ridability MUCH improved. Zero "clunk" going into first gear. 

[DrSpencer]

I seem to recall reading on other forums that most of the belt breaking issues have been from Folks using non-HD 30T pulleys (Baker, Andrews, etc.).

Has anyone broke a belt when using a HD 30T pulley?

Thanks

[DrSpencer]

I did the 30T pulley mod on my 2007 FXSTC (using a HD pulley & belt). I don't know what my final drive ratio is now, but I like it.

I would like to do the same type mod on my 2011 Street Glide.

What size pulley (30T or 31T) will give the 2011 Street Glide the same final drive ratio as the 30T pulley did for my 2007 FXSTC?

Thanks

[Rooster]

The 07-08's had higher gearing andseemto benefit most from 30t. In 09 the rear belt pulley is two teeth different that I would think 31t would be closer to 07 with 30t. someone else might know better

[moscooter]

 
Hey Doc.....Go to this site.

http://www.shopronniesharleydavidson.com/OEMpartfinder.htm

Then click on the OEM Harley Parts and then click motorcycle.

That should take you to a heading that allows you to pick your year and then model.

From there you can select the parts category you want and then get to the rear sprocket which will identify the number of teeth.  Then you can compare ratios and do the necessary math.

[DrSpencer]

Does HD even make a 31T pulley?

Are they only offered from Andrews & Baker?

Thanks

[moscooter]

 

Not sure about the 31 tooth gear and whether Harley makes one.  I ordered my 30T from a Harley Triglide.  That sprocket is slightly wider than what a Tour model needs, but it serves the purpose for getting a 30T trans sprocket from Harley.

I'm thinking the gearing on your '11 tour model is very likely the same as what mine was on my '09 SE Ultra.  If that is true,  I'm remaining in the camp that says the 31T is insufficient to make enough change to matter.

My objective was to get some lower gearing to get the fat pig moving from a dead stop.   I was after a low gear start up that was similar to my 2001 RK Classic which as I recall had a final of 3.37:1.

I care less about the argument of the rpms at 85-90 MPH cause I'm not running up there very often.  Thus,  to me the 31T is a waste of time considering my end results expectations.

Again,  seeing as you were happy with your older bikes gearing,  you need to do the "math" given whatever gearing it had and then compare it with (likely a heavier bike) and what you want to get out of it.

[DrSpencer]

Not sure about the 31 tooth gear and whether Harley makes one.  I ordered my 30T from a Harley Triglide.  That sprocket is slightly wider than what a Tour model needs, but it serves the purpose for getting a 30T trans sprocket from Harley.

I'm thinking the gearing on your '11 tour model is very likely the same as what mine was on my '09 SE Ultra.  If that is true,  I'm remaining in the camp that says the 31T is insufficient to make enough change to matter.

My objective was to get some lower gearing to get the fat pig moving from a dead stop.   I was after a low gear start up that was similar to my 2001 RK Classic which as I recall had a final of 3.37:1.

I care less about the argument of the rpms at 85-90 MPH cause I'm not running up there very often.  Thus,  to me the 31T is a waste of time considering my end results expectations.

Again,  seeing as you were happy with your older bikes gearing,  you need to do the "math" given whatever gearing it had and then compare it with (likely a heavier bike) and what you want to get out of it.

Agreed.

Although I haven't done the 'math', I think that a 31T will give my 2011 Street Glide the same final gear ratio that the 30T gave my 2007 Softail Custom. Can anyone comment on this?

Also, does HD even make a 139T, 1" wide belt? I think this is what I would need if going to a 31T pulley (isn't is?).

Thanks, once more.

[brassspike]

bump 
So is everyone changing to the 30 or the 31 on the 11-12 bikes?

[Supershooter]

Is there a need to switch for 11's? I had issues with 11st being too tall in my 2010, but haven't had any issues with my 11...
Supershooter

[RayG]

I've put close to 50,000 miles on my 08 with the 30 tooth conversion.  I broke the Falcon belt at 3000 miles, then I found an OEM length that would fit, so far it's holding up fine.  I have a S&S 124 and I'm not exactly easy on it.  I only get on it once it's moving, if I was inclined to do many burn outs I would just go the chain & sprocket route. 

[ltank]

Do the math. Divide the clutch hub teeth by the motor sprocket.
Ex. 36÷25= 1.44
Divide the rear wheel pulley the trans.
Ex  65÷30= 2.166
Multiply 2.166 × 1.44= 3.119 5th
If  you have a Over Drive gearset .86 or .89
Multiply 3.119 × .86= 2.75   6th gear final ratio.
This is the gearing on my Bike

[Rooster]

I did the 30T pulley mod on my 2007 FXSTC (using a HD pulley & belt). I don't know what my final drive ratio is now, but I like it.

I would like to do the same type mod on my 2011 Street Glide.

What size pulley (30T or 31T) will give the 2011 Street Glide the same final drive ratio as the 30T pulley did for my 2007 FXSTC?

Thanks

As I said the 07's and 08's had higher gearing as in the rear belt sprocket is different on the 09's and up. So the 07's and 08's do better with the 30t. So the 09's and newer IMO would be roughly same with 31t, however some have done the 30t on the newer bikes so would be best to talk to one of them to get a fair assessment. Good luck with your decision.

[brassspike]

As I said the 07's and 08's had higher gearing as in the rear belt sprocket is different on the 09's and up. So the 07's and 08's do better with the 30t. So the 09's and newer IMO would be roughly same with 31t, however some have done the 30t on the newer bikes so would be best to talk to one of them to get a fair assessment. Good luck with your decision.

That's what I was questioning too. I know the 07-08's need the 30 tooth. I was wondering if 30 tooth was down too far for the 09 and up? I still need to run some interstate on trips.