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[OILCAN1]

Has anyone tried gearing changes on their 110 powered 6 speed. The 110's deliver some phenominal torgue so they pull well I was just curios about being able to actually use six gear below 75. I don't mind riding 85 everywhere but sooner or later Johnny Law is gona throw the book at me.

[SBB]

Has anyone tried gearing changes on their 110 powered 6 speed. The 110's deliver some phenominal torgue so they pull well I was just curios about being able to actually use six gear below 75. I don't mind riding 85 everywhere but sooner or later Johnny Law is gona throw the book at me.

OC

I may be out here in left field but my 09 pulls well in 6th at a whole lot lower MPH.
I think the 09's are geared lower (higher numerically) than the 07 and 08's.
Maybe a change to the 09 gearing will help.
If that's financially possibly!
Just a thought.

 

[OILCAN1]

I'm not exacatly sure what the 09 gearing is hell i'm not exactly sure what my 07 gearing is, but I do seem to remember reading some were that they did lower the gearing on the 09's. Do you know how many RPM's you are running at 70 mph?

[SBB]

I'm not exacatly sure what the 09 gearing is hell i'm not exactly sure what my 07 gearing is, but I do seem to remember reading some were that they did lower the gearing on the 09's. Do you know how many RPM's you are running at 70 mph?

OC

Sorry bud I don't.
And it's raining here so I will check Sunday!

 

[opee6969]

Mine pulls in sixth gear well from 55mph and up. I'm not sure what the RPM's are at 70mph, but here's a shot of 80mph. The rear sprocket increased from 66 tooth to 68 tooth making sixth gear a lot more functional.

[OILCAN1]

I think Evolution industries makes a primary sprocket that changes the gear ratio so you don't have to take everything apart to get to the front drive sproket, but I will have to check into the rear drive spocket this might be the way to go.

[JDOFLHRIDER]

I think when you change the drive pulley you might have to do something with the speedo ,motorman said I could change drive pulley by a couple teeth with out putting a new drive belt on. I havn't checked to see whats needed to adjust the speedo yet. RIDE SAFE JDO

[OILCAN1]

Is it one tooth on the drive equals three on the driven? I know its something like that but not exactly sure.

[Keats]

This is what I understand to be true, but unconfirmed.

final drive ratio changed in 2008 from 3.19 to 2.79  2006, 2007 to 2008

rear sprocket from a 70 tooth to a 66 tooth IDS drive sprocket giving a taller final drive (lowered rpms at highway speeds)

do not know if a 32 tooth front sprocket standard on both years but, 2008 has a 32 tooth front sprocket.

2009 has a 68 tooth rear sprocket with a IDS drive.   IDS drive not avail in a 70 tooth configuration

changing the 2008  32 front and 66 tooth rear sprockets to a 30 tooth front and 70 tooth rear sprockets gets the final drive ratio to a 3.19 which is the same as 2006 and 2007 Ultra's which

gives it more acceleration and less top end.

I have not confirmed these numbers, so if anyone can confirm it would help.

  

[grc]

04-06   Engine 25  Clutch 36  Trans Output 32  Rear Wheel 70     Final Drive Ratio  3.15:1
----------------------------------------------------------------------------------------
07-08   Engine 34  Clutch 46  Trans Output 32  Rear Wheel 66     Final Drive Ratio  2.78:1
07-08                                                   31                                                 2.87:1
07-08                                                   30                                                 2.97:1
----------------------------------------------------------------------------------------
09        Engine 34  Clutch 46  Trans Output 32  Rear Wheel 68     Final Drive Ratio  2.86:1
09                                                        31                                                  2.96:1
09                                                        30                                                  3.06:1
----------------------------------------------------------------------------------------

My mind went blank on the pre '04 engine sprocket size, I can't remember when it went from 24 to 25 (3.37 to 3.15).

The 30 and 31 tooth trans output sprockets are available from Baker and I believe Andrews as well.  The problem is that any changes made at that point will require speedometer recalibration.  I still haven't seen an alternative engine sprocket other than a solid (non-compensator) version, which would be the easiest and best way to change ratios if it were available.  Changing the rear wheel sprocket is problematic, since the larger size from earlier models is wider and is not IDS compatible.  At this point the trans sprocket is probably the best option.

Jerry

[SBB]

04-06   Engine 25  Clutch 36  Trans Output 32  Rear Wheel 70     Final Drive Ratio  3.15:1
----------------------------------------------------------------------------------------
07-08   Engine 34  Clutch 46  Trans Output 32  Rear Wheel 66     Final Drive Ratio  2.78:1
07-08                                                   31                                                 2.87:1
07-08                                                   30                                                 2.97:1
----------------------------------------------------------------------------------------
09        Engine 34  Clutch 46  Trans Output 32  Rear Wheel 68     Final Drive Ratio  2.86:1
09                                                        31                                                  2.96:1
09                                                        30                                                  3.06:1
----------------------------------------------------------------------------------------

My mind went blank on the pre '04 engine sprocket size, I can't remember when it went from 24 to 25 (3.37 to 3.15).

The 30 and 31 tooth trans output sprockets are available from Baker and I believe Andrews as well.  The problem is that any changes made at that point will require speedometer recalibration.  I still haven't seen an alternative engine sprocket other than a solid (non-compensator) version, which would be the easiest and best way to change ratios if it were available.  Changing the rear wheel sprocket is problematic, since the larger size from earlier models is wider and is not IDS compatible.  At this point the trans sprocket is probably the best option.

Jerry

When all else fails ask Jerry!
Thanks Jerry!

 

[Keats]

04-06   Engine 25  Clutch 36  Trans Output 32  Rear Wheel 70     Final Drive Ratio  3.15:1
----------------------------------------------------------------------------------------
07-08   Engine 34  Clutch 46  Trans Output 32  Rear Wheel 66     Final Drive Ratio  2.78:1
07-08                                                   31                                                 2.87:1
07-08                                                   30                                                 2.97:1
----------------------------------------------------------------------------------------
09        Engine 34  Clutch 46  Trans Output 32  Rear Wheel 68     Final Drive Ratio  2.86:1
09                                                        31                                                  2.96:1
09                                                        30                                                  3.06:1
----------------------------------------------------------------------------------------

My mind went blank on the pre '04 engine sprocket size, I can't remember when it went from 24 to 25 (3.37 to 3.15).

The 30 and 31 tooth trans output sprockets are available from Baker and I believe Andrews as well.  The problem is that any changes made at that point will require speedometer recalibration.  I still haven't seen an alternative engine sprocket other than a solid (non-compensator) version, which would be the easiest and best way to change ratios if it were available.  Changing the rear wheel sprocket is problematic, since the larger size from earlier models is wider and is not IDS compatible.  At this point the trans sprocket is probably the best option.

Jerry

Since I have the attention of the Master (thanks Jerry for the exact numbers)
I can get a 09 rear sprocket and keep the IDS drive in a 68 tooth config. (would rather have 70 tooth, but not made with IDS)   

 Have any idea what the final drive ratio would be only changing rear?  duh! obviously from a 2.78 to 2.86

Is the original belt big enough to handle a 2 tooth increase?

A 30 tooth front with a 68 tooth rear gets me close to the 3.15 ratio of the 06's

[grc]

Since I have the attention of the Master (thanks Jerry for the exact numbers)
I can get a 09 rear sprocket and keep the IDS drive in a 68 tooth config. (would rather have 70 tooth, but not made with IDS)   

 Have any idea what the final drive ratio would be only changing rear?  duh! obviously from a 2.78 to 2.86

Is the original belt big enough to handle a 2 tooth increase?

A 30 tooth front with a 68 tooth rear gets me close to the 3.15 ratio of the 06's

I've heard people say that the original belt would handle a two tooth increase, but I think that is going to depend on each individual bike due to build tolerances.  If you look at where the axle is lined up currently in the swingarm slot, if it's currently fairly well centered I would say two teeth should be OK.  Of course, if you reduce the output sprocket one or two teeth at the same time as you add two teeth at the year, it should definitely fit.  You need to verify if the '09 sprocket will actually fit the '07-'08 rear wheels, however.  I thought they changed the sprocket and wheel to eliminate the bowl for the IDS in '09, making the damper more of an integral part of the rear wheel?  Haven't seen one torn down yet.

I'm not sure why no one has come out with a different compensator gear, but in my opinion that would be by far the best solution.  How about the clutch gear, I haven't looked into that one, is anyone aware of aftermarket parts for that?

Jerry

[hdbrad03]

I not 100% sure but I think the MOCO built the IDS into the wheel hub on the 09's. Different design than the 08's retro to 07's. Got to keep us guessing.


 
   Brad

[grc]

I not 100% sure but I think the MOCO built the IDS into the wheel hub on the 09's. Different design than the 08's retro to 07's. Got to keep us guessing.


 
   Brad

They like to keep us guessing, and I think they are also purposely making it harder to change gearing because gearing affects emissions.  Emissions regs are in terms of grams per mile, and anything you do to significantly alter the engine revolutions per mile will in fact change the emissions numbers.  Not sure if the aces at H-D actually thought of that or not, but it's either believe that or believe they just like to screw with us.  I tend to lean toward both.

Jerry