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[Rsantucc]

I just had installed over the winter (Best time 15% disocunt of labour and installation) the NEW Screamin Eagle 6 Speed gear set with the hyd cover on my 2005 CHERRY (Best Color) SEEG. I have not had a chance to run it yet as I had to miss Daytona this year. But wanted to get feed back from the site on the following:

1) What are the RPMS when crusin at 60, 65, 70, 75, 80 and 85 MPH with this gear set or tranny
2) Does anyone use this set up with a stock 103 motor with a Freedom Pipe, power comander and screamin eagle air cleaner set up
3) Is the system a true over drive for cruising? I ride every year from Albany NY to Sturgis and am looking for fuel mileage and also performace as a whole (Don't we all)

Any other reccomendations or feed back you all could provide is greatly appreciated.

Regards

Robert

[grc]

I just had installed over the winter (Best time 15% disocunt of labour and installation) the NEW Screamin Eagle 6 Speed gear set with the hyd cover on my 2005 CHERRY (Best Color) SEEG. I have not had a chance to run it yet as I had to miss Daytona this year. But wanted to get feed back from the site on the following:

1) What are the RPMS when crusin at 60, 65, 70, 75, 80 and 85 MPH with this gear set or tranny
2) Does anyone use this set up with a stock 103 motor with a Freedom Pipe, power comander and screamin eagle air cleaner set up
3) Is the system a true over drive for cruising? I ride every year from Albany NY to Sturgis and am looking for fuel mileage and also performace as a whole (Don't we all)

Any other reccomendations or feed back you all could provide is greatly appreciated.

Regards

Robert

Robert,

The H-D six speed has a true overdrive sixth gear (0.89 : 1); the first 5 are the same as a stock gearbox.

[Unbalanced]

I would definately consider the 24 / 37 gearing in the primary to go with your 6 speed.  

stock gearing without the 6 speed is 315
24 counter sprocket and 37 clutch basket will yield a 337 gearing.  roughly a 150 to 200 rpm change.

With the 6 speed it will allow you a bit more take off and not hurt you on the top end with the 6 speed

[Rsantucc]

Robert,

The H-D six speed has a true overdrive sixth gear (0.89 : 1); the first 5 are the same as a stock gearbox.

[Rsantucc]

I would definately consider the 24 / 37 gearing in the primary to go with your 6 speed.

[Twolanerider]

So say yo did the gearing woithout the 6 speed will you still get more on the take off, since the 6 speed ahs the same gear ratio as the stock for the first 5 speeds. Also are you shure it will not hurt performance and also increase mileage and lower RPM. Just asing need to know before I make that investment

RSA,
You might be confusing the two things a bit.  Stock gearing is 3.15:1.  That is with or without the six speed.  In other words 3.15 turns forward for every 1 full turn of the rear wheel.  The suggestion was to go to 3.37:1.  In other words 3.37 revolutions out the tranny for every one full turn of the rear wheel.

The 3:37 ratio will raise the RPM compared to the 3:15 ratio.  That is what will account for a bit better feeling of "snap" as you take off.  Our engines are a bit "luggy" at the low end.  So raising the RPMs a bit will make it feel crisper as this will get the engine in to its stronger torque band sooner.  So your feeling of "performance" is increased.  But more revolutions on the engine is more gas used; period.  So changing the gearing makes it feel snappier; but does not help fuel economy.

That's where the six speed would come in.  With the six speed you would again lower the RPMs the engine is turning.  Only in 6th gear of course.  But that is where you'd cruise when you're knocking down miles on the road.

That combination of factors is why some advocate the combination of the gearing change with the six speed.  Snappier feeling lower end while still have some marginal better cruising economy.  If our engines could be made to move their torque curve in sooner we might have something close to having our cake and eating too.  A better feeling of snap at the low end without having to change gears and a lower crusing RPM for economy and less fatigue on the long days.  Maybe that's a combination the new cams some of us are waiting on will allow to happen. [smiley=nixweiss.gif] [smiley=drink.gif]

[Rsantucc]

RSA,
You might be confusing the two things a bit.

[grc]

Jerry,

I did the follwoing math and wanted to run it by you:

1) 80 mph divided by 0.02732 = 2929 RPM, in 6th gear is that right.
2) 80 mph divided by 0.02428 = 3295 RPM in 5th Gear is that right

If this si the case then the RPM will lower by 367 RPM Correct.

Then I would be riding at 3000 RPM to get 80 MPH in 6 gear. If thats the case I am very happy, but I need to have this confirmed before I drink a beer.

Robert,

Your numbers are correct.

[Twolanerider]

is how do you attach a dcoument

RSA, the process is the same as it has been.  Below the box you type your text in will be a button titled "Browse."  Click on that button and from there you will locate the JPG and click on it.  You can't add an attachment to a PM (private message) on the site; only the public posts.

Be sure and do not select "Preview" before selecting "Post."  Attempting to preview your new post with an attachment will strip the attachment from the post (for reasons none of us are quite sure of).  Only other thing to be careful of is to make sure the original file size you are wishing to attach is smaller than 1 meg.  The site is feeling a bit bloated right now so we're keeping her on a diet.

[Rsantucc]

Where do you all reccoemnd I get the 24/37 Primary item? Does harley have them or do I need to move to Rivera or other aftermarket. If I am going to chnage this I want to amke sur I get the best.

Your help is appreciated and Thank you to everyone who has replied

[Twolanerider]

Where do you all reccoemnd I get the 24/37 Primary item? Does harley have them or do I need to move to Rivera or other aftermarket. If I am going to chnage this I want to amke sur I get the best.

Your help is appreciated and Thank you to everyone who has replied

It's Harley supplied gears you're talking about.  Do a search and the part numbers have been posted in another thread here somewhere.

So you just go the six speed installed and are now going to rip the primary right back off to make the gear change?  If it was being considered for any of the reasons discussed when it was all apart for the tranny swap would have been the ideal time to change it.  It really is a somewhat minimal difference to be gained to justify tearing it all back apart a second time though.  Why not wait til a 10,000/20,000/??,000 mile service when the primary might already be off to adjust the chain anyway?  

[GC_Super]

I'll have to say that I'm very happy with my 6sp/3.37 set up. Close to 3 large is a lot to spend for more "percieved" power. I could have spent that money on real performance mods and not needed the gearing or tranny changes. But, this way I can keep my warranty intact, and still have a low comp, quiet, easy starting, good fuel mileage motor.  With HD, it's hard to have your cake and eat it too.  

[Rsantucc]

Your right I should enjoy the 6 speed and when doing my 15 or 20K consider the 24/37 thanks

[PCC]

The only real issue you have is that your 1st gear is 2.94, which with a 103 producing around 100 TQ and 100 HP, runs out of room pretty quick. Now you go to the 24/37 setup and your overall drive is lower still which means even quicker shifts from 1st to 2nd. On the other end however, on the road in 6th, IMHO, the rpm reduction of the HD 6 speed is too much in the 70-75 mph range. Believe it or not that motor still doesn't have the poop to run 2650-2800 rpm and pull an 800 bike with passengers and gear. With the 24/37 you'll run around 3000 at 75mph which should be just where your max torque comes in....PERFECT. You would be better off with a taller 1st gear like the 2.82 in the Baker OD but your overdrive will put a smile on your face with the 24/37...and it's just the outer primary that needs to come off...oh... and the clutch!

[Rsantucc]

The only real issue you have is that your 1st gear is 2.94, which with a 103 producing around 100 TQ and 100 HP, runs out of room pretty quick. Now you go to the 24/37 setup and your overall drive is lower still which means even quicker shifts from 1st to 2nd. On the other end however, on the road in 6th, IMHO, the rpm reduction of the HD 6 speed is too much in the 70-75 mph range. Believe it or not that motor still doesn't have the poop to run 2650-2800 rpm and pull an 800 bike with passengers and gear. With the 24/37 you'll run around 3000 at 75mph which should be just where your max torque comes in....PERFECT. You would be better off with a taller 1st gear like the 2.82 in the Baker OD but your overdrive will put a smile on your face with the 24/37...and it's just the outer primary that needs to come off...oh... and the clutch!

Your confusing me, based on the above trend with my chnaging out the tranny gears and addng the Screamin Eagle 6 speed I should see 80 MPH at 2920 RPM. You stated that if I change the primary to a 24/37 then I would get 75 at 3000 RPM, please explain why the massive change in RPM v MPH or do I get 75 at 3000 RPM in 5th Gear?
 [smiley=nixweiss.gif]

[jstites]

I have a 6 speed om my SEEG and love it. I just can't understand anyone buying one without ASKING ALL THOSE QUESTIONS BEFORE YOU SPEND THE $$$$$$$$$. I have some swamp land near Daytona for sale......you interested ?  

[PCC]

Per your own calculations...75mph/.02549  = 2,942 rpm. What'd I say...3,000? what's the issue? [smiley=confused5.gif]

If you run 80 plus ALL THE TIME ...then maybe the 24/37 isn't for you. I don't... and I find that if I'm in the 2,700 - 2,800 range the motor feels like it's lugging. It likes 3,000 much better...or 2,942!

[PCC]

BTW...I think you're using the stock primary and 6-speed formula. That would give you 2929 at 80mph and a 2.80 final drive.

The 24/37 changes the final drive ratio to 3.0.

I'm using Jerry's calc's.

[tmo465]

Robert....

I had the 6 speed installed along with changing the gearing from the stock 3:15 to the 3:37.  My 103 is stock, no pipes, aircleaner, etc and I usually ride 2 up and pull a trailer with it on trips.

My impressions?   Best money I have spent on any bike.  This is after putting 1500 miles on it in Daytona.   80 mph is just a tich over 3000 rpms.   First gear, though a bit shorter, is no problem for me and the increase in acceleration is noticable in 1st thru 5th.

I found myself clicking into 6th at 50 all the time and can apply light throttle and move right on up the speed scale.  Naturally you'll gear down for any passing.  But all in all,,,,I just love it..

Tom

[Thumper007]

my wrench say's it takes away 3 to 5 hp , is this true

[jeffj]

my wrench say's it takes away 3 to 5 hp , is this true

I would agree to that for a stock 88 motor be interesting to know on a 103


jeffj

[Thumper007]

 i'am looking to gain 3 to 5 hp , so thats enough for me not to get  a 6 speed

[MObe]

  I just read an article about the new dyna in American Rider magazine, they said that the 6 speed in the dyna has direct drive 6th. Is this really the case. If so I wonder if they did the DD6 to cut parisitic loss from an overdrive 6th.

[Rsantucc]

BTW...I think you're using the stock primary and 6-speed formula. That would give you 2929 at 80mph and a 2.80 final drive.

The 24/37 changes the final drive ratio to 3.0.

I'm using Jerry's calc's.

Actually I am not a racer so I guess the 6 speed I ahve will be just fine, a sI love 80 MPH at 3000 RPM can't wait to see the gas mileage