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[porthole]

Why a DD6? Why not an OD6

If you put a Screamin Eagle gear set in the bike you are stuck with it. The SE kit modifies the case by removing a boss the holds what I think is the fork support rod.
With many of the other manufacturers OD 6 you do not remove this boss.

The DD6 has several advantages over standard 6 speeds.

For one, in 6th, it is direct drive (the DD in DD6).
Direct drive is more efficient (when in "direct") as there are no parasitic losses from the transfer of power through the gear train.

The Baker gear set uses "helical" cut gears in 4th, 5th and 6th.

Helical gears are quieter then "straight cut" gears.

Helical gears kind of look like this:
///////// \\\\\\\\\

They mesh together like a screw, which is why they are quieter, but not as strong.

To offset the lack of strength, Baker uses straight cut gears in 1st, 2nd and 3rd.

Not real easy to see here, but the helical cut gears are at the top of this picture

[porthole]

The standard 5 speed uses all straight cut gears

[porthole]

Another advantage to the DD6 is a new gear ratio. The DD6 internal gear ratios are lower then factory gears.

To offset this difference in ratios, the kit is supplied with a new primary chain and a 28 tooth comp sprocket.

This 28 tooth comp sprocket overcomes the internal gearing change and the overall gear ratio is close to the original 5 speed, with the addition of 6th gear, in direct drive.

The advantage of the 28 tooth sprocket is the approximately 14% more starter torque.

Below, the stock and Baker comp sprockets.

[porthole]

Duane, you've got me hooked on this install thread, keep us updated upon the parts arrival!  Roger

Will do.

No Roger NO!!!

See all the chit that happens when you change.....tell him Duane....tell him

OK - Go for it Roger 

[erniezap]

Threads like this are what makes this site great!  The pics and commentary are awesome!

[Trapperdog]

Absolutely agree with Ernie! The side by side comparison pics of parts is a big help to those of us who have only heard why a particular part is better or different. Appreciate the members that can multitask a project....wrench/photograph/post...I can barley do one at a time

[1711tab]

Another advantage to the DD6 is a new gear ratio.The DD6 internal gear ratios are lower then factory gears.

To offset this difference in ratios, the kit is supplied with a new primary chain and a 28 tooth comp sprocket.
Stock and Baker.

This 28 tooth comp sprocket overcomes the internal gearing change and the overall gear ratio is close to the original 5 speed, with the additon of 6th gear.

The advantage of teh 28 tooth sprocket is the approxmitly 14% more starter torque.

The Baker OD6 is for High HP & TQ Motors as the Baker OD6 is stronger (gears) than the DD6 is...

[Boatman]

Threads like this are what makes this site great!  The pics and commentary are awesome!

When you are working on something, it is sometimes hard to stop and take pictures.  Much appreciated Duane.   Looks like a caveman could do it.     

By the way, the tranny case cleaned up nice.  Regarding the seals, the HD seal "looks" better than the cometic as you stated.

[porthole]

By the way, the tranny case cleaned up nice.  Regarding the seals, the HD seal "looks" better than the cometic as you stated.

Very little cleaning required Bob, inside or out.

I see I also missed a post/picture of how I avoided the press for the primary bearing. Will take care of that tomorrow.

[DCFIREMANN]

Duane just to throw in my 2 cents. In a touring bike I would never run a DD6. I would run only and OD6. You touring bike is on highway most of the time. IMHO that is the only time you will use OD.

Be Safe

THE DAWG

[porthole]

Duane just to throw in my 2 cents. In a touring bike I would never run a DD6. I would run only and OD6. You touring bike is on highway most of the time. IMHO that is the only time you will use OD.

Mike - gave it a lot of thought before I picked one over the other.

The advantage of the DD is that it is relatively easy and fairly inexpensive to change the overall ratio. Your talking a one time cost of a primary chain and comp sprocket, a gasket and oil and a couple hours work.

Should I decide to add a trailer for the bike this was the route I wanted to go.

Could also change the primary gearing which I would have done had I gone the OD route.
I didn't do this for the gas mileage - did it 'cause I wanted too.

If I can tailor the gearing to my riding style with just the comp sprocket, then this is good.

Of course - if I don't like it  - I already have the tools - I can revert to the stock 5 speed and sell it on eBay. And everyone can say "told you so".

Wouldn't be the first time I put some thing on and then changed it later - did I mention how many seats I have gone through?

[1711tab]

Mike - gave it a lot of thought before I picked one over the other.


O course - if I don't like it  - I already have the tools - I can revert to the stock 5 speed and sell it on eBay. Wouldn't be the first time I put some thing on and then changed it later - did I mention how many seats I have gone through?

Amen on the seats...

[DCFIREMANN]

Mike - gave it a lot of thought before I picked one over the other.

The advantage of the DD is that it is relatively easy and fairly inexpensive to change the overall ratio. Your talking a one time cost of a primary chain and comp sprocket, a gasket and oil and a couple hours work.

Should I decide to add a trailer for the bike this was the route I wanted to go.

Could also change the primary gearing which I would have done had I gone the OD route.
I didn't do this for the gas mileage - did it 'cause I wanted too.

If I can tailor the gearing to my riding style with just the comp sprocket, then this is good.

O course - if I don't like it  - I already have the tools - I can revert to the stock 5 speed and sell it on eBay. Wouldn't be the first time I put some thing on and then changed it later - did I mention how many seats I have gone through?

Duane I don't want to talk about seats!!! I did not know you were thinking about a trailer. If you pulled a trailer the OD6 would be NFG!!!!!

Be Safe

THE DAWG

[Talon]

Nice job Duane, thanks for the great pictures along the way, really great that George's Garage sent the new plate with no hassles, good customer service!

Craig

[DCFIREMANN]

Nice job Duane, thanks for the great pictures along the way, really great that George's Garage sent the new plate with no hassles, good customer service!
Craig

That is what it is about in these ecomonic times. It is great to find vendors like this.

Be Safe

THE DAWG