ditto said:
I want to add a 6 speed to my 05 FLHTCUI 106 ci.
The SE 6 is is about $300 less than the Baker DD6. I would like feedback from people that have either as to which one you think is the better way to go. Installation is not an issue I am concerned with.
Please help me make up my mind, I want to add the trans. this winter.
Thanks
Ditto,
I have had a DD6 since August of this year. Now the kicker. It's still not installed. It's going behind an S&S 124 I will have had sitting for a year next month...LOL. All I can give you are my reason for choosing it.
1. Runs quieter than the OD6s. I've ridden bikes with both types.
2. I like 24/37 type primary gearing and the DD6 comes very close to acheiving this. It's called an effective 1.5 ratio 1-5 by Baker with stock secondary 32/70 sprockets.
When ran straight up with 28/36 primary gearing and 32/70 secondary gearing it's and
effective .89 1:1 6th gear. At 80 MPH in 6th gear in turns 10 RPM more than the
SE .89 OD6.
Change the 36 tooth clutch sprocket out to the HD 37 and it become almost the same .86 ratio as the Baker standard OD6with 24/37 & 32/70 3.37 final drive ratio.
With a heavy bike and or rider you get a better mechanical advantage in 1st - 5th gears than you do with either of the other 2 ODs unless you change the primary gearing out with the other two and with 37 clutch basket you have an effective .86 1:1 6th gear that is turning fewer RPM than the SE/Jims OD6.
3. Baker started offering the DD6 with an effective 2.94 1st gear option this year. Prior to this first gear was slightly lower than stock 5 sp transmission and with 28/37 primary about a 3.77 first. With the effective 2.94 first is less of a granny gear and becomes a little more useful on the street.
Transmission type with 32/70 secondary drive RPM @ 70 MPH, RPM @ 80 MPH
Stock trans 25/36 Primary 2940 3360
Stock trans 24/37 Primary 3174 3597
SE/Jims .89 Ratio 6sp 25/36 Primary 2615 2990
SE/Jims .89 Ratio 6sp 24/37 Primary 2799 3199
Baker .86 Ratio 6sp 25/36 Primary 2528 2889
Baker .86 Ratio 6sp
24/37 Primary 2706
3093
Baker DD6 Ratio 6sp 28/36 Primary 2625 3000
Baker DD6 Ratio 6sp
28/37 Primary 2697
3083
4. Since I'm converting to chain 28/37 primary gearing and 23/51 secondary gearing gives me a 3.37 5th gear as 5th is a 1.15 ratio and a 2.93 final drive ratio. SE/Jims would give me a 3.41 5th gear and a 3.0 final drive ratio. Couple of 100 RPM less at 70 and 80 MPH than the SE/JIMS, plus I can change both 5th and 6th drive ratios by swapping clutch basket from 37 to 36 and rear sprocket. Get several more final drive combinations of 5th and 6th than either of the others will produce without going the extra labor of to swap out the Tranny sprocket if I find the engine & bike likes taller final drive ratio.
*************************** 5th * 6th 70 mph 80mph 75 mph rpm
28/36 Primary 23/47 secondary 3.02 2.63 2462 2802 2627
28/36 Primary 23/48 secondary 3.09 2.68 2504 2862 2680
28/36 Primary 23/49 secondary 3.15 2.74 2556 2921 2737
28/36 Primary 23/51 secondary 3.28 2.85 2660 3041 2850
28/37 Primary 23/47 secondary 3.11 2.70 2520 2880 2700
28/37 Primary 23/48 secondary 3.17 2.76 2573 2941 2757
28/37 Primary 23/49 secondary 3.24 2.81 2627 3002 2815
28/37 Primary 23/51 secondary 3.37 2.93 2734 3125 2930
Bottom line all three work well and will get the job done. You might want to take a look at the Jims and Baker R ratio ODs also if you less RPM drop between shifts. Another option is the JIMs Fat 5 OD 5th gear. 1-4 gears have longer legs that the 5 speeds are OD/DD 6 speeds. More rpm drops between shift but gear are beefier/wider than the others. Another option is the REV TECH 6 speed. Cheaper than the others and have seen no proplems with these since they fixed that one that everyone seem to remeber. 5 year warrenty and if needed and they stand behind it.
