Because it is a solid sprocket, there is no compensator funtion to it.

 

My engine builder made 4 suggestions. A larger Wimmer A/C, a SE compensator, an AIM variable pressure clutch and a smaller front sprocket to gear it down.

I bought and installed the first three suggested mods, but I didn't gear it down. I figured the build gave me enough torque to pull strong with the stock gearing. Living in the open roads of the West, I see triple digit speeds a lot, I don't want to trade that for the closer gears and shifting, just to gain more rapid acceleration. I have a gear for every need already and no problem getting up to speed in a hurry.

I always geared my off-road bikes, for the next race, to handle the fastest straights that sometimes were over 5 to10 miles at a stretch in a 100 mile desert race. I gear the Harley the same way. If your maximum held speed is under 75 MPH, then gearing down makes sense and your off-the-line acceleration will improve.

 

While I agree with you in theory, the reality is the 6 speed is geared too high for most.

The difference between the 32 and 30 tooth is roughly the difference between cruising in 6th gear at 70 mph and 2200 rpm with the 32 and cruising at 70 mph and 2500 rpm with the 30 tooth. Since 2500 to 2900 is the sweet spot for cruising on the TC's, that makes it just about perfect.

Not a big difference at cruising speed at all, but it does give it just the right jump off the line.

 

Your bike is a TC88, OPs is a TC96. I fitted an SE 21T compensator kit (came with chain) to my 03 T-Sport, which really woke it up! Made the bike a much nicer ride.

Do TC96 Dynas suffer from the same newer compensator as Touring models? If they do then changing that is not so easy, although that is the best place to make gearing changes.

 

I know

Wow a 21T, the 23T I though was low, can't imagine what a 21T would top off at.

 

Just put a 30 tooth on mine today.............it is real smooth through the gears, I'll ride it a few days and see how all the variables will be.

 

Perfect. Is yours a 96. Do you have a tach. Is it a 6 speed.I am wondering what the revs are at 75 mph. How does it pull as compared to before. Can you update this thread with your impressions and weather you figure it's worth it.

And I want to thank everyone who posted. I really appreciate your help.

 

It gave 20mph per 1,000rpm in top. Lifted normal road speeds above that rough patch just under 3,000rpm into the sweet zone. Bike is lovely to ride above there! Would pull from below 40mph to over 100 in one long blast in top gear. Well worth trying......

 

Yes it's a 96cu.in. motor with 6 speed. although it has SE 259E Cams (#25482-10) and SE Pro CNC Heads (#16500013A), that have been shaved and tricked out. I am running triple digits in HP and Tq.

Yes I have a Speed/Tach combo. You ask what RPM's I turn at 75 MPH. Well I have to shift into third gear at that speed, so it is up at around 6000 RPM or I hit the rev limiter at about 80.

I will run the bike through its paces tonight after work and see how it responds compared to before I installed the 30 tooth gear. I do know as of last night, that it most definitely goes through the gears quicker, as the wrap up through the power-band is tighter.

I will be checking the roll-off in each gear in order to determine throttle responses. (all of this will be in an area where it can be done safely)

It has the feeling of being a stump puller.

 

Make note of your speeds and RPM's in different gears, I think that would be the most helpful.