80 mph, whats that, 130 klms/hr? If so, i have a 99 r.k., had it up to that speed to see the bikes performance and it was smooth, no vibration, the engine felt really comfortable up there, just really windy...i like 80 klm/hr myself top speed...no tach so sorry

 

I run 80 all the time. No buzz but the gas mileage sucks. RPM is about 3500-3700 I think.

 

My 01 FLHR is comfortable at 80mph but the engine is definitely spinning harder. Wish I had a 6spd to slow the R's down just a bit.

 

My 01 RG runs great up there. Where I live, not many opportunities to run that speed but I usually take a road trip every summer, crossed ID, MT, WY, SD and MN many times running 85-90 most of the way, the milage is not too good for sure especially if it's windy. I just crank up the stereo, kick my feet out in the gyno position and try to stay awake! Only problem is that the cruise control won't operate very well form about the low 80's

 

The 3.37:1 ratio was only used on 99-01 EFI FLT bikes. Carbed bikes had the 3.15:1 ratio. Never heard any of the guys I ride with that have 3.37:1 ever complain about it. In fact, some of the carbed guys or 02 and later models have switched to it.

 

she runs smooooooth...with the se 6spd.:thumbsup:

 

I have an '01 Ultra, so I must have that gearing I guess. Why did the MoCo do that? Is one better than the other?

 

I have an '00 Ultra I bought used this year. I rode 80-85 most of the day coming back from Sturgis this year. It rode very well. I did not notice any buzzing at all. Of course, I traded in a sportster for the Ultra so the Sturgis ride was incredible by comparison. I do not remember the tach figgures, but the upper 3's sound right.

 

My FLHTPI is as smooth as butter up at that speed. I don't notice anymore buzzing there than at lower speeds. Mine is a 01 MM injected. keepem sharp

 

Smooth

as butta at any speed above idle

 

01 Ultra and the same goes for me

80-85 all the time everything seems fine.

 

The 3.37:1 ratio was only used on 99-01 EFI FLT bikes. Carbed bikes had the 3.16:1 ratio. Never heard any of the guys I ride with that have 3.37:1 ever complain about it. In fact, some of the carbed guys or 02 and later models have switched to it.

I've run the 3.15s, the 3.37, 3.42 and now the 3.57 combos. Here's the diff at 80mph

At 80mph
3.15 - 3400
3.37 - 3650
3.42 - 3700
3.57 - 3900

A lot of the buzzing and wondering if your bike is coming apart has to do with what you have in your bike. FrankenKing LOVES the 3.57 with its build. It wants the RPM and this helps it out. If there was a 6th gear, the bike would not be as fun to ride. I've run 80mph with all of these gears in the same bike over the years. I have to say it really depends on the build.

With that said: EdY - good to see you. You're right, I don't know anybody who has 3.37s worried about RPMs. In fact the Evo bikes had 3.37s in most model years of the Baggers. My friend has a 1990 80 stock bagger with 3.37s and loves it.

 

I'm ordering 3.37's from Zanotti's. $331.68 shipped including a new chain. Thanks everyone.

 

FLHR don't know ratio, I cruise great at 85. After 75 gas mileage drops to upper 30s. Only complaint I have is gutless at those speeds. But can cruise all day like that.

 

I have a 99'FLHTCUI Stage 2 Big Bore
I run 80 quite often. No problems.
70 mph is right at 3000 rpm
80 mph is right at 3400 rpm

 

6 speed on a bagger is 3000 rpm@80 MPH

First 5 gears are like stock. 6th is .85 vs 1.0 in 5th. Everything gets quieter. Even with only a stage 1 air and Screamin eagle pipes the bike pulls good from there.

 

My 00" Ultra cruises at about 32-3300 rpms at 80-85 I have the 3.37 gearing but I have done a lot of work to the motor...It does not get "squirrley" til you hit about 110...as for the noise...I am running TH, a TW6HG cam and roller Rockers so noise is just a given.

 

2001 E-Glide, carbed model, runs 3000 RPMs @70MPH & 3300 RPMs @ 80MPH. Anything over 2500RPMs is silky smooth, gets from 70 to 90 in a hurry and I believe it would run at 90MPH all night and day. -2$en#e-

 

As a rough guide or "rule of thumb", every tenth in your gear changes your RPM by 100.

An example would be, if your running 3,000 RPM @ 60 MPH with a 3.00 gear, you would run 3,100 RPM @ 60 MPH with a 3.10 gear. This is not 100% accurate but it's fairly close.

 

1999 flhtc-i runs 3000 at 70mph, 3400 at 80 mph-does this mean I have 3:15,s?-Al

 

See my post above. No you don't. Also keep in mind, the tach itself and graduations on it are not the most accurate piece of equipment.