I would like to fine a link or have someone on this forum help me. Im looking to fine the right sproket's for my sporty. Right now I playing with a 22 and 23 plus a 24 teeth drive with a 51 teeth on the rear. This weekend I went on a ride with the 22 teeth drive. My tec said 2500 rpm @ 65 mph. Does that seam right?? Im looking to keep my rpm down and still ride at 75mph. And someone here help me please..
Ironhead Tommy

 

The most common choice is 51-23 which yields about 3000 RPM at 60 MPH, 3500 RPM at 70 MPH.

What year is your bike? Depending on the year of your bike you may have to grind a little off the sprocket cover to fit the 23 or 24. I had to grind some on my 1980 to fit the 23; a 23 went right in on my 1978.

I have not tried a 24.

Here is more info [click on FolderActions] ...

https://skydrive.live.com/redir?resi...A8undrMq1KaeQs

 

Thanks IronMick, The year of my sporty is a 1977 XLH. Im know that all drive gear's will fit. Just trying to found the right one. I well change out the 22 teeth sproket to the 23 teeth one.
Thank's Again IronMick

 

That's your bike in the pic right? Looks like a right side shift to me, unless my eyes are fooling me. That would put it at 1974 at the latest.


Carl

 

A 22/51 setup with 2500 rpm @ 65 mph doesn't sound right to me. I would guess closer to 3500 rpm @ 65 mph with that gearing setup, unless something else has been changed like primary gears, transmission gears, or a much larger diameter rear wheel. Or, either your speedometer or tach (or both) could be off.

 

Carl your 100% right. The bike in the picture is one of 4 sportster's that I own. I have a 1966 XLCH, 1969 XLCH, 1974 XLCH, and a 1977 XLH that I bought New. (I also ride a 2009 Dyan Low for the long run's.) Just had the motor rebuild by Chicago Harley on the 77. This is the first time Im playing with Drive Sprocket's. Like to keep my R.P.M.s down a little. Love the idle of blowing by a New Harley on the highway. LMAO

 

83XLX: I look at the drive gear again and it's (counted it twice) a 23 front 51 rear. The only change on the bike is the rear tire is a size 5:00x16 not the 18 inch I had. Other then that it's all stock..
Thank's

 

The rear tire size of 5.00-16 is going to be the same OD as that of a 4.50-18 tire, or close enough, so no difference there.

Using a 23T front and 51T rear is the perfect highway gear for an ironhead. This gives a final gear ratio of 3.84:1

If you put a 24T on the front you most likely will have to slip the clutch a bit to take off from a dead stop, but once you get to 65 mph it will be great.
So I would use a 24T for one thing........... Riding across the country and making only two gas stops for the entire trip.
In other words, keep the 23T.
pg

 

i run a 23 front and a 47 rear ,ride 2 up all the time never any problems at all, wish i could go more she is still screamin good at 65 , been reading up on using a 5 speed from a early evo may give it a shot sometime

 

Shepdog, I know that you can change the gear's in the trans to a wide 1th gear to make up the spread from 2 to 4 gear. I'm looking into that also.. Good luck on the Evo trans.