I'm kicking around a choice between an S&S T111 and the 124 for my 2009 Road King Classic. One of my concerns about the 124 is that it leads directly to additional costs in terms of driveline upgrades. What does the collective wisdom here say?

My anticipated use -- daily driver to work in moderate traffic; a fair amount of two up long distance touring, including days up to 1000 miles.

I'm not trying to build a monster, but as long as I've got it apart for the engine install, I'd just as soon put it back together right.

 

I've had my S&S 107" for several years now (2008), which has since been superseded by the 111". I really wanted a 124", but my local S&S man persuaded me that it wasn't a good touring engine. Now obviously the years have rolled by and S&S have not sat on their hands, as they now make a low CR version, which sounds much more touring friendly! It has the 585 cam, same as my 107" and I suspect would be just great!

To install my 107" we found that the compensator teeth were sharp, so changed that and the primary chain, also installed a stronger clutch spring. So even for a 111" you can expect some driveline expense. For a 124" a beefier clutch may be a good idea, especially if it will allow a sensible lever pressure, so you don't need weight training on your clutch hand!

As you will gather I had mine installed, so either talk things through with a suitable shop, or if you plan doing the swap yourself talk to S&S, or whoever you buy your engine from, for their recommendations and advice. You may well find installation instructions on the S&S website, for a preview.

Sounds a silly thing to say, in some ways, but the best change I made, for clutch operation, was a Diamondback clutch cable, which is significantly lighter and smoother than my original one.

If you chose a 124" I shall be eternally envious!

 

I put 124 in 2004 roadking lastyear bike pulls 149 torque. W/151 HP with direct link tuner

 

With headwork?