There is much talk about whether the slim s with its 110 engine is a dog or a quick big bike.

Those of you who have ridden it - how fast is it off the line?


Thanks
Rex

 

If you're looking to be the first to the next bar an HD may not be what you're looking for ... just sayin'

 

Exactly the same as every other Harley on the planet! Just depends on how far you twist the thingy on the right and how fast you let go of the thingy on the left!

 

I'd sure like to see a serious reply to the OP.

 

A little bit faster than one with a 103"...

 

Hmm is it though, is it any faster than an 88 straight out of the box with no stage 1 etc, think it my be heavier, although having said that I was surprised to see my 06 Nightrain weighs the same as a Breakout.

 

Unless built up properly with compression a softail will never be quick off of anything.

 

To correctly answer the OP's question, a race on the 1/4 mile against the clock with a 100% stock 103" and 110" engine is in order. The same rider should be used on both bikes to rule out the human variable.

 

...with SE255 cams and a high flow intake.


I have a new Slim S. It's broken in with 1000 miles, but I haven't added the slip-ons yet. I did run autotune on the PV to clean up the stock tune.


If you are expecting a true hot rod Big Twin, you're fooling yourself. HD still has to meet EPA emissions regulations. But...


Two bikes ago, I had a Dyna Street Bob with the 103A motor. I installed SE255 cams (same as in the new S-Series bikes with SE110" motors.) I also had a V&H Pro-Pipe and S&S Stealth intake.


If you know cams, you know that the 255 is a torque cam and doesn't rev out like aftermarket cams, or even some of the other SE cams. It does however produce torque right off the clutch at lower RPM than other cams. Most cams have a small ramp between 2000 and 24/2500 RPM. The 255 starts strong at around 2k.


My Dyna, when new, weighed 672lbs wet and the Slim S is 712lbs wet. The Slim S still accelerates quicker than the Dyna did. It's not a lot quicker, but the torque is a stronger and stays strong through the normal SE255 range, which is about 5k rpm. The cams taper off at that point and don't pull that hard past 5k. This is how the 255 is designed, but it works great with the big displacement.


I've already posted the same statement, and I will again because it's true. The Slim S (and likely the Fat Boy S) in stock form won't run with an aftermarket Fuel Moto 107 or S&S 106 with higher revving cams. It will stay close, but they just don't rev out like a built hot rod motor. Somebody mentioned compression too. Even though the motor has some SE parts, it is still 9.5 or 9.6:1 compression.


With all that, the motor is brilliant. It's the first factory HD I've ridden that has "enough" power in stock form. Shift at 3500 in normal riding and right at 5000 when hitting an on ramp hard, both bring you to speed very quickly.


I'm adding Rush slip-ons today if the UPS guy would ever get here. Opening the relatively quiet exhaust should give it a bit more thrust.


In the end, if you want a hot rod Twin Cam, have a motor built by someone that isn't restricted by regulations; if you want a factory motor that runs and accelerates really well, take the S-Series for a ride.

 

I can see much difference if they are both stock