V-Twin Expo. S&S Cycle Showing A 93″ Knucklehead Style Engine.

For the vintage enthusiast, S&S Cycle is showing their new 93 cubic inches KN-Series engine now in production. It is very close in appearance to the Harley Knucklehead but is offering more of today’s features in terms of power and improved reliability.

Aside from the much larger 93″ displacement, the main improvement in design is the 1958-1965 style flywheel assembly, which uses a splined sprocket shaft and Timken® sprocket shaft bearing. Although this necessitates the use of a 1955-1964 style inner tin primary cover and primary chain sprocket, the increased flywheel stability, strength, and power handling capacity are worth a slight departure from stock.

The initial KN93 offering is a standard compression 93 inch engine with authentic generator style crankcases for 1936-1947 Harley-Davidson® OHV big twin chassis.  The KN-Series engine comes completely assembled and ready to run with a preset S&S Super Stock™ electronic ignition system and Super E carburetor and is sold with a 12 month warranty. MSRP $8575. S&S Cycle. (V-Twin Expo Booth 717)

19 Responses to “V-Twin Expo. S&S Cycle Showing A 93″ Knucklehead Style Engine.”

  1. 1 Kirk Perry Feb 5th, 2011 at 7:09 pm

    The cam cover looks more real than the first S&S (Allen hex bolts) cover. This one has Phillips screws? Looks as though.
    Timken left case makes sense. Run the ’55-64 inner primary, but if you’re not going to install the lugsome “compensating sprocket”, then run a 25-T motor sprocket (lower height-stack,) and then the early “Diamond” pattern outer primary. I did – even used a wider-than-sprocket belt pulley. Not a problem. My ’59 motor looks like a ’53.
    Nice job slidemeister! 🙂

  2. 2 Neo Dutch Feb 5th, 2011 at 7:53 pm

    Cue the H8ers.

  3. 3 nicker Feb 5th, 2011 at 10:47 pm

    One great looking motor.
    Unfortunately, not in my budget……… 🙁


  4. 4 Convict Motorcycles Feb 6th, 2011 at 12:28 am

    Any shots of the LHS?

    Hoping it doesn’t look like an Evo, as some other Knuckle replicas do.

  5. 5 Wiz Feb 6th, 2011 at 6:59 am


  6. 6 Dale Feb 6th, 2011 at 7:27 am

    A piece of art. Nice!

  7. 7 zyon Feb 6th, 2011 at 9:09 am

    As much as I love knuckles, that price is why you see more and more Revtec’s on custom bikes.

  8. 8 Kirk Perry Feb 6th, 2011 at 10:00 am

    Imo, $8575.00 is very reasonable for an all USA motor.

    A 74″ V-Twin Knuckle retails for $8,807.00. The S&S motor is $372.00 less.

  9. 9 martin Twofeather Feb 6th, 2011 at 2:29 pm

    For what you get it’s price right and looks good……

  10. 10 Chopper Kid Feb 6th, 2011 at 8:10 pm

    Price is high. but not out of line. I agree that it is fair for an all American motor. If you think that is high, try pricing an original Knuckle bike.

  11. 11 Chopper Kid Feb 6th, 2011 at 8:15 pm

    I saw this knucklehead at the Davenport antique flat track race and swap meet that was beyond terrible condition as it was in pieces and had terrible corrosion issues and the guy was asking 15000 for that. You could easily build yourself a nice bobber with this motor for under 20. For 10% of the total project savings I don’t know why you would pick the rev tec over this S&S motor. Probably has many new engineering impovements over the orig knucks. What are you waiting for go out and buy one today!! 🙂

  12. 12 Axel Scherer Feb 7th, 2011 at 9:11 am

    All European Dealers welcome to buy the units through CCE. They will be in our 2011 catalog…Call your rep for more details!

  13. 13 les Feb 7th, 2011 at 11:38 am


  14. 14 mike corbin Feb 7th, 2011 at 1:06 pm

    I love that !

  15. 15 WILLIE@TROPICALTATTOO Feb 7th, 2011 at 5:54 pm


  16. 16 Rick Feb 7th, 2011 at 9:02 pm

    Great lookin motor. Priced about where it should be for what you are getting, a killer lookin motor that is bullet proof. If I had the scratch, I would definitely buy one and squeeze in a bike. Wiz, you crack me up.

  17. 17 Scott Sjovall Feb 8th, 2011 at 9:39 am

    Thanks for all the comments everyone. Working on the KN product line has been a blast for all of us here at S&S.

    As for the questions –
    Kirk, the screws in the tappet blocks and cam cover are the standard slotted/tapered 1/4-24 hardware.

    Convict Motorcycles, You can see the generator left side case in our catalog on page 4-63.

    The focus this weekend was on the new KN-Kone version (Knuckle top end on 70-up cone bottom end) and the new 74″ versions of the Generator and Alt/Gen motors. Something for all Knuckle fans.

  18. 18 Knuckle Lover Feb 8th, 2011 at 12:11 pm

    This engine is great! At the V-Twin Expo I seen a picture of the knuckle Sumax Cycle Products powder coated Black & Silver….. all I can say is unbelievable, can’t believe I ordered mine without the Sumax Powder Coat!!! If you are buying one be sure to ask S&S about color options because the sales rep never told me when I ordered.

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