cylinder height

[randallwhitman]

Does anyone know if a 4 1/2" stroke uses stock height shovel cylinders?   

[shovelbill]

randall,
i'm almost positive (99.9%) if you want to make it an 84" it will use the stock height cylinder, which is 5.330" tall.

[bob_e95482]

My 84 incher uses my stock length jugs. But I believe if you go big bore, you'll need longer cylinders.

[randallwhitman]

The motor's been built for years with Axtell 3 13/16" bore jugs.  I'm just changing exhaust, and I'm wondering about the exhaust port spread.  Why would a big bore require longer jugs?  Years ago it was an SnS Sidewinder kit at 4 3/4" stroke, and that required .250 (or .200?) longer jugs.  It's currently 4 1/2" stroke.  Randy

[76shuvlinoff]

Randy,
how's that set-up hold up and run for you?    Someday I'd like to do that on my 93"er staying with the 4.5 inch stroke.
It's an S&S mill so I'm not worried about cutting on factory cases or heads.

$omeday

  Mark

[KingofCubes]

Here's a 93" that I just did for Keith Crane from Wisconsin, It's going in a 83 FXRS.

[attachment removed after 60 days by system]

[bob_e95482]

I just looked on J&P and their Super Sidewinder 3 5/8" jugs are used for 4 1/2, 4 5/8, and 4 3/4 strokes. They are .200" longer than stock. My thinking is piston heights and clearance at the bottom of the stroke.

[Old Crow]

My '82 FLT has an S&S 4 3/4" stroker kit in it. I'm using stock length cylinders with stock 3 1/2" bore for 92".  I've got it apart at the moment and just had all the machine work done to freshen the top end.  The pistons have some *really* short skirts on 'em because of the stroke and had to come directly from S&S. 

[randallwhitman]

Mark......My setup, and all of them, start out at 102.7 cu. in.  Mine's .030 over.  My shovel is my bomb around town bike, but I do take it on a 400 mile round trip on the Key West Poker Run every year....in rather exteme heat.  I'm sure I ride less than 4,000 miles a year.  Seems fine.  Had the heads off recently for new rocker boxes and the bores were a little on the smooth side, but no oil usage to speak of and zero smoke.  When the heads came off, my favorite wrench (I'm getting too old to bend over a bike for very long) talked me into getting rid of my Jerry Branch heads (HD) and going with SnS heads.  I'm sure he wanted my old heads for a project bike.  The old Jerry heads had been milled .045 and the motor had about a 9.8:1 CR.  The SnS heads got a mild port job and no milling.  The bike really hauled ass with Jerry's heads and it's still pretty strong.  With the old heads, I had to set the timing at 26 degrees......any more and it would knock.  I love it....great setup.  Only quirk about it is that you have to plumb the heads with a fitting to get the oil back to the cases with a rubber hose.  The Axtell jugs are so big that there's no room for the oil return hole.  Go for it.  Bore the cases, and buy jugs and pistons, plumb the heads, and haul ass!