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post #1 of 11 (permalink) Old 05-31-2013, 09:23 PM Thread Starter
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Stroker

I've got a 2011 RGC with a S&S 106 big bore, 585 cams, runs great....but....I'm thinking this winter I'm going to pull it all apart do the timken conversion, heads, and am thinking of putting a stroker crank in.
Anyone have any opinions...?
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post #2 of 11 (permalink) Old 05-31-2013, 09:26 PM
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If your going to split the case why not go 117 also?

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post #3 of 11 (permalink) Old 05-31-2013, 10:08 PM
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Agreed if you are splitting cases, that is the time to go bigger dang sure won't be after you have put it back together.....

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post #4 of 11 (permalink) Old 05-31-2013, 11:00 PM
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Stroker IS going bigger guys... :-)

I've got a 4 5/8 stroke in my Evo, runs great. I've been thinking about going the stroker route with my current bike when I replace the crank. But most likely will stick with the 4 3/8's stroke and go with bigger bore.

Strokers present several challenges. Fewer piston choices without going custom. Potentially taller engine. Higher piston speeds and shorter engine life. Cases typically need clearancing (at least Evo's do). That said, 4.5 X 4.060 = 117" but to keep this in perspective you can also get 117 with the same 4 1/8 bore and (stock) 4 3/8 stock stroke. The S&S 106" jugs (3 7/8) will require custom pistons to go with a longer stroke or you can sell them.

That said, if you want a 124, you will need a stroker crank and bigger bore. Better to pick up a complete engine in that regard.

You definitely should discuss with your builder, or A builder if you are going to do this yourself. Some combo's just don't work well and you can dump a crap load of money into a stroker build and be unhappy with the result.

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Last edited by rageglide; 06-01-2013 at 01:15 PM. Reason: typo
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post #5 of 11 (permalink) Old 06-01-2013, 06:48 AM
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Quote:
Originally Posted by Knuckles View Post
I've got a 2011 RGC with a S&S 106 big bore, 585 cams, runs great....but....I'm thinking this winter I'm going to pull it all apart do the timken conversion, heads, and am thinking of putting a stroker crank in.
Anyone have any opinions...?
Your 106" cylinders will no longer work at that point.
You may be better to work a 124" S&S crate motor over, to establish the power wants/needs your looking for.
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post #6 of 11 (permalink) Old 06-01-2013, 07:19 AM
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if doing that much work,by all means go 124"
post #7 of 11 (permalink) Old 06-01-2013, 08:07 AM
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Shows what I know...I thought the S & S engines had Timken bearings stock.
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post #8 of 11 (permalink) Old 06-01-2013, 10:18 AM
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Quick question. Why not just drop in Harleys 120r engine and be done with it. I just rolled 36k on a 2010 RGC. My thoughts are, when I reach approx. 140k I would drop in the 120r.

Help me out here, is my thinking all messed up??

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post #9 of 11 (permalink) Old 06-01-2013, 01:34 PM
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Quote:
Originally Posted by Torquey View Post
Shows what I know...I thought the S & S engines had Timken bearings stock.
He has S&S's 106" jugs and pistons, instead of Harley's. Not a complete S&S engine.


@Nevadasun
If I was considering a 120R, I'd scrounge up the extra cash and go with the S&S 124". The 120R is nice, but it still has many of Harley's design weaknesses present, (like no timkens, tapered rod ends, no rod races, etc).

The S&S will be more reliable in the long term with tougher cases, a better crank with superior rods, timken crankbearing, etc.

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post #10 of 11 (permalink) Old 06-03-2013, 07:10 AM
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Right on!
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