S&S 107, Upgrade options?

[mittens]

So planning to address some things this winter. I have a gasket leaking at base. Plan to check what cam is in bike as well. Want a 600 if its not already there. But What options are there for Big bore? or stroker? I see all kinds of kits for M8 and stuff. But nothing for S&S motors.

I have a 04 107 S&S, S&S heads and Rocker boxes.

 

[HMAN]

117 bore would be the top on stock jugs.

 

[mittens]

So bore stock Jugs out, swap pistons, and re-use heads?

Or you mean Buy 117 Big bore kit, Jugs, pistons, gaskets?

also 10 CI may not be worth the cost vs just redo base and head gaskets and clean Jugs and heads up.

 

[HMAN]

117 is as far as you can push the stock jugs. If ya want more hp you need bigger jugs(giggity). I think you use 124 jugs but ur talking lots of work. Someone with more knowledge will chime in and correct me.

 

[aspen874]

I would suggest you talk to John Sachs, he is a member here and also an engine guru.

 

[mittens]

lots of work? So you are not just swapping jugs, pistons, and bolting it back together when talking 124? What is the other work? machining block, or heads or something to make it work?

Maybe someone will chime in. The 107 runs good, and probably going to get more power in other ways. But I have to fix a gasket issue anyway, so looking at options. when pulling Jugs and heads off. I want them polished/ cleaned at least. old fins are dingy and not shiny like the rest of the bike.

 

[DreamFire]

I thought about raising the compression by decking the heads to 10:1 or higher. I hear the stock heads flow good enough. Cam change to 600 or 592 ect . Bigger jets for the carb. Only if I have to ever go into the motor that is. I don't feel like the 117-upgrade cost would be worth it unless rebuilding anyway.

 

[Jersey James]

I think my " Little " 107 (03 Pit Bull) runs great. Mine has the 600 cam, and an old Triple X reworked G carb. I can keep up with most 117 inch bikes. Plenty of power.

 

[SCOTTx88]

I think my " Little " 107 (03 Pit Bull) runs great. Mine has the 600 cam, and an old Triple X reworked G carb. I can keep up with most 117 inch bikes. Plenty of power.

I agree, I've hurt some feelings and cost a bunch of $$ because of my little 107.

 

[mittens]

After this thread, I tore it down, fixed base gaskets, polished whole jugs and heads, and did a 600 cam. Runs great.

 

[Jersey James]

Sounds great. If you haven't already done so, and would like to take it up a notch. Have that S&S G carb reworked. That will really wake that 107 up...

 

[mittens]

What was done to the G Carb? I have G Carb Modded for swappable Air bleeds.
running 0.33 Inter, 0.76 main, and .50 bleed. Tried a 78, but its hiccups swapping jets. so back to .76

 

[DynoDave]

My '02 Mastiff had a S&S 107 with a 600 cam and a XXX Mini Taz carb (Super G modified). Ran fantastic! Unfortunately, XXX went out of business because owner Bob Maltz died a few years ago.

 

[john sachs]

My '02 Mastiff had a S&S 107 with a 600 cam and a XXX Mini Taz carb (Super G modified). Ran fantastic! Unfortunately, XXX went out of business because owner Bob Maltz died a few years ago.
View attachment 136492

Take the "Bomb Sight" out of your XXX carb,, put a stock emulsion tube back in it, and you will pick up more power. I've proved it many times. I can up grade an "E" carb, which is 40 mm, to the same size bore as a stock "G" carb. Obviously, I can make a "G" 47.5 - 48 mm. Here are a few boosters, (BOMB SIGHTS) I've removed to restore power that a worked "E" or "G" carb should make.

 

[mittens]

I have seen those carb set ups but I don't have any issues & runs good. I will say after cam swap less flames hahaha

 

[DreamFire]

Take the "Bomb Sight" out of your XXX carb,, put a stock emulsion tube back in it, and you will pick up more power. I've proved it many times. I can up grade an "E" carb, which is 40 mm, to the same size bore as a stock "G" carb. Obviously, I can make a "G" 47.5 - 48 mm. Here are a few boosters, (BOMB SIGHTS) I've removed to restore power that a worked "E" or "G" carb should make.

Do you sale the carbs or upgrade someone's?

 

[john sachs]

Do you sale the carbs or upgrade someone's?

Both. Sell, and Rework/Up grade yours.

 

[mittens]

So what are you gaining with a direct third jet?

 

[john sachs]

So what are you gaining with a direct third jet?

A third fuel circuit. It makes the tune up easier, and properly jetted, with the low end , mid-range and top end tune up . IT WORKS .

 

[mittens]

SO for example in my cas, 107 with S&S 600 cam.

I am on a .33 intermediate jet, and a .76 main with a .50 air bleed.

what would be the starting set up with 3 circuits? sizing wise, and what rpms ranges are the splits then?