Been looking at this for about a month. I would like to have some more power but cant decide which way i should go. It seems that most people say that your gonna need to do cams... ok and then your gonna need to do this and that. Can i please get what exactly the real cost Vs.benefit ? I want more power but i am not looking in dumping 5k into the motor.

"Despite what some say, bigger is better, and if making something bigger is easy, that’s the best! A big bore kit is an easy way to achieve more displacement, and if you can install it without rebalancing flywheels or boring the crankcases, that’s about as easy as it gets. That’s the idea behind the new S&S® 97" big bore kits for 1999-’06 big twins and the 106" big bore kits for 2007-up big twins. No need to bore or even split the cases, just do the cylinder and piston swap. In addition to the ease of installation, they look great because the cylinders are available with the same silver or black wrinkle powdercoat as stock, so they match the stock finish of your engine.

At 3.927" bore, these cylinders have the largest bore that we feel can safely be used in a cylinder with stock spigot diameter. In fact, this kit is only offered with S&S cylinders because, even though stock cylinders can physically be bored to fit the 3.927" pistons, we are not confident that the material used to make the stock cylinder liner and spigot is strong enough. The cylinder liner material in S&S cylinders is much stronger, and has proven its ability to stand up to the added power in numerous dyno pulls, street miles, and a lot of quarter mile drag strip runs. There is a trade-off for the ease of installation, which is that only one piston oversize is available for this kit. This really is as big as we are willing to go with a stock diameter cylinder spigot."

 

106" is good. Why do you build your engine? Well, it makes the wind a non factor, your bike will pull you right through it. Your bike won't work as hard at crusing, and neither will you. Where you hold the throttle is how fast you are going. I've done some cosmetic work on mine, however, the most beneficial thing I have done is build my engine. Bike runs so much better, it's truely a beast.

 

I would do cams at the same time. You might as well as you will be in there anyway.Hit me up for discounted pricing. It looks like retail is $1359.

Drew

 

Just curious, doing a build like this what will gas mileage drop?

 

Not sure..my mileage isnt that good to begin with

 

How much do you want to spend and what do you want to get out of it?

Regarless of what kit you want, compare apples to apples. You will still need a good exhaust/aircleaner and an ecm tuner on top of the kit. And you need to make sure the parts will work good together.

 

I have S&S 106 (10 to !) and S&S 510 gear cams. FUN FUN FUN sounds great and runs like a rabbit.

 

Yeah, and then there's working on the heads, polishing re configuring etc.

I had a 103 installed, and all of the above work mentioned was done: Pipes, air filter, cam, heads, bored out to 103, power commander, dynoed etc. It's not cheap. Oh yeah, had a new heavy duty clutch to handle the power too. There's a lot more than just displacement.

I get over 100hp and 100lbs of torque at the wheel, not the crank.

 

It is endless. Whats better than power......more power. The down side is finding the weakest link in the middle of no place.

 

The weak link in post 02 Twin Cams is the crank and the crank bearings. The cranks slip. If someone has just upgraded the cam chest with upgraded tensioners, cam plate, sent the heads out to get worked just right, and spent all the money on the cylinders, pistons, and tuning; it only makes sense to split the cases and have the wheels trued and welded. Balanced if you want.

Then you can have the confidence in the motor. Of course if you're gonna split the cases you might as well go big. 124? 128?

How big is your bank account or credit limit?