They have improved also but they still make a little noise.

 

Don't understand all the fuss about the noise of gear driven cams, it aint bad at all! Of coarse you'll get a little noise! It's like a solid roller motor in a small block chevy, it's gonna make noise & your well aware of it, but you know that going into it. Sh** people pay money to get that gear drive noise in hot rods cuase they think it's "cool". These are harleys man, not a lexus!

 

As long as it's not the sewing machine noise that the motor already puts off, I really don't care. And as I understand it, these cams give it a nice lope that you don't get with the stock setup, so I doubt I'd care about a little cam noise.

 

+1 with Chad. Whats all the worry?

 

Gear drives have a very cool whine to them, at least in cars. I can't say that I've heard one on a harley, and even if you could hear it, maybe you need a louder exhuast to cover it up

 

The gear driven cam will give you more accurate activation of the valve train . This is because of the slop/stretching in the chains over time. I have an 06 WG and seriously looking at the gear driven as an option. By the way make sure you get the helic (SP?) and not the straight gears the helic is supposedly quieter if noise is an issue.

 

How much do these cams run?

 

One thing to consider when making more HP in the twin cam is the crankshaft coming out of true. I've read about TIGing the crank to prevent it. The result of a shifted crank can be a grenade going off in your cam chest if you have gear-driven cams.

I am buying parts for a 95" build that will not include gear drive simply because I don't want to go into the bottom end on this go-round, so I'm keeping the roller chain and having headwork done to make sure my cam selection will have the ability to breath.
When, or if, I go with a stroker crank I will have it "trued and glued" to make sure the "belt drive" cams in the next build will be able to twist me off the seat and not worry about things coming apart from too much torque.

 

there belt drive system and the case that contains it looks pretty trick (ie expensive!)

 

These ones I specifically asked about and the TW-6-6's like Last Saint has retail for $390 on the Wood website.