I remembered cruderudy had posted several times about his good experiences with emachineshop so I decided to check them out. Looks very interesting.

What do you think about the idea of a Titanium countershaft sprocket nut? I should be able to measure the stock one out with a simple calipers and draw up a CAD file. I just read that Ti is about $30/lb so cost of material should not be a major issue. Ti is hard to machine however and that must be why Ti Parts are so expensive.

Any guess on the price they will charge before I take the time to draw this up?

Think it is safe? I can't see why not as long as it is an exact copy of the OEM nut.

According to a quick google, titanium is considered to be non-magnetic or to react far less to a magnetic field that ordinary steel. That could be the deal breaker. The countershaft sprocket nut has to react to the speed sensor on the Gen1 and the speed sensor, I believe is a magnet. I do see magnetic Ti jewelry advertised so perhaps there is some way to magnetize Ti.

There is a company that casts Ti parts. Better, worse, same as machining?

Any thoughts?

* Last updated by: Rook on 2/15/2020 @ 11:48 AM *

See those spaced blocks on the nut? You'd have to make a steel sleeve to go over the nut. Probably an interference fit so it doesn't walk. Shit, then you'd have two heat movements and who knows if it spins off or snaps from the expansion of the ti. I have no clue. To many engineering feats for me. I'm wondering what kind of signal if at all happens with just that one strip of counts. Then, is the count block cut sharp, or round at the [leading/trailing] edges like the cast looking OE?

Code wise, backup to full power is not worth fooling with sensors,pickup positions, tone wheels of all combinations, including the nuts designed for said, I said, it ain't my bike or money. But if you are just going for the weight, I'd rather you pass on anything sensor related.

Cody goes limp when he hears that kind of shit done to a computer bike. You'd be better off using that money on your seminal vesicle in Vegas.

I don't think a couple hundred would get me too far in Vegas but I agree. The idea might fly with the Gen2 being that it doesn't need that nut to read the speed. The Gen1 would be too complicated to bother with trying to come up with something that worked and if you did the weight loss would be minuscule.

Nope Ti aint magnetic.

* Last updated by: Rook on 2/17/2020 @ 6:32 AM *

You also have to address it galling on steel when you torque it. We use Ti all the time but the torque is a process and different than just steel fasteners. Likes to slip stick while torqueing so you could think its good buts its not close just stuck between slips in tightening.

Maybe I can send you something - have to check

We are also printing detailed Ti parts/housings for satellite mechanisms for both NASA and DoD programs. Don't know if emachine could do that or not?

Since I sold the 38ft hole in the water haven't had to throw cash at emachine shop

Too complicated. Too many "ifs." I will do this mod on my busa since the speed sensor on that bike doesn't read the countershaft sprocket nut but on the 14, I'm just sticking with OEM. Thanks though rudy.

* Last updated by: Rook on 2/18/2020 @ 4:40 PM *

That's an interesting idea. I'm sure I've seen something like that online before.

Is that a Ti nut on yours? It wouldn't work on a Gen1 being that it has a hex instead of a square.

I like what you did with your sprocket cover. I was thinking about doing some carving on mine too. I'd be going for some decorative holes but what you did will take off the most weight. One concern would be having the cover crack from the clutch pressure. That sometimes actually happens on busas with unmodified clutch covers. There are a number of companies that make slave supports for the busa just for that reason.

Custom Ti countersprocket nut from the UK, the nuts and bolts on the other side are Ti as well. The clutch pushrod is a hard anodized 7075 rod. The bolts that hold the slave cylinder on take most of the pressure, they are custom Ti as well. The thickest parts on the back side of the sprocket cover were relieved. Most of those changes would be much more difficult on a gen 1. We also lightened the clutch slave and removed unnecessary material.

* Last updated by: CoolBrzBlu on 5/31/2021 @ 7:31 PM *