[chrisbertaut]

^Stress concentration nightmare^

 

[Mercury Kid]

^Hence the words "Progress Shot". I haven't done any cleanup on the brake yet, and the cover is only about 50% done. I'm just giving everybody an idea of the method, and how much weight it actually saves.

I drilled them on a drill press, but doing it by hand would work as well. I got tired of filing so I'm going to pick up a carbide burr for the die grinder to speed things up a bit. And then do final cleanup with some files.

 

[overdraft]

i don't think you can beat the 'jimi' lightening move if you want to save weight on your sprocket cover...

 

[Mercury Kid]

That is so badass!

 

[joe c]

ok, thats cool as shit. i want jules winnfield, (samual l jackson) from pulp fiction.

"its the one that says bad mutha fucker on it"

 

[Swagger]

HAHAHAHA! I want Johnny Cash sending his message!

 

[Mercury Kid]

Can I get Hunter S. Thompson sipping some scotch and smoking a cigar on mine?

 

[chrisbertaut]

I am interested to see how much weight you save for all that work, but on the other hand I really think this bike could be unsafe man... be careful not to drill too much from parts under stress (or any at all if you can help it).

 

[Mercury Kid]

It wasn't much work at all. About 2hrs total of drilling and grinding and filing. I took some more out of the sprocket cover, and a bit off the generator cover. I'll post pics when I get them installed. 5.7 ounces saved on the covers alone. Another 4.5 on the brake. Almost a pound of superfluous aluminum scrapped so far.

And looking damn good doing it.

 

[Mercury Kid]

It wasn't much work at all. About 2hrs total of drilling and grinding and filing. I took some more out of the sprocket cover, and a bit off the generator cover. I'll post pics when I get them installed. 5.7 ounces saved on the covers alone. Another 4.5 on the brake. Almost a pound of superfluous aluminum scrapped so far.

And looking damn good doing it.

 

[crazypj]

quote:Originally posted by unit



crazypj those look great, would you mind showing the inside of the hub im interested in seeing how you fitted the mesh.

I glued it in with JB Weld.
Says it will take a temp of 400+f and I know its been used in intake ports without problems. I dont expect brake brum to get that hot (if it does I'll probably have more serious problems )
I have some major plans for rear hub, will post pics when I manage to get it done (physical therapy 3 times a week takes up too much time)

PJ

 

[crazypj]

quote:Originally posted by unit



crazypj those look great, would you mind showing the inside of the hub im interested in seeing how you fitted the mesh.

I glued it in with JB Weld.
Says it will take a temp of 400+f and I know its been used in intake ports without problems. I dont expect brake brum to get that hot (if it does I'll probably have more serious problems )
I have some major plans for rear hub, will post pics when I manage to get it done (physical therapy 3 times a week takes up too much time)

PJ

 

[unit]

cheers crazypj i've never used JB weld so i'll look into it.

 

[unit]

cheers crazypj i've never used JB weld so i'll look into it.

 

[busapilot]

Now I want a sprocket cover with Pam Anderson, Barbie Benton, or any Russ Meyer actress.

 

[busapilot]

Now I want a sprocket cover with Pam Anderson, Barbie Benton, or any Russ Meyer actress.

 

[crazypj]

Finally got round to going nuts on rear hub.
Its off CB360 but close enough to same as CB350 one
As far as I know the weak spot is the circlip groove holding sprocket on.
I have made bearing retainer mods to hold sprockets in the past (and helicoiled the drive stud holes and bolted sprockets on)
There are almost full length webs running from rear of cush drive rubber housings so I think it will be OK
Bought a couple of spares off eBay in case its weakened too much.
(It's been done to look 'cool' not practical)

 

[unit]

again looks great crazy... any idea on how much wait you saved?

also can anyone confirm that saving 1 pound of rotational weight is the equalivant to 15 pounds of non-rotational weight? i remember reading it somewhere.

 

[crazypj]

weight saving?
Bugger all by the time I drilled and tapped holes then fitted perforated shields. maybe a few ounces at best (mostly from the holes around outside rim)
Whichever way you look at it, its a damn heavy hub
On the other hand, the brake plate is even more carved up, pretty much all that's left is the ribs.
No pics of that yet though, still needs a lot of work. It will be getting mesh same as front hub

PJ

 

[Geeto67]

all that work just to let dirt and water into your drum....tsk tsk.