collapse

www.dimecitycycles.com

www.cognitomoto.com

https://www.townmoto.com/collections/vanson-leathers

www.speedmotoco.com

www.CITYLIMITMOTO.com

www.jadusmotorcycleparts.com

www.lostapostlejewelry.com

www.sparckmoto.com

www.pistonsociety.com


Author Topic: Dirtbag Oil-Boiler  (Read 9875 times)

Offline jpmobius

  • DTT BOTM WINNER
  • *
  • Posts: 1227
  • where does this go?
Re: Dirtbag Oil-Boiler
« Reply #100 on: Feb 12, 2019, 20:37:43 »
I still cant figure out why they would design it like this. Perhaps is a suspension loading thing.

Indeed.  The idea is to remove the impact of suspension motion from the brake action.  If you imagine the wheel locked by the brake, the bike not moving, and the suspension moving up and down, you will see that the contact patch of the tire actually moves back and forth very slightly.  This is because the whole assembly is rotating around the swing arm pivot.  This adds and subtracts very slightly from the action of the brake as the suspension moves, making the brake slightly more and less effective.  How important this is no doubt depends on the aptitude of the driver.  For most of us, evidently this is so minor that it need not be addressed, but for the ultra skilled, getting out that last little bit of performance likely is of some use.  Although the value of the back brake certainly is quite small when you unload the back of the bike when braking hard, that same unloading makes controlling whether the wheel locks or not a very sensitive process, so adding that little refinement may be of use to some riders.
Mobius


On a long enough timeline, the survival rate for everyone drops to zero.

1973 RD350 Yamaha build  http://www.dotheton.com/forum/index.php?topic=66498.0

Offline doc_rot

  • DTT BOTM WINNER
  • *
  • DTT SUPPORTER
  • *
  • Posts: 1256
  • Oh the usual... I bowl, I drive around...
Re: Dirtbag Oil-Boiler
« Reply #101 on: Feb 14, 2019, 07:06:20 »
I cut some K&N filters down and needed a new endcap. I had wanted to try this process for a while to see if it would work with wood. Drew some parts up and routed a die. I used .040" 3003 which I annealed. First attempt was with douglas fir and it was too soft so it didn't give it very good definition, plus i didn't  leave enough gap to allow for the metal to buckle around the perimeter. Chopped off the extra and pressed them again this time with a die made from oak. You can see the difference in the side by side photo. came out great and cost me almost nothing to make. I will definitely be using this process in the future!
« Last Edit: Feb 14, 2019, 07:08:26 by doc_rot »

Offline pidjones

  • Posts: 793
Re: Dirtbag Oil-Boiler
« Reply #102 on: Feb 14, 2019, 07:15:00 »
Looks great, but you need your logo in the next one. How did you trim it?
"Love 'em all.... Let God sort 'em out!"

Offline irk miller

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 8694
  • You've been mostly-dead all day.
Re: Dirtbag Oil-Boiler
« Reply #103 on: Feb 14, 2019, 08:02:20 »
I'm totally doing this to make a box for my chopper.

Offline stroker crazy

  • DTT SUPPORTER
  • *
  • Posts: 4392
  • crazy as a fox
Re: Dirtbag Oil-Boiler
« Reply #104 on: Feb 14, 2019, 08:12:34 »
Nifty!
“Ride like the Wind” W.H.

Offline advCo

  • DTT BOTM WINNER
  • *
  • Posts: 3011
  • Nick Ol' Eye
    • adventur Studios
Re: Dirtbag Oil-Boiler
« Reply #105 on: Feb 14, 2019, 09:10:04 »
Very cool. I'd been playing around with this same method to make some parts for the Bus project. I 3D printed a stamping die but even on full fill the PLA wasnt dense enough for a small stamped area.

Offline jordandogtown

  • Posts: 165
  • Washed up Weekend Warrior
Re: Dirtbag Oil-Boiler
« Reply #106 on: Feb 14, 2019, 09:28:14 »
Genius. Looks OEM (or better) too
"A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils, and lunatics" George Fitch, 1916

1979 CB750F Tracker (maybe?)

Instagram

1979 CB750F Part Out

Offline Maritime

  • DTT SUPPORTER
  • *
  • Posts: 9663
Re: Dirtbag Oil-Boiler
« Reply #107 on: Feb 14, 2019, 09:33:20 »
Very cool. I'd been playing around with this same method to make some parts for the Bus project. I 3D printed a stamping die but even on full fill the PLA wasnt dense enough for a small stamped area.

Would ABS be stronger?
The GL Rebirth: http://www.dotheton.com/forum/index.php?topic=68337.0
CX500 Low budget Bobber : http://www.dotheton.com/forum/index.php?topic=43617.0
"Beer makes you feel the way you ought to feel without beer" -Henry Lawson
"Beer is proof that God loves us and wants us to be happy." - Thomas Jefferson

Offline irk miller

  • DTT SUPPORTER
  • *
  • DTT BOTM WINNER
  • *
  • Posts: 8694
  • You've been mostly-dead all day.
Re: Dirtbag Oil-Boiler
« Reply #108 on: Feb 14, 2019, 09:35:56 »
Would ABS be stronger?
Stronger, but flexible.  Strength isn't the issue. Hardness is.

Offline advCo

  • DTT BOTM WINNER
  • *
  • Posts: 3011
  • Nick Ol' Eye
    • adventur Studios
Re: Dirtbag Oil-Boiler
« Reply #109 on: Feb 14, 2019, 09:41:34 »
Stronger, but flexible.  Strength isn't the issue. Hardness is.

Yep, it was a simple enough shape I could carve it out of oak no problem. I was also just using my bench vise to press it, which didn't really have enough force either.