Author Topic: Project "Laubfrosch" - the trials hybrid  (Read 17679 times)

0 Members and 1 Guest are viewing this topic.

AzCal Retred

  • Chennai Wrencher
  • Grease Monkey
  • ****
  • Posts: 493
  • Karma: 0
  • Laissez le bon temps rouler! Fresno, CA
Reply #135 on: August 20, 2020, 08:09:37 pm
Inspiring as always! Looks like someone needs to start selling the "kit" to the dirt riding contingent & Cafe folks! Use what you have for a pattern, maybe a nice niche market opportunity for some retiree with a nice shop & some spare time...? Certainly replaces a lot of clunky linkage. Does "Grumbern" translate as Da Vinci in German?  :)   - ACR -
A brace of 1999 Bullets: 1 Red Deluxe, 1 Green Standard. Also, 1 wee orphan 1956 Fire Arrow project.


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
Reply #136 on: August 21, 2020, 09:01:32 am
Thank you! If this was to be made as a kit, some other improvements could still (and probably should) be made. But I don't know if this would really pay off?!
Oh, actually, grumbern translates to potato ::)

Yesterday I worked on the timing cover. The welding was done some time ago, but it still needed reboring. Using a hand grinder probably wouldn't give a good result and necessity begets ingenuity. So I first removed the Multifix tool holder and set up the timing cover instead. Using a perfectly fitting pipe and metal sheets I could adjust it to the right position and clamp it down:








After that I changed the three jaw chuck to an MT adaptor and set up a boring head. I had this for a long time now and finally it came to use! ;D






Gruß,
Andreas


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
Reply #137 on: August 21, 2020, 03:44:55 pm
And while we're there we also make the bore:




And tap it. Really not a lot of meat there!



So long,
Andreas


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
« Last Edit: August 21, 2020, 04:00:31 pm by grumbern »


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
Reply #139 on: September 19, 2020, 09:53:12 pm
My filler cap has arrived! :D








Make: Bonora, Bologna :)

I also finished the second tank side panel - now both need to be matched and then it's time for the top panel 8)
So long,
Andreas


AzCal Retred

  • Chennai Wrencher
  • Grease Monkey
  • ****
  • Posts: 493
  • Karma: 0
  • Laissez le bon temps rouler! Fresno, CA
Reply #140 on: September 20, 2020, 03:22:27 pm
Now THAT's some bling, Grumbern!  :)  - ACR -
A brace of 1999 Bullets: 1 Red Deluxe, 1 Green Standard. Also, 1 wee orphan 1956 Fire Arrow project.


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
Reply #141 on: September 23, 2020, 06:15:22 pm
That's how the cap looks like on the tank by the way:




I think I'll mount it a bit further in the back, but we'll see.
For now I finished the tach-drive flange:






The angle drive shown belongs to the Interceptor and will not be mounted on this bike. Also, a tachometer is more than unnecessary on a trials machine, so the flange will be covered by a plate and only used for setting and checking the ignition timing:)
So long,
Andreas


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
Reply #142 on: September 25, 2020, 06:11:24 pm
Here you can see how I made it:

https://youtu.be/ijYjG3PfCNs


Black fingernail

  • Scooter
  • **
  • Posts: 65
  • Karma: 0
Reply #143 on: September 29, 2020, 06:34:13 pm
Grumbern, I have enjoyed following your build threads very much, but, I do have a little concern about your fuel cap.
Going off road, there is a good chance of the bike having a sudden stop, where you carry on sliding up the tank, need I say more !!!
It's metal, it doesn't understand!

Enfield 500 Deluxe 1998
Benelli 500 LS 1979
Velosolex 3500S 1968
Jaguar X type 2005
not forgetting SWMBO's Z3 2002


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
Reply #144 on: September 29, 2020, 09:31:21 pm
Haha, you're not the first to mention this ;D
Maybe I should add some armour to my pants for serious riding?! :o


Black fingernail

  • Scooter
  • **
  • Posts: 65
  • Karma: 0
Reply #145 on: September 29, 2020, 09:49:05 pm
Ha Ha, good idea, my wife was making some shish kebabs for dinner, so your cap made me wince a bit.
It's metal, it doesn't understand!

Enfield 500 Deluxe 1998
Benelli 500 LS 1979
Velosolex 3500S 1968
Jaguar X type 2005
not forgetting SWMBO's Z3 2002


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
Reply #146 on: October 06, 2020, 09:25:33 pm
This update isn't as glorious, but just as important.
Gave the worm nut a new cork seal:




And made a new magneto gear nut to fit a tachometer drive:







So long,
Andreas


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
Reply #147 on: October 18, 2020, 02:42:32 pm
Now the top of the tank is hammered and biggest part of the hammering done 8)




Next I've done the cutout for the filler neck. Attention, pofessional tooling! ;D






We're getting closer...
Andreas


Adrian II

  • Grand Gearhead
  • *****
  • Posts: 2,255
  • Karma: 0
  • Sharing my ignorance with anyone who needs it
Reply #148 on: October 19, 2020, 11:40:38 am
Again, excellent workmanship, though I do wonder, why would you need a rev-counter on a trials bike?

A.
Grumpy Brit still seeking 500 AVL Bullet perfection! Will let you know if I get anywhere near...


grumbern

  • Grease Monkey
  • ****
  • Posts: 482
  • Karma: 0
Reply #149 on: October 19, 2020, 02:27:56 pm
Absolutely true! I just did it because the works trials bikes sometimes had them and, for a bigger reason, to set up my ignition timing disk ;D
So it really is only a gimmick, just for fun ;)