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Author Topic: Project CB690 (KTM 690 engine in a CB550f frame)  (Read 20485 times)

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #140 on: Mar 01, 2019, 16:01:40 »
Massive delay caused by the machinist I mentioned earlier that made the swingarm shock mounts. I had the stem quoted on Draft A, then requoted on Draft B. I ordered Draft B, and they made and sent Draft A. Not useable, the dimensions are wrong for the final application. To their credit, they made a replacement in 1 week. But then it has been stuck in shipping for 20 days, and I can't get in contact with the courier. Now that I really have time to think about it, I should have made the stem by myself on the Colchester, and now I may actually have to. Would be fun, and save me 200 EUR. But now I'm stuck in the middle where the stem may arrive any day, so I don't want yet to order the stock, tap, drill and cutter inserts required to make it myself. I will wait a while longer. Next milestone is pressing in the stem, shortening the forks, and making it a roller.
I found a maple seed sprouting in a crack in the driveway, so I replanted it in an ashtray as a little shop buddy. I will update regularly on its progress.

Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #141 on: Mar 07, 2019, 02:24:04 »
Really enjoying this project, keep up the good work. This will be something special when it is done.

Offline goodoltup

  • Posts: 118
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Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #142 on: Mar 08, 2019, 19:23:06 »
The replacement stem arrived, after 20 days with the shipper. I brought it to my guy and had it pressed into the lower yoke, along with the spacer, bearing, and seal.

Offline goodoltup

  • Posts: 118
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Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #143 on: Mar 08, 2019, 19:26:18 »
Forks ready to be shortened. I assembled the forks with no springs, and then assembled the bike for the first time with the forks and swingarm. I set the rake to 26 degrees, and measured the forks to determine how much had to be removed from the springs. I made some top-out spring spacers out of acetal on the lathe earlier, and cut them to length to the new measurements. No pictures of any of this, unfortunately.

Offline goodoltup

  • Posts: 118
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Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #144 on: Mar 08, 2019, 19:29:36 »
Assembled steering stem. Pretty happy with this. I'll make the steering stops once the bike is on the ground with the tank on, so I can turn the bars and determine tank / fork clearance.

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #145 on: Mar 08, 2019, 19:34:39 »
Threw some paint on the frame just to cover up the bare spots. The whole bike will be disassembled after road trials and MOT for a final clean up and beautification, including frame bead blast and paint, tank and side cover paint, and new tires etc.

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #146 on: Mar 08, 2019, 19:39:13 »
This is the assembly to determine the rake. Just after this the forks were removed, shortened, and rebuilt with new seals and oil. Again, no pictures of this, but it was pretty straight forward work.

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #147 on: Mar 08, 2019, 19:42:00 »
Roller! This is most complete mock-up to date. Very, very pleased with how it looks.

Offline Popeye SXM

  • Posts: 192
  • Also used for MX
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #148 on: Mar 08, 2019, 21:15:59 »
Looking great. Any ideas what you will do for a radiator? I am building a DZR special and I will use a rad from a CR250, china special with extra thick core. For me this offers a good size, most other rads are too wide. Front wheel clearance is an issue I struggled with. Really enjoying your pics

Offline pidjones

  • Posts: 1026
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #149 on: Mar 09, 2019, 09:42:14 »
What are you doing for a front fender? Besides keeping rain and rocks out of your face, you will need one to protect whatever radiator you use.
"Love 'em all.... Let God sort 'em out!"