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Author Topic: Project CB690 (KTM 690 engine in a CB550f frame)  (Read 20433 times)

Offline cb360j

  • Posts: 366
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #110 on: Jan 18, 2019, 08:11:50 »
Only 200 eur is a steal deal! Everywhere near me wants to try and charge $700-$1000 usd for one, or two off prototypes.

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #111 on: Jan 19, 2019, 03:51:07 »
Pete12, I REALLY enjoyed your thread on the CB450, I will give it a good read through and see if there are some things that you did that I may try on my machine. Cheers!

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #112 on: Jan 19, 2019, 03:54:30 »
CB360j, I completely agree, the machinists I use for my job would normally charge about 800 for ANYTHING, just to get the machine setup. This company Shift.BZ is network of machinists that bid on jobs when they have spare capacity, so the prices can be lower. The parts don't come with an inspection report or materials certificate, as I would normally expect, but the parts were of very high quality and measured up fine.

Offline Pete12

  • Posts: 362
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #113 on: Jan 30, 2019, 09:42:25 »
Pete12, I REALLY enjoyed your thread on the CB450, I will give it a good read through and see if there are some things that you did that I may try on my machine. Cheers!

Thanks goodoltup, but you are doing a great job on your bike, I doubt you'll need anything from me.

Offline jordandogtown

  • Posts: 191
  • Washed up Weekend Warrior
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #114 on: Jan 30, 2019, 16:21:57 »
I love seeing such an ambitious idea come to life. Nice work man. I'll definitely be following along
"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?)

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1979 CB750F Part Out

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #115 on: Jan 31, 2019, 16:28:19 »
Lots of progress has been made, but few updates. Big day! I brought the frame to be welded professionally by a frame builder. He put it on his jig and found that it was tacked up pretty square, which pleased me. All bits that I tacked were welded up properly, including the frame side plates, swingarm pivots, lower engine mounts, top shock mounts, etc. The aluminium lower shock mounts were also welded.

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #116 on: Jan 31, 2019, 16:37:46 »
I quickly made a better work table out of some scrap. It took about an hour to build, and it's pretty stout. I will likely disassemble and dispose of it after the build, so I didn't spend a ton of effort on it. But it did come out pretty nice. I got a wheel chock so when the time comes to take it off the jig (it's back on the jig temporarily after welding just to hold it) I will have a way to secure it. I will probably put it on the centre stand with the wheel chock during the rest of the build.

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #117 on: Jan 31, 2019, 16:39:24 »
Some closeups of the welding work.

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #118 on: Jan 31, 2019, 16:46:42 »
There was some interference with the brake torque arm, so I milled off the ledge on the arm with the Haas at work. It's tough to explain, I should have taken some before pictures. There was a ledge, or overhang, on the torque arm who's purpose appeared to be to keep the arm attached to the swingarm during wheel installation. With it gone it might be more fiddly to get the wheel on, but I don't think that's a huge problem.

Offline goodoltup

  • Posts: 118
    • Personal and Work Website
Re: Project CB690 (KTM 690 engine in a CB550f frame)
« Reply #119 on: Jan 31, 2019, 16:48:54 »
Made some radiator supports on the Colchester. These bits will be welded together, and the tube will be welded to the frame when it's time to mock up the radiator. May not use these for a while, just had some extra time on the lathe after work.