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  1. Streetfighterkz

    Junk sportbike tank or at least filler area wanted.

    No longer looking. Found a cheap one on eBay. Later, Doug
  2. Streetfighterkz

    '83 GPz750 Resto-Mod (pic heavy)

    Found a cool billet goodie from a place in South Africa called ACC Billet. I’ll be using this as a donor for the filler area as the billet piece is designed for a Slingshot tank. I’ve been wanting a single seat and tail piece for a few years now. I found this on eBay UK and the...
  3. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    I’ve been looking for a decently priced Zx6 fender. But there was only a three year production run, so just finding a fender is a little hard. Again, I rummaged through my spares and found a cut-up early Cbr900RR fender. I sat it on the tire and I think it’ll look fine, but will need a set of...
  4. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Started digging around for more geometry information. Found a small nugget on AC Sanctuary’s website and another small piece of the puzzle on KzRider. These specs apply to the Z1/Kz900/1000 but the Kz650 is of similar design and geometry so maybe the same is applicable. I put my shocks in the...
  5. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Hung the shocks to looks at angle, lower mount locations… And an obligatory 3/4 view. Last thing was to check rake, trail, swingarm angle and wheelbase. With a 23.1° rake and the Zx6R’s offset, trail is around 95mm. The Zr7 arm is almost 2.5” longer than the Kz’s. This means the WB is 57”...
  6. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Warning…LONG 2-part post ahead. Pulled the old swingarm out. Surprisingly, the pivot bolt slid out very easily. Just as I found on the web, the stock Kz pivot width is 229mm.. Knowing that I need to remove about 7.5mm per side, I cut about a 5-6mm sliver off of each side. This dimension...
  7. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Did you ream out the holes or just carefully drill them? I found the stock pivot bolt from my Gpz750. It’s 17mm but about 10mm longer. I remember replacing it with a hollow Triumph part. I’ll need to dig back through my records and see what it came from. Later, Doug
  8. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    I figured since my wheels and calipers already rule me out of AHRMA, my component selection doesn’t matter much anymore. To be honest, I’ll be lucky to make it to a couple track days a year..let alone run a full-on race even if WERA allows me in. Later, Doug
  9. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Right now, I’m using the stock 16mm bolt. I machined another mockup bearing for the left side. The right side of the pivot is just slipped over frame boss. I’m still working out the details needed for the final design. I scored those used Galfer rotors on eBay for $75/shipped. Sometimes it...
  10. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Knocking down the frontend to-do list. Front fender, gauge mounts, steering stop, brake lines, and headlight mount remain, yet. Since the front end is sorted enough to roll the bike, I spun it around so the swingarm swap can be tackled. My biggest hurdle will be the swingarm pivot...
  11. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    I rolled the 650 backwards onto my lift and started disassembling the front end. It took me about 30mins plus another 10 to knock the old bearing races out. I made some mockup steering bearings using some Delrin. It’s not cheap but easier and quicker to machine than aluminum. Next up...
  12. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    I cleaned up the rotor side of the rear wheel. Started with a buffing pad in a hand drill. It was the wrong item for the job so I finished cleaning and polishing it by hand. 40mins later and it’s not perfect but definitely more presentable. I had a Driven 220mm wave rotor left over that I’ll...
  13. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    On to the lower triple. The Zx6r clamp is a bit thicker than the 6E clamp. This means that the stem needs to be pushed further through the R’s triple to have the same bearing journal exposed. In this scenario that means the R’s triple needs bored 3.5mm deeper. I finally ordered a boring head...
  14. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    I should have been doing other tasks in the garage but couldn’t help it as I’ve not machined anything in a bit. I was having chip withdrawal. I machined my top clamp to remove the ignition switch lugs and add holes in for my bar risers. Later, Doug
  15. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Why so? I have had several Kz’s and not had problems with the stock non-electronic setups. Later, Doug
  16. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Let’s see if the link works…. I cleaned and gapped the points, removed the carbs and sprayed some starting fluid in the intake ports and…it lives! I also filled out all the forms and sent a check to the Vermont DMV yesterday. I’m trying to use their system to register it for street use...
  17. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    I received in the matching lock set yesterday and installed both the ignition switch and the seat lock. I got the steering lock and gas cap too. The old Kz caps don’t have tumblers so any key will open them. I guess I have a spare now. I may swap out the steering lock. I will need to machine a...
  18. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Right. I read the rules for AHRMA and WERA. PM wheels as well as any brake caliper having more than 2 pistons are not allowed in AHRMA.. The ‘95-95 Zx6R forks are RWU meaning that with a rim and caliper swap, I might fit in. Later, Doug
  19. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    After more thought, a simple stem swap from the Zx to the Kz stem isn’t going to work as well as I hoped. The Kz’s stem is the same 28mm diameter through the triple clamp but increases to 30mm above. This means I can not push it up through the triple to install it. I thought about turning the...
  20. Streetfighterkz

    ‘79 Kz650B - Semi-Trackbike Build

    Thanks Doc. I forgot about the drop there. Later, Doug
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