Busa top yoke
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Thread: Busa top yoke

  1. #1

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    Busa top yoke

    Hello to all.
    I have been working on a top hat design for the busa conversion. Drawings and mock ups are done. Next step is to get the drawings converted over and a couple of them machined. Is there anyone intrested in helping out with the cad and machine work via cnc or conventional milling ?
    Jetfire and FW190 like this.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

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  3. #2

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    Re: Busa top yoke


  4. #3

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    Re: Busa top yoke

    Few pics of the mockup. It uses the stock Blackbird bearings, seals and castle nuts. The stock Busa spindle and top nut but it's turned down at the bearing and locknut area for the BB pieces. The top hat can use the stock Busa bar cap with helibar's. Clipons or a regular motorcycle handle bar setup using bolt on saddles.

    IMG_0556.JPGIMG_0528.JPGIMG_0525.JPGIMG_0527.JPGIMG_0526.JPG
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

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  6. #4
    Supercharged Mod
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    Re: Busa top yoke

    Well that's coming on.
    Are you aiming to take down the area around the ignition key to give easier access but still maintain the steering lock?
    BTW you are so lucky not to have HISS I had great 'fun' making up a piece to hold that correctly when I did my Kwak conversions.

    Just looking at the lower yoke am I correct in assuming that the lock stops will need changing? If you do, I found it very useful to drill the new ones off centre so that you could rotate them into exactly the correct position ..... effectively a pair of cams.
    Full of Hot air? Intercool yourself............ you know it makes sense

  7. #5

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    Re: Busa top yoke

    It actually clears the key engaging the locks with the cut down shown in the first pic. The locking bolt engages perfectly in the stock frame points. We are looking at changing out the inner panel panel plastic pop pins for shoulder bolts. The heads actually line up on the fork tubes and match the BB's original stop points to a tee.
    TheDuck and Jetfire like this.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  8. #6

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    Re: Busa top yoke

    Ok wanted to give an update. Sending drawings and mockup out to quote in the next week. I settled on drilling the hat for a busa cap. I have found bolt on stanchions that will allow standard bar to bolt into the busa mounting points as well. So this hat has the option of a standard bike bar, busa top hat or clipons. If you don't use the first 2 options then you'll have mounting holes for a camera or phone or gps. Or there will be blind plugs in the holes instead. If anyone is interested in pne of these let me know.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  9. #7

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    Re: Busa top yoke

    I hope no one to finds this as demeaning or condescending, but why? Why would I think of doing such a task? Is there a weakness to overcome this doing these mods? (Devil's advocate)
    Last edited by Aphrodite; 02-19-2016 at 7:47 PM. Reason: stupid auto spelling thing on android.
    You do not need a therapist if you own a motorcycle, any kind of motorcycle. ~Dan Aykroyd

  10. #8

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    Re: Busa top yoke

    Quote Originally Posted by Aphrodite View Post
    I hope no one to finds this as demeaning or condensending, but why? Why would I think of dong such a task? Is there a weakness to overcome this doing these mods? (Devil's advocate)
    None at all Aphrodite.
    1. Fully externally adjustable compression, rebound and preload
    2. Newer generation improved fork design
    3. Greatly increased rigidity 50mm versus 43mm
    4. About 15 pound weight reduction a good part of it moved from the sprung (active components) mass. Resulting in a much better reaction to road surface (tire stays planted much better).
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  11. #9

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    Re: Busa top yoke

    The BB forks are a little on the dinosaur side. They are fine on a GL but a nice modern adjustable USD fork is a sweet upgrade for the Bird.

    ed; ya what he^ said
    Ride hard, Old age sucks

  12. #10

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    Re: Busa top yoke

    i run a ganmar spacer on my busa gen 2[i had it machined to 17mm or so iirc] plus helibars to make it comfy
    you have to put the key down into the ignition lock with the spacer-its no biggie as the busa has a fairly long key

    biggest difference between the busa and bird for me was the soft front end of the bird,and i dont ride that fast really-but probably brake late and hard compared to some

    keep up the good work

  13. #11

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    Re: Busa top yoke

    My oldest son is going to run the gen 1 front with the stock Busa hat and heli's. He likes to be leaned forward a little bit. The ignition locks no problem for him. He's building an rfid security system to enable and light the bike. It will have a quarter sized disc with a tether. It locks into a receiver located in the hole that was occupied by the previous Busa tumbler. It has a 6 foot proximity that initializes when it senses the chip. Then you have to insert the disc and hit the starter switch and the bike fires up. All of the bikes power is routed through the control box. So the only way to move the bike with out the chip is to push it away. Then you'll have to strip the wire harness and replace it to get the bike running.
    Last edited by beestoys; 02-19-2016 at 11:47 PM.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  14. #12

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    Re: Busa top yoke

    Picking up 7075 billets Friday.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  15. #13
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    Re: Busa top yoke

    Quote Originally Posted by beestoys View Post
    Picking up 7075 billets Friday.
    top quality stuff then! Any reason you are going that route rather than say 6061T6 ... thinking machinability and stress corrosion cracking.
    Full of Hot air? Intercool yourself............ you know it makes sense

  16. #14

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    Re: Busa top yoke

    Discussed the benefits of either with the machinist who has a large number if years and experience. Understanding the corrosion properties were also a factor and weld ability as well as forming characteristics. We came to the conclusion for strength that it would be the best. I plan to either powder coat or clear coat the part when I am done and beings I am in a desert climate corrosion isn't to much of an issue. Machine ability isn't an issue for him either.
    TheDuck likes this.
    Route 191 formerly Route 666 Some say that this section of the
    road has 1100 curves in 95 miles.

  17. #15

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    Re: Busa top yoke

    On ebay there's a cb1300 billet thug yoke, if you haven't seen it all ready. Could not get it to link, but you should be able to find it


 
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