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  1. Blackjacks

    London Colleges

    "Motorcycle engineering" isn't the same as the motorcycle mechanics city and guilds which is what I believe Merton does. Try googling for city and guilds courses in London. Swansea Institute of Higher Education has a Motorcycle engineering degree course.
  2. Blackjacks

    Motorcycle steering

    Evelrod, You live in OZ? Well you probably don't see that many choppers because of the reggo rules you have over there... Friend of mine builds them in Sydney and from what he's told me, getting them through the engineers inspection is a bit of a mightmare.
  3. Blackjacks

    Contra-rotating brake rotors

    Hmmm... Only bikes I've ever seen with brakes on the the drive sprocket, were Fred Kodlin's friction drive V-Rod and Mike Puglisi's (I think) biker build off friction drive bike. Since you've got a reduction on the final drive, the brake disc has to spin faster than the wheel, and because you...
  4. Blackjacks

    Contra-rotating brake rotors

    Any suspension design is based on a model. How accurate that model is depends on how closely the results you get from applying it. These models are constantly evolving, which is why you constantly see developments in chssis and suspension design. So, reading the site it seems to me that the...
  5. Blackjacks

    Tubing bender

    here's a link to the tube bender article... http://www.thefont.pwp.blueyonder.co.uk/bikes/tube_bender.htm Outlines the basic principles.
  6. Blackjacks

    Tech resource.

    I've got some tech articles posted on my site. It covers building a rigid frame for a Jap four, "compound" bending, wiring, and a couple of other subjects. http://www.thefont.pwp.blueyonder.co.uk/bikes/index.htm should get you there.
  7. Blackjacks

    Tubing bender

    If you can get 100% Biker mag (mostly available in the UK) where you live you want issue no. 67. There's an article in there on building your own bender that works for up to 1 1/4" tube. I was really impressed with it, and I wrote the article. If you can't get hold of the mag then in a couple...
  8. Blackjacks

    Need standard frame specs for a Harley(1975-03)

    Here's a link to the motor mount dimensions, http://64.172.168.34/neatstuff/motor-trans-mount.htm But for the most part it is loads easier to beg, borrow, or whatever it takes, a Softail frame and build a jig off of that with the adjustability you need built into the jig. If you have a local...
  9. Blackjacks

    "Negative Steering" Please explain.

    Definitely not a gryoscopic effect, try it on a sports bike with a 16" front wheel (less flywheel effect,right?) and a scooter with 10" wheels. Anybody mention that you can "pick" the bike up out of a bend by applying a turning force into the bend? If it was a gyroscopic...
  10. Blackjacks

    Gearbox modifications.

    The Hodaka set up you refer to was a Sachs design (Zundapp used Sachs engines). I had a Sachs 50 in a Casal moped. All I can say is I hope Hodaka did a better job of it. The biggest problem with moving neutral to the bottom of the box is that 1st to neutral is half a shift. So you would not...
  11. Blackjacks

    H-D and SYN3

    Evelrod, If your son has an Evo motor in his Harley then it shouldn't leak oil. If its earlier than that then it will stop leaking when it runs out of oil. The basic point about synthetics in HDs was that they are primarily roller bearing engines and require a "stickier" oil than a...
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