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Thread: Leading vs Trailing front axle

  1. #1
    Join Date
    Sep 2005
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    Lipetsk, Russia
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    Leading vs Trailing front axle

    What are the differences between the two? Just wondering about the theory on this stuff.
    I'm back in the USSR...

  2. #2
    Join Date
    Sep 2002
    Location
    New Hampshire
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    794
    With a trailing axle, you will have a bit more stability especially at higher speeds. You wont have to fight the bars as much to get out of single tracks and overall, its simply a better setup. Much easier to handle as far as a performance aspect.

    However, a leading axle has its benefits as well..The bike will turn sharper for one thing, but lose stability at speed and your more prone to follow the ruts your in. It does give a touch more wheelbase and depending on what your doing that small increase can make a difference in certain hillclimbs.

    All in all, the general concencus amongst most trikers is that the trailing front axle is far superior.

  3. #3
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    All right, thanks! I'm just wondering what setup to use in my ATC70 front suspension fork.
    I'm back in the USSR...

  4. #4
    Join Date
    Sep 2002
    Location
    New Hampshire
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    794
    Its hard to explain, so its best left to rider experience. Motocross bikes all tend to have leading axles. Different animal, but just goes to show you, no one setup is the be all end all.

    Try to get some seat time on similar machines with leading/trailing designs.

  5. #5
    Join Date
    Sep 2004
    Location
    Lancaster, PA
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    Heres is a pick of my ATC70 front suspension project, I went with leading for length and coolness factor. lol They are XR 80 forks, I am almost mone with this projecyt then I can tear it down for paint.
    Attached Thumbnails Attached Thumbnails DSC01603.JPG   DSC01602.JPG   DSC01598.JPG  

    1985 Tiger 250LC
    1985 Tiger 200LC

    1985 ATC 350X
    1985 ATC 200x
    1973 ATC 70 (resto project)
    ATC 70 Full A+ Suspension Mini Tiger
    and many more!!!
    1991 District-6 Open 4 Wheel 4-Stroke Expert Hare Scramble Champ

    Blue Line Graphics
    Custom and Reproduction Decals
    http://www.bluelinedecals.com/

  6. #6
    Join Date
    Nov 2003
    Location
    Newfoundland
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    5,280
    Cool 70! Dig the shorty front fender.

    What design, leading vs trailing is best for jumping?

  7. #7
    Join Date
    Sep 2005
    Location
    Lipetsk, Russia
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    Quote Originally Posted by blue27 View Post
    Heres is a pick of my ATC70 front suspension project, I went with leading for length and coolness factor. lol They are XR 80 forks, I am almost mone with this projecyt then I can tear it down for paint.
    Are XR and XL 80 forks the same? If so, we've got similar ideas! I have a set of XL80 forks to use on my Sus-70 project.
    I'm back in the USSR...

  8. #8
    Join Date
    Sep 2004
    Location
    Lancaster, PA
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    I am not sure, but originally the A+ frrames had XR75 forks and the axle mounted on the bottom. Here is a pic of my A+ when I got it and a pic off the one I had with just the A+ front forks. Both were XR 75, but I have switched to the XR 80 forks because of the leading axle look. On the one with the blue seat I installed a Lifan 110 Manual Clutch Electric start motor and rebuilt the forks with a 3/4 inch spacer on top of the spring and 20w oil for us "larger than intended riders" lol
    Attached Thumbnails Attached Thumbnails DSC01545.JPG   DSC01548.JPG   DSC01565.JPG   DSC01549.JPG  

    1985 Tiger 250LC
    1985 Tiger 200LC

    1985 ATC 350X
    1985 ATC 200x
    1973 ATC 70 (resto project)
    ATC 70 Full A+ Suspension Mini Tiger
    and many more!!!
    1991 District-6 Open 4 Wheel 4-Stroke Expert Hare Scramble Champ

    Blue Line Graphics
    Custom and Reproduction Decals
    http://www.bluelinedecals.com/

  9. #9
    Join Date
    Sep 2005
    Location
    Lipetsk, Russia
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    2,824
    Quote Originally Posted by blue27 View Post
    rebuilt the forks with a 3/4 inch spacer on top of the spring and 20w oil for us "larger than intended riders" lol
    Ahh, right on brother. Did you have to make custom triple clamps, or did the XR 80 forks fit into the XL75 clamps on the A+ rolling chassis?
    I'm back in the USSR...

  10. #10
    Join Date
    Sep 2004
    Location
    Lancaster, PA
    --
    1,738
    The XR80 forks are the same size as the 75 forks so they fit right into the A+ triple clamps. The Triple clamps were made by A+ and came with the frame.

    1985 Tiger 250LC
    1985 Tiger 200LC

    1985 ATC 350X
    1985 ATC 200x
    1973 ATC 70 (resto project)
    ATC 70 Full A+ Suspension Mini Tiger
    and many more!!!
    1991 District-6 Open 4 Wheel 4-Stroke Expert Hare Scramble Champ

    Blue Line Graphics
    Custom and Reproduction Decals
    http://www.bluelinedecals.com/

  11. #11
    Join Date
    Sep 2005
    Location
    Lipetsk, Russia
    --
    2,824
    Ahh! I gotcha. I will probably have to make custom clamps for mine.
    I'm back in the USSR...

  12. #12
    Join Date
    Sep 2004
    Location
    Lancaster, PA
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    1,738
    Yeah if dont have anything now. I have looked at a couple of different ideas from cutting a set of XR tripples and adding in a piece to make them wider to trying some off a 200x. Nothing is a bolt up. I might be welding in a head tube from a 200x frame on a stock 70 frame if the guy finds a set of forks to use (200x way to long and a 33mm the xr's are 27 mm). If you want I can send some pics and measurements to you of the A+ triples. The next time I take it off I will snap some pics.

    1985 Tiger 250LC
    1985 Tiger 200LC

    1985 ATC 350X
    1985 ATC 200x
    1973 ATC 70 (resto project)
    ATC 70 Full A+ Suspension Mini Tiger
    and many more!!!
    1991 District-6 Open 4 Wheel 4-Stroke Expert Hare Scramble Champ

    Blue Line Graphics
    Custom and Reproduction Decals
    http://www.bluelinedecals.com/

  13. #13
    Join Date
    Sep 2005
    Location
    Lipetsk, Russia
    --
    2,824
    Jeez, I've heard of people custom making 200X triples and forks fit on the ATC110 chassis, but even then they had to lower the forks about 2 inches to get the ride height dialed in. Actually, you should look to see if KTM 80SХ (might have been 85 or 70 or something like that) will fit in the 200X triples. I've heard that those forks are perfect for the "full-suspension" 70's.
    I'm back in the USSR...

  14. #14
    Join Date
    Nov 2003
    Location
    Newfoundland
    --
    5,280
    Any progress on your project Blue27?
    My Feedback 85 TECATE 500 08 Honda 450R

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