Another Removable Swingarm Extension Concept
Close
    
    
Page 1 of 2 12 LastLast
Results 1 to 10 of 19
Like Tree42Likes

Thread: Another Removable Swingarm Extension Concept

  1. #1
    Senior Member JerseyJeeper's Avatar
    Join Date
    Mar 2011
    Location
    NJ Shore / Pine Barrens
    Posts
    2,271

    Another Removable Swingarm Extension Concept

    This uses 5/16 steel plate.

    Yamaha xt500 old style adjusters or stock snail adjusters.

    The backing plate is optional for extreme riding.

    Very easy to make, no axle width issues... same as stock +/- a tad

    i'm posting 15 pics so hold up on comments till #15 is posted please

    stock.JPG

    ajuster.JPG

    1.JPG

    2.JPG

    3.JPG
    TW-Brian, Ken and PlacerLode like this.

  2. #2
    Senior Member JerseyJeeper's Avatar
    Join Date
    Mar 2011
    Location
    NJ Shore / Pine Barrens
    Posts
    2,271
    TW-Brian and Ken like this.

  3. #3
    Senior Member JerseyJeeper's Avatar
    Join Date
    Mar 2011
    Location
    NJ Shore / Pine Barrens
    Posts
    2,271
    TW-Brian likes this.

  4. Remove Advertisements
    TW200Forum.com
    Advertisements
     

  5. #4
    Senior Member JerseyJeeper's Avatar
    Join Date
    Mar 2011
    Location
    NJ Shore / Pine Barrens
    Posts
    2,271
    TW-Brian, Ken and grewen like this.

  6. #5
    Senior Member JerseyJeeper's Avatar
    Join Date
    Mar 2011
    Location
    NJ Shore / Pine Barrens
    Posts
    2,271
    Done.. I might build this one.

  7. #6
    Senior Member TW-Brian's Avatar
    Join Date
    Dec 2010
    Location
    Pleasanton, CA
    Posts
    4,366
    Jeeper,

    Your ideas keep getting better and better!

    Brian
    JerseyJeeper, Ken and Tweaker like this.
    site:tw200forum.com

  8. #7
    Senior Member JerseyJeeper's Avatar
    Join Date
    Mar 2011
    Location
    NJ Shore / Pine Barrens
    Posts
    2,271
    Thanks Brian!

    I don't know why but sometimes keeping something "simple" and as least complicated as possible is difficult. Overthinking can get the best of you sometimes.

    Quote Originally Posted by TW-Brian View Post
    Jeeper,

    Your ideas keep getting better and better!

    Brian
    Ken likes this.

  9. #8
    Senior Member JerseyJeeper's Avatar
    Join Date
    Mar 2011
    Location
    NJ Shore / Pine Barrens
    Posts
    2,271
    I wish I had a plasma table or a water jet. This would be easy and quick to produce.
    Dryden-Tdub, Ken and TW-Brian like this.

  10. #9
    Senior Member Fred's Avatar
    Join Date
    Dec 2011
    Location
    Turtle Wrangling the Sierras
    Posts
    12,788
    Very nice concept. However...
    There will be some serious bending moments around the bolts depicted for assembly. While you can get bolts with good shear strength the mild steel they pass through might deform into the open slot ways. I would suggest welding the three pieces into one monolithic assembly for off-road durability.
    PlacerLode likes this.
    Active Thumpers:
    2003 TW200 "Betty Boop"
    2006 TW200 "Mr.Gizmo”
    Neglected 2-Smoker Hanger Queens:
    1981 KDX175 Enduro
    1982 YZ250G MX
    Hidden Content

  11. #10
    Senior Member JerseyJeeper's Avatar
    Join Date
    Mar 2011
    Location
    NJ Shore / Pine Barrens
    Posts
    2,271
    Quote Originally Posted by Fred View Post
    Very nice concept. However...
    There will be some serious bending moments around the bolts depicted for assembly. While you can get bolts with good shear strength the mild steel they pass through might deform into the open slot ways. I would suggest welding the three pieces into one monolithic assembly for off-road durability.
    Hi Fred, I appreciate the input but I disagree. I have been doing these types of things for many years. I'm sure you have to but let me explain. We can agree to disagree i'm sure so please take no offense as I try to explain the concept. Hopefully i'll win you over if not you can borrow my welder

    There is no shear effect, or close to zero.. The upper and lower flanges stop all movement up and down of the entire assembly, in addition the flanges from the stock swing-arm go into tight slots, - they as well stop all vertical movement, the assembly can not move forward as it's blocked by the end of the slots and the end of the recess in the stock swing-arm. The TW does not have reverse so rear movement is not an issue unless your being pulled out by the back wheel but the frame would crack before those bolts (look up some shear values for common bolts). The two main plates are shown as welded anyway (whitish beads in drawing). The third backing plate is actually optional for extreme lateral forces and will not be needed in my calculations ever. If there where high shear forces we would have grooved axles and snails. The friction of the plates at their opposing surface areas at proper torque almost reduces the shear (if there where any) to zero anyway. Meaning that, calculated without the slots, flanges, and the end of swing-arm recess stopping forward movement the friction of the plates under the torque of the bolts is enough to hold firm. Considering that the two bolts are in the end of the slots there movement is contained as well. If anything is going to move it would be the axle in it's slot. That's the same risk we deal with today with little to no issues if properly torqued. So an accident waiting to happen? Sure they can be welded but the plan was for it to be removable. If it was welded one plate would be enough.

    I hope you see how shear is contained and the bolts play little to no part in vertical or forward movement.
    Last edited by JerseyJeeper; 03-15-2017 at 10:11 AM.
    grewen, TW-Brian and Tweaker like this.

Page 1 of 2 12 LastLast

Sponosred Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. Swingarm Extension - Removeable
    By JerseyJeeper in forum Performance and Customization
    Replies: 25
    Last Post: 03-10-2017, 05:01 AM
  2. Swingarm Extension - Removeable
    By JerseyJeeper in forum Technical Help
    Replies: 15
    Last Post: 03-09-2017, 02:00 PM
  3. Swingarm extension
    By TWGIRL in forum TW200 Classifieds
    Replies: 3
    Last Post: 08-24-2014, 08:01 PM
  4. Swingarm extension pieces.
    By Trikstr in forum Performance and Customization
    Replies: 56
    Last Post: 05-23-2014, 05:50 PM