front end issue
Page 1 of 3 1 2 3 LastLast
Results 1 to 10 of 22

Thread: front end issue

  1. #1
    Senior Member blu3fan's Avatar
    Join Date
    May 2015
    Location
    Arizona
    Posts
    560

    front end issue

    Hey guys.
    I rode the bike to work last night. no issues.
    Rode her this morning and I could see the front end doing what I would describe as *Hopping* while riding at anything past 55 my front wheel appears to be pulling back towards the frame. back forth back forth. gave me some wobbles.
    Ive been fighting with this 75mph wiggle before. so this might be a bearing failing or something.

    I suspect the brake could be sticking also.

    is there a normal cause for this ? Its hard to explain but I could see the front end physically moving fowards and backwards. which felt like the front end was on a bumpy road.

    I know its unsafe to ride it further until fixed.

    Could anyone comment on what this could be before I rip it all apart?
    1982 cm450e hardtail conversion.

  2. #2
    Sensei 66Sprint's Avatar
    Join Date
    Sep 2008
    Location
    Roanoke, Virginia
    Posts
    24,626
    Check steering head bearings first... If loose the front end will will seem to pull in and then drop back forwards as you decelerate...
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."
    Contact info: E-mail; [email protected] Phone; 540-525-5199

  3. #3
    Senior Member blu3fan's Avatar
    Join Date
    May 2015
    Location
    Arizona
    Posts
    560
    Quote Originally Posted by 66Sprint View Post
    Check steering head bearings first... If loose the front end will will seem to pull in and then drop back forwards as you decelerate...
    thank you. I will start there.
    that really makes a lot of sense for what is feels like.
    Last edited by blu3fan; 05-08-2019 at 08:05 PM.
    1982 cm450e hardtail conversion.

  4. Remove Advertisements
    HondaTwins.net
    Advertisements
     

  5. #4
    Senior Member ancientdad's Avatar
    Join Date
    Nov 2016
    Location
    Nature Coast FL
    Posts
    6,867
    A "hopping" wheel could be out of balance too. Did you balance the wheel after a tire replacement, or get someone to do it for you?
    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

  6. #5
    Senior Member blu3fan's Avatar
    Join Date
    May 2015
    Location
    Arizona
    Posts
    560
    lifted the front end.
    turning handlebars left and right. no spots on the neck bearings. that feel rough.
    spinning the wheel I feel nothing binding.

    loosened everything. greased it and re-tightened it.
    rode her up and down the street.

    feels like the rear end is floppy now.
    like the rear tire is wavering left and right.
    it does not feel safe.
    I think its coming from the front. because that is the only bit I messed with.

    Replace everything ? wheel bearing and neck bearings ?
    Honestly the more I think about it I don't think I fully seated the bottom neck bearings when I did them years ago-
    1982 cm450e hardtail conversion.

  7. #6
    Senior Member mike in idaho's Avatar
    Join Date
    Jan 2012
    Posts
    2,090
    Straddle the bike with your feet on the floor and hold the front brake while you push it back and forth, any movement in the steering head bearings? With it on the centerstand, grab the rear wheel and try to move it back and forth. Watch for movement in the swing arm pivot and at the wheel,between the brake drum and backing plate.
    '65 YG1
    '65 CB160
    '66 CL160
    '67 CL77
    '68 TR6
    '69 T100R
    '69 T120R
    '72 Commando 750
    '78 XS650E
    '79 Gl1000
    '81 440 LTD
    My company car is a Kenworth

  8. #7
    Senior Member pemdoc65's Avatar
    Join Date
    Feb 2016
    Location
    Shepherdsville, KY
    Posts
    443
    Quote Originally Posted by mike in idaho View Post
    Straddle the bike with your feet on the floor and hold the front brake while you push it back and forth, any movement in the steering head bearings? With it on the centerstand, grab the rear wheel and try to move it back and forth. Watch for movement in the swing arm pivot and at the wheel,between the brake drum and backing plate.
    If it is the bike in his signature, it should be a hardtail conversion. Are there any cracks in the frame?
    1965 CB450 K0
    1966 CB450 K0 (current project)
    1964 CB77
    1965 CB77
    1964 CB72 (upcoming project)
    1965 CB72 (current project)
    1964 CA77
    1972 CB350 K4
    1960 Triumph TR6 Trophy (always looking for parts to finish this one...)
    1980 CB750K
    1982 XL250R

  9. #8
    Senior Member ancientdad's Avatar
    Join Date
    Nov 2016
    Location
    Nature Coast FL
    Posts
    6,867
    ^^^then there's that... I've been wondering about that all along. You can also put the bike on the centerstand (if it has one at this point) and push the front wheel backwards to see if the neck bearings are loose
    Tom

    Ride along at the drag strip - https://www.youtube.com/watch?v=20jFPazXlvU



    running points... because I'm too old for mysteries that begin with pushing

  10. #9
    Senior Member blu3fan's Avatar
    Join Date
    May 2015
    Location
    Arizona
    Posts
    560
    Im gonna go jack it up later on and hit it with a prybar.
    it is possible the frame cracked..
    ill post any updates.
    good idea to hold the brake and push it to see movement

    The bottom neck bearing - if it wasnt seated fully - could now have worn down and could be moving. It was something where I did it with a hammer. and at a certain point the bike was moving but the race didnt seem fully seated.
    ^
    thats my current thought.
    1982 cm450e hardtail conversion.

  11. #10
    Senior Member blu3fan's Avatar
    Join Date
    May 2015
    Location
    Arizona
    Posts
    560
    Hmmmm.
    No motion. But this seal is blown.
    Maybe this is the cause ?
    Attached Thumbnails Attached Thumbnails front end issue-mvimg_20190511_124258_1557603996864.jpg   front end issue-img_20190511_124302_1557604027979.jpg  
    1982 cm450e hardtail conversion.

Page 1 of 3 1 2 3 LastLast

Sponsored 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. WTB 71 cb450 complete front end or trade later front end
    By racer36 in forum Wanted Parts and Bikes
    Replies: 0
    Last Post: 03-18-2018, 10:07 PM
  2. Its alive! Kind of...idle issue, rev issue, smoke issue...
    By BOX in forum Fuel Supply and Carburation
    Replies: 4
    Last Post: 05-27-2013, 11:27 AM
  3. help with diagnosing front end issue with pic- sl350 ko
    By jpatt in forum Frame, Suspension and Steering
    Replies: 4
    Last Post: 11-25-2012, 09:22 AM
  4. cl450 front end vs cb450 front end
    By Jaybirdmcd in forum Tires, Wheels, and Brakes
    Replies: 1
    Last Post: 02-18-2011, 10:02 PM
  5. CL handle bars, Cl front end or XL250 front end wanted
    By NOS351WCM in forum Wanted Parts and Bikes
    Replies: 0
    Last Post: 09-06-2010, 12:00 PM