Death wobble
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Thread: Death wobble

  1. #1
    Senior Member blu3fan's Avatar
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    Death wobble

    Hey guys. Just got my 450 back up and running
    On the freeway at 75 round a bend she began wobbling. Like bars shifting left and right.
    Any ideas on troubleshooting this ?
    1982 cm450e hardtail conversion.

  2. #2
    Senior Member pemdoc65's Avatar
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    Does your bike have a front fender or fork brace? If so, check the tightness of the bolts. Also check your axle clamp bolts. If you don't have a fender or fork brace, you need one.
    1965 CB450 K0
    1966 CB450 K0 (current project)
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    1965 CB77
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    1965 CB72 (current project)
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    1960 Triumph TR6 Trophy (always looking for parts to finish this one...)
    1980 CB750K
    1982 XL250R

  3. #3
    Senior Member Alan F.'s Avatar
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    Jack up the bike and check wheel bearings for wobble, check for notchy steering bearings, and check for side to side play in swingarm bushings. Also make sure all engine mounts are tight to spec. Lastly have a look around the frame for cracked welds, unlikely but it can happen.
    longdistancerider likes this.
    CB250 Nighthawk projects 92,93,92.
    CM400C Sold 7-21-18 It's been fun, buh-bye.
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  5. #4
    Sensei 66Sprint's Avatar
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    Are the axle bottom caps on in the correct direction and tightened in the correct order?
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."

  6. #5
    Senior Member mike in idaho's Avatar
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    Hardtail huh? Did you change the rake or the trail in the front end? Raise or lower either end? Sometimes altering the suspension geometry can make things kind of spooky. You might want to fit some kind steering damper to the forks.
    oupa likes this.
    '65 YG1
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    My company car is a Kenworth

  7. #6
    Sensei 66Sprint's Avatar
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    Good catch Mike..... I was thinking DOHC 450 until I re-read the post......
    ancientdad likes this.
    "I have a mind like a steel trap.....Old and rusty, of antiquated design, and hard to get stuff back out of...."

  8. #7
    Senior Member blu3fan's Avatar
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    I just rebuilt it. No wobbles prior and everything is new
    I looked it up and it says to check position of boot running through wheel and loosen wiggle then retighten is what is seems
    I've hit 110 on this bike before without any wobbles lol 😂 as scary as that sounds
    1982 cm450e hardtail conversion.

  9. #8
    Senior Member blu3fan's Avatar
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    Position of bolt* running through wheel
    1982 cm450e hardtail conversion.

  10. #9
    Senior Member Chippe's Avatar
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    You got some good tips already but are the wheels in line?
    Check the swingarm, many are bent. I have 4 swingarms and they're all bent/tilted more or less.
    Edit: Ohh hardtail

    Maybe there is a better video but this is what first came up on Youtube:

    Last edited by Chippe; 02-26-2019 at 12:51 PM.
    devilclown likes this.
    Honda CM400 1979

  11. #10
    Senior Member oupa's Avatar
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    Uh, just wondering, have you checked the air pressure by chance?

    With an actual gauge that is. You don't mention where you are (or at least I didn't notice) but it is February. Heating a cold tire with low pressure can do weird things.
    Last edited by oupa; 02-25-2019 at 05:15 PM.
    "They're not like cars with a body that rusts out in a few years. Keep them tuned and overhauled and they'll last as long as you do. Probably longer." - Robert Pirsig

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