need help steering wobble

[matt]

alright lets see if I can explain.  Did nothing to front end of bike this winter I did put on a rebuilt rear diff. I took bike atleast a month ago it felt fine.  last week I got on it heavy and I had one hell off a steering wobble. next ride I could feel like something was wrong. I took off tire checked balance,checked wheel bearings and tried to do pull on bottom of forks found nothing  bad. I took bike out to night and could  still tell not right. problem from other day still there,if I excelerate any speed let go of throttle and loosen up grip on handle bars there is a wobble not as bad as the death wobble I had last week but still there. now tonight if I am sitting still and jerk handle bar quick back and forth I can still feel a wobble i will call it thru handle bars not sure if it did that before but the vibration when I do that really reminds me of the feeling. Sorry so long winded but this one has me stummped.  Be Good, Matt

[DFragn]

Since you've apparently done nothing to the front end until it acted up I would look to the rear.

If the rear is moving just a bit it can transition forward and seem to be the front acting up.

Perhaps you torqued the 4 rear drive bolts to the drive shaft housing prior to torquing the rear axle.

[matt]

nope I tightend them up after, that was why rebuilding of rear was needed. Thanks though i appreciate any help with this. but the thing that bugs me the most is if I shake or jerk handle bars bike off and not on kickstand I swear I feel vibration through handle bars as I stop  jerking them, I mean a quick jerk of 1/4 movement both ways with handle bars.  Thanks again   Matt

[DFragn]

nope I tightend them up after, that was why rebuilding of rear was needed. Thanks though i appreciate any help with this. but the thing that bugs me the most is if I shake or jerk handle bars bike off and not on kickstand I swear I feel vibration through handle bars as I stop  jerking them, I mean a quick jerk of 1/4 movement both ways with handle bars.  Thanks again   Matt

Here's an idea.
Do that quick jerk repeatedly with someone watching the rear wheel & fender, get on it hard.
If the rear fender seems to be moving & tire is not [doubt you could move the tire anyway] then I would re-torque the swingarm bearings. However, special sockets are required.

Improperly torqued swingarm bearings can cause the sensation that it's the front end.
Just something to check.

[R J]

1 of 2 things.

Rear end improperly installed and torqued down.

Front tire has a flat spot on it from setting in one spot all winter.

If the tire brand is a Dunflop on the front, that is where I would head for 1st.

Happy hunting.

[RonW]

That's definitely an experience that I've also heard of before that I never want to go through. My guess is that the wobble is coincidental and unrelated to the rebuilt pumpkin.

[BG99IS]

I had a steering wobble.  Replacing the steering head bearings and the front tire fixed it.  The bearings are available from Honda but I wrote down the numbers on them so you might be able to get them from a bearing supplier for a lot less.  The bearing numbers are:

NACHI E 3200 5JS/26
NACHI E 32006J

[matt]

well appreciate all the help, soon I am hoping to be able to get to riding again Be Good, Matt