[500KsGerry]

Blltrdr....Replaced rear tyre with a 110/90 19  Chengshien . Changed  front out to match also.    Gerry

[RBHoge]

Years ago When my Honda CB-450 and I were first getting acquainted, I experienced my first "High Speed Wobble"  I was following my friend and motorcycling mentor Mike, onto I-40 in Nashville. I passed over a rain grating and nearly bought the farm. The bike was without windshield or fairing at that time.

It really scared the s#-t out of me.  Mike advised me to avoid rain gratings and should I ever experience such a wobble again, to either let the throttle close,  lightly touch the rear brake, or lean into the handlebars,give ti more throttle and "punch through it.

Some weeks later, when I had added a Wixom Ranger fairing to the bike, I noticed that at thirty-two M.P.H. the bike would wobble gently if I took my hadns off of the handlebar. Otherwise the wobble was completely unnoticeable.  I did notice at seventy-four M.P.H. the bike would give a marked "shrug" as I accelerated through that speed. (There was nothing noticeable if I decelerated back through)  At eighty the bike hummed along like a champion. (I rode from Nashville to Atlanta a dozen or so times on that bike and only noticed a "wobble" passing through 74 or when I found myself "dancing in the @#$%! "Rain Grooves" Georgia put on every bridge.   

[Geirskogul]

Only ever experienced speedmans wobble at the same type of area as RBHoge. 

Stupid cattle grooves!

[RBHoge]

After several bridges, I noticed that there was usually a gap in the rain groves where the grooving machine was not quite the width of the lane. this most often left a gap near the center of one lane or the other about a foot wide. I just aimed for that smooth strip. No problems from there on.