fwy wobble

[not a biker]

i picked up a nice 84 gs 1150 es about 3 weeks ago. it already had new metzler tires front and back.
so yesterday i was on the fwy and noticed a tire wobble at all speeds. not a good feeling. i also hade a new 750 honda that did this many years ago. it only does it when they cut rain groves in the concret. as soon as i get on regular pavement it is gone at all speeds. i suspect it is the tread design causing the problem. this is the first bike i owned that does this in a long time.
i do not think it is a steering head bearing or alignment problem. those tires are new and if that is the reason i will live with it. the shake at fwy speed is not real bad but it makes you not enjoye the ride.
has somebody else felt the same wabble on rain groves.

[jknappsax]

My Continental RB2 does the same thing on rain grooves or a metal bridge, but no time other than that. The Conti has ribs that run the circumference of the tire, and they hunt when riding over anything that has a longitudinal pattern. If you get this on non-grooved roads, it's not the same effect.

[Billy Ricks]

If it's only doing it on grooved pavement I don't think it's the bike. No matter what tire I've ever run grooved pavement will make my bike react that way.

[SqDancerLynn1]

The small 16" front tire can agravate any handeling problems. Need to do the usuall things Rear wheel alignment, steering stem torque (doesn't matter how it feels), tire wear, tire balance etc

[toolman]

i picked up a 84 gs1150 this year and it handles kinda spooky in grooved pavment, but not too bad the rest of the time . i think the suspension is too soft and if you have any play in the axle brgs., swing arm bushing or rear shock mount bushings it will make it worse.as far as your vibration goes have the tires and rims ballanced . good luck

[Clone]

When they grind the pavement down, and leave the grooves your bike tends to follow the grooves, some tires do this more than others, but I find as long as I don't decellerate and keep a relaxed posture the bike wants to go in a straight line and will as long as you don't fight it.

[chef1366]

Tighten down the triple tree. It's the center bolt in the center behind the handle bar clamps. Try a quarter turn at a time.