wobbling handle bars F650 classic

**saker** · #1 15 Sep 2005

When my '98 F650 is fully loaded with traveling gear (Jesse bags, camping seat bag) and when decelerating there develops a wobble in the handle bars (tank slapper like but very light). It only happens at 40 mph. For example if i decelerate from 60 to 50 mph or from 30 to 20mph no problems but if i cross 40mph mark i get a little wobble. And it dosen't happen when bike is unloaded. I have been adjusting tire pressure and that seems to affect the intensity but I can't completely solve the issue. What is a likely culprit? What else should I adjust?

Kyle

[This message has been edited by saker (edited 15 September 2005).]

**Frank Warner** · #2 15 Sep 2005

Basics - rear supension pre load - you have adjusted that for your load?

The steering head bearing preload could cause this.
Other things -
wheel beairngs (front and rear)
swing arm pivot bearings

**saker** · #3 16 Sep 2005

thanks

rear shock is good, brand new Olins thats fully cranked

Steering head bearing is good
front & rear wheel bearings were just replaced

As for the swing arm, those bearings looked a little warn (but BMW guys said they'd be fine) so i'll replace those the next chance i get which looks to be Quito

**Frank Warner** · #4 16 Sep 2005

Err go back to the last thing you did and check it. That is uysually my problem.

**Nigel Marx** · #5 16 Sep 2005

My F650 has been known to do this when the front tyre is both worn and off pressure. Not scary, just a gentle weave over about a 10km/h range.

Regards

Nigel in NZ

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