Oscillating Forks

[robert]

Holysmoke if your rear tyre has flattened off, that could account for half of your handling problems.

30 Pounds front and rear. I'll Check the bead

That could be part of the problem. I had a '78 S and anything less than 34f and 38r would be a problem with no luggage or passenger.

[ME 109]

Holysmoke if your rear tyre has flattened off, that could account for half of your handling problems.

30 Pounds front and rear. I'll Check the bead

Aha! Different kind of flat.
I'm referring to the rear tyre wearing flat across the tread.

As Robert pointed out, 30 psi is too low.
From my experiences, minimum pressures should be 33-34 front, and 34-35 rear.
Some folk run 40 psi rear, which imo is too much.

[Holysmoke]

I'll pump up the air. Good input

When I rebuild my forks, how much 7.5 oil do I add to each fork?

[SteveD]

When I rebuild my forks, how much 7.5 oil do I add to each fork?

Factory manual says 250ml each side, from the 60/7 to the R100RS..

[Duane Ausherman]

1. When you say "bouncing" do you mean up and down, or is there any side to side? The subject uses the word "Oscillating" and that is different than up and down. Which is it?

2. If it is up and down, does it do it at a steady rate at the speed where you notice it?

Up and down is not likely the forks, but has to do with the wheel. I would first check the wheel for proper seating, balance and wear pattern.

It isn't easy to balance the wheel, so do you know who did it last? Few shops know how to balance a BMW motorcycle wheel, that includes dealers.

Tire pressure is important, but probably has nothing to do with "up and down" motion. However, I too would run more pressure.

My website, w6rec.com deals with just about everything to do with the wheels and forks on your bike.

[Holysmoke]

1. When you say "bouncing" do you mean up and down, or is there any side to side? The subject uses the word "Oscillating" and that is different than up and down. Which is it?

2. If it is up and down, does it do it at a steady rate at the speed where you notice it?

Up and down is not likely the forks, but has to do with the wheel. I would first check the wheel for proper seating, balance and wear pattern.

It isn't easy to balance the wheel, so do you know who did it last? Few shops know how to balance a BMW motorcycle wheel, that includes dealers.

Tire pressure is important, but probably has nothing to do with "up and down" motion. However, I too would run more pressure.

My website, w6rec.com deals with just about everything to do with the wheels and forks on your bike.

The motion appears to be consistent with the travel of the forks, but it's hard to be sure. I need to check the balance. I'll check your website. These tires are fairly old, over 14 years. Not cracks or anything. They seem to ride okay, other than the bouncing.

[Bamboo812]

14 YEARS???? Change your tires!

[Holysmoke]

14 YEARS???? Change your tires!

Well, when you put it that way... Lol

You're right. What's a good tire for this bike?

[Bamboo812]

Bridgestone Spitfire S11

[khittner1]

Michelin Pilot Activ. Available in the correct inch sizes front and rear.