Two days ago, I picked up a weird rumble on my 14ES.
It's right at 99 kmh/61 mph. If I'm at steady cruise, you really feel it through your butt, not through the bars. Go faster or slower, it's sympathetic to that speed.
At first I thought rear wheel balance, but if I drop it to fifth, resume cruise, it's gone. That means everything that's turning wheel speed is eliminated: wheel, final drive, drive shaft, and output shaft of the transmission.
I figured out what is f creating the condition, but be damned if I can figure out why. Earlier in the afternoon I had put the suspension setting on hard, from standard.
Preload stayed on two up with luggage, my normal setting. I'm 240 plus gear, so that along with a Lusk rear +20mm raising link works for me.
Every time I'm rolling with the hard setting, the harmonic rumble happens at speed. Like going over 6 rumble strips with the rear, same length of time no rumble, then rumble again.
I'm at a loss to understand why it's happening. It's not a critical thing, just confusing. I wonder if it's a precursor warning of excess wear on a part, but that's a weak guess at best.
Anyone got any ideas?
It's right at 99 kmh/61 mph. If I'm at steady cruise, you really feel it through your butt, not through the bars. Go faster or slower, it's sympathetic to that speed.
At first I thought rear wheel balance, but if I drop it to fifth, resume cruise, it's gone. That means everything that's turning wheel speed is eliminated: wheel, final drive, drive shaft, and output shaft of the transmission.
I figured out what is f creating the condition, but be damned if I can figure out why. Earlier in the afternoon I had put the suspension setting on hard, from standard.
Preload stayed on two up with luggage, my normal setting. I'm 240 plus gear, so that along with a Lusk rear +20mm raising link works for me.
Every time I'm rolling with the hard setting, the harmonic rumble happens at speed. Like going over 6 rumble strips with the rear, same length of time no rumble, then rumble again.
I'm at a loss to understand why it's happening. It's not a critical thing, just confusing. I wonder if it's a precursor warning of excess wear on a part, but that's a weak guess at best.
Anyone got any ideas?