Bike wobbles - ZX6R Forum
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post #1 of 16 Old 05-17-2017, 10:22 AM Thread Starter
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Bike wobbles

I'm not sure if it is the wind today (about 20mph winds), but my bike feels wobbly at low speeds in a straight line. i had to get off the highway on my lunch today because the gusts were so strong and it multiple times it felt like the bike was going to go down. but even off the highway, it feels unstable. the unstable feeling has been kind of constant for some time now. it's usually okay at higher speeds, but even in turns on the highway (about 80mph or so, not leaning that far) it feels a little wobbly. My tires are 36 psi front tire/42 psi rear tire - pirelli diablo. Can that cause the wobbly feeling? I never had my suspension checked or changed.

im prepared for a UH, NO SHIT solution ha
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post #2 of 16 Old 05-17-2017, 10:58 AM
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You should at least get the sag and rebound dampening correct. Watch some Dave Moss videos and learn how to do it yourself. And yes, poor suspension settings can make your bike feel very strange in high winds and adverse road conditions.
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post #3 of 16 Old 05-17-2017, 11:16 AM Thread Starter
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You should at least get the sag and rebound dampening correct. Watch some Dave Moss videos and learn how to do it yourself. And yes, poor suspension settings can make your bike feel very strange in high winds and adverse road conditions.
okay, thank you. are my tire pressures too high?
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post #4 of 16 Old 05-17-2017, 11:25 AM
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Pressures are a bit high but for street they are ok. It kind of depends on how much you weigh. I run 31f/30r in canyons riding aggressive. I am looking for maximum grip, you are not. You should be concerned with mediocre grip and good, long tire wear.
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post #5 of 16 Old 05-17-2017, 11:30 AM Thread Starter
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Pressures are a bit high but for street they are ok. It kind of depends on how much you weigh. I run 31f/30r in canyons riding aggressive. I am looking for maximum grip, you are not. You should be concerned with mediocre grip and good, long tire wear.
got it. yeah i read some threads saying psi being too high can cause the tires to "snake" around, but my guess is that is for aggressive track riding/cornering and not just typical street riding.
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post #6 of 16 Old 05-17-2017, 11:45 AM
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Just to take tires out of the equation, lower the front to 32 and the rear to 34 and see how it feels. Definitely check some videos and tune your suspension. Your bike sounds like it could be bouncing down the road and feeling unstable. Your fork and shock should rebound when you push on it within 1 second and not bounce.
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post #7 of 16 Old 05-17-2017, 12:48 PM Thread Starter
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Originally Posted by the prophet View Post
Just to take tires out of the equation, lower the front to 32 and the rear to 34 and see how it feels. Definitely check some videos and tune your suspension. Your bike sounds like it could be bouncing down the road and feeling unstable. Your fork and shock should rebound when you push on it within 1 second and not bounce.
should i change to those pressures with the tires cold? or after a ride?

and okay, sounds good
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post #8 of 16 Old 05-17-2017, 01:33 PM
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Your bike probably feels "wobbly" from all the pot holes out there in Michigan! I used to live there, and visit regularly, and I can't imagine having to ride a bike on those sh@tty roads!
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post #9 of 16 Old 05-17-2017, 01:58 PM
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Sorry, cold pressures.
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post #10 of 16 Old 05-18-2017, 03:50 AM
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That rear tire pressure is way high. Drop them both down as was mentioned and take it for another ride.

Out of curiosity, how long have you been riding on the street?
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post #11 of 16 Old 05-18-2017, 04:40 AM Thread Starter
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That rear tire pressure is way high. Drop them both down as was mentioned and take it for another ride.

Out of curiosity, how long have you been riding on the street?
since last summer. so only on my second season! and its michigan so the bike was in storage from December to march/april
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post #12 of 16 Old 05-18-2017, 06:09 AM Thread Starter
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That rear tire pressure is way high. Drop them both down as was mentioned and take it for another ride.

Out of curiosity, how long have you been riding on the street?
also, i forgot to mention one thing i noticed is when the bike is parked, or im walking it to the garage, its super easy to turn the handlebars compared to before this problem. it was definitely stiffer before when i first got the bike. could that just be from the front tire having too much psi?
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post #13 of 16 Old 05-18-2017, 07:48 AM
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If your tires are flat, turning will be really slow. There's a ton of contact patch and the tire drags a lot. When you inflate them as much as you have, you get a much steeper profile and a smaller contact patch. This also makes the bike feel much more nimble. It'll feel easier to turn the handlebar at no-low speeds as well as feel more nimble on the road.

Never ride faster than you can stop
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post #14 of 16 Old 05-18-2017, 08:33 AM Thread Starter
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If your tires are flat, turning will be really slow. There's a ton of contact patch and the tire drags a lot. When you inflate them as much as you have, you get a much steeper profile and a smaller contact patch. This also makes the bike feel much more nimble. It'll feel easier to turn the handlebar at no-low speeds as well as feel more nimble on the road.
well, shit. haha. i dont understand why the owners manual has the tire specs at 42 rear, 36 front if its too high. the tires probably have lower specs written on them.
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post #15 of 16 Old 05-18-2017, 09:01 AM
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42/36 is way too high unless you are riding two up on the interstate

Steering head bearings good?

How many miles, how has it been treated/abused etc.....

Wheel bearings good?

I would be checking all these things before I rode it like that

Stupid people say stupid things on the internet, so be wary of who those people are. If you solicit advice on the internet, just keep in mind 99% of what you'll receive is not based on fact or science-and likely atleast 95% of it is based on bullshit and bravado regurgitated from some other schlub who also did not experience any of what they claim and are also full of shit. If you don't like my bluntness- too bad. I am not here to please you, so move along, your approval is not desired nor is it needed. So before opening your pie hole and adding more stupidity, perhaps sit back, listen, absorb and learn something. You know that saying, it is better to remain silent and thought a fool than to open your mouth and remove all doubt!
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