Bumpy feedback after tire change - Yamaha R1 Forum: YZF-R1 Forums

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post #1 of 12 (permalink) Old 09-10-2016, 02:29 PM Thread Starter
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Bumpy feedback after tire change

So I just had a set of Q3's installed on the bike after my trackday and now I have this like 2-3 bump feedback every 1-2 seconds when at lower speeds. I can feel it in the bars but not 100% sure its coming from the front tire. I took the bike back to the dealership and still has the same issue after they changed the front tire with a new one. Anyone else had this issue after getting new tires?


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post #2 of 12 (permalink) Old 09-10-2016, 06:01 PM
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Did they balance them?

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post #3 of 12 (permalink) Old 09-10-2016, 06:47 PM
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as above. also worth checking the wheel bearings as one could be starting to fail


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post #4 of 12 (permalink) Old 09-10-2016, 07:59 PM
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Chain tension might be too tight and fawked up your bearings.


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post #5 of 12 (permalink) Old 09-10-2016, 09:42 PM Thread Starter
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Quote:
Originally Posted by 2muchbluE View Post
Did they balance them?

Yes Twice

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Originally Posted by tigertim20 View Post
as above. also worth checking the wheel bearings as one could be starting to fail
I'm no expert but what exactly would I look for because the bike only has 2300miles on it and the chain has never been to tight

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Originally Posted by Kangaroo View Post
Chain tension might be too tight and fawked up your bearings.
Shouldn't be anything with chain tension as the chain has been within spec the whole time. I check that frequently. Guess I'll have them check the bearings anyways though


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post #6 of 12 (permalink) Old 09-11-2016, 10:10 PM
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the thing that changed is you went from bridgestones, soft carcass tire, to dunlops.. hard carcass tire.

also, the sidewall of the Q3s have carbon fiber, a hot selling point but they probly also affect the comfort factor. i experienced same thing on brand new set of q3s on my raven before it was stolen.

also, this stiffer slightly less comfy tire is gonna show you even more how on/off the front forks are, cuz of that damn shim in the bottom which doesnt let oil flow well. its the first thing dave talked about when he and i were discussing the stock front end. its like item #1 on his to do list for this bike apparently, and it greatly improves things.

also, the dealer probly set them to those bullshit pressures on the sticker, which is often a state mandated thing. try setting them to 33F/33R cold for the street and see if that buys you a little more "squish" haha.

soon im posting an update to my settings thread, ive been fiddling lately and found a more comfy setup.
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post #7 of 12 (permalink) Old 09-13-2016, 07:16 PM Thread Starter
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Originally Posted by planetbuster View Post
the thing that changed is you went from bridgestones, soft carcass tire, to dunlops.. hard carcass tire.

also, the sidewall of the Q3s have carbon fiber, a hot selling point but they probly also affect the comfort factor. i experienced same thing on brand new set of q3s on my raven before it was stolen.

also, this stiffer slightly less comfy tire is gonna show you even more how on/off the front forks are, cuz of that damn shim in the bottom which doesnt let oil flow well. its the first thing dave talked about when he and i were discussing the stock front end. its like item #1 on his to do list for this bike apparently, and it greatly improves things.

also, the dealer probly set them to those bullshit pressures on the sticker, which is often a state mandated thing. try setting them to 33F/33R cold for the street and see if that buys you a little more "squish" haha.

soon im posting an update to my settings thread, ive been fiddling lately and found a more comfy setup.
I've had Q3's before on my 2010 and never had this issue. So today I decided to look at everything myself and I noticed they didn't take off the old weights and just added new weights. I had gorilla tape over the old weights from the track day and guess they weren't paying close enough attention to see them. So its going back in the morning for them to correct that and see if it solves the issue. If not I may be switching to a different tire for peace of mind


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post #8 of 12 (permalink) Old 09-13-2016, 08:54 PM
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Holy hell. That's pretty fail, I'd be yelling at the guys that did such shitty work. Sounds like an inertia problem, probly woulda happened no matter what tire you're using at the moment.

Keep us updated, curious to see if it gets sorted by just dealing with the wheel weights without changing anything else. If it's the same, then maybe suspension settings try next? I got an idea =D
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post #9 of 12 (permalink) Old 09-13-2016, 10:25 PM Thread Starter
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Holy hell. That's pretty fail, I'd be yelling at the guys that did such shitty work. Sounds like an inertia problem, probly woulda happened no matter what tire you're using at the moment.

Keep us updated, curious to see if it gets sorted by just dealing with the wheel weights without changing anything else. If it's the same, then maybe suspension settings try next? I got an idea =D
Hopefully we will know in the morning if its fixed. The place that did it is called RideNow and they are a authorized Yamaha dealer and have a pro account. So this ain't the out the way shop that did it. They said that if they cant fix it in the morning they will have to call Dunlop and Yamaha to find out if they have heard of this issue before. I'm just over here like"This wasn't happening before the tires soooooooooooo".I'll reply back here tomorrow and let you know what the outcome is.


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post #10 of 12 (permalink) Old 09-17-2016, 02:15 PM Thread Starter
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So I took the bike back and of course it took them all day to call me back because they had some work ahead of me but the guy said the vibration was gone after the rebalance. I picked the bike up but haven't had a chance to actually check. If its still there then I will be switching to a different tire. I'll take the bike out later to check and post back here


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post #11 of 12 (permalink) Old 10-04-2016, 10:04 PM
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.....well?!
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post #12 of 12 (permalink) Old 10-05-2016, 05:39 AM
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^^^^^^^^^^^^
I was waiting for the outcome also. I'd guess that the tire balance was the problem being I've ridden bikes with improperly balanced tires and it felt like what the OP described.


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