Yeah, but my friend has a professional tire changer in his garage and does it in about 5 minutes and only charges $10. It's good to have friends who do so many track days that they buy their own tire machine to save on tire changes!with a few basic tools its not bad at all to swap the tires out.
i'm not trying to say you're wrong or anything negative here.
Yeah, I was shocked at how thin a used tire feels in the middle. You can easily indent it with a thumb while it's still on the wheel. It's clearly only about 1/8" thick and has very little puncture resistance.i noticed that when i replace a tire, even when the indicators are about to come through, is noticeably flimsy.
Really, I assumed you were dead serious. oke:Yea, just havign fun...I dont think it could be done, could it?
I do remember trying to put a 17 on an 18 inch rim. We were kids.....
Boss we will just have to agree to disagree on this one. I have had a very different experience in my motorcycle life. Having worked at a couple of different motorcycle shops and in doing so having the chance to ride a ton of different motorcycles on test rides and what not, it has always been my experience this happens with a worn front tire and is always fixed with a new tire.Absolutely. In my experience it's right around 40-45 mph and multiples thereof. And it sometimes has NOTHING to do with the tires. I've experienced this when:
Put a top case on a '90 VFR. Anything over a pound or two in it and got that symptom.
Ventura luggage on multiple VFRs did this IF the case was mounted behind the rear seat. Flip it around so the bag was over the passenger seat and all was stable.
An ST1100 with what turned out to be a bent rear shock rod (new from factory) had this same problem.
Dunlop tires in the early 90's on my VFR did this after a couple thousand miles. They cupped and vibrated and caused the headshake as well. Running them at lower pressure solved the problem but I didn't like the handling.
A Metzler bias ply tire on my '87 VFR did this from new. Took it back and got it rebalanced. Same issue. Finally someone noticed the runout on the tire was out of spec. A new tire fixed the issue. Runout, in this case, was left-right motion of the tire when you spun it on the balancer. It was about 3mm and the maximum spec for it was about half that I think.
Flattened steering head bearings did the same thing. Replacing them fixed it.
There were articles back in the day about loading motorcycles and how any weight behind the rear axle was bad news. This kind of headshake was pointed to as one of the symptoms of an improperly loaded bike. It also had a lot to do with fork flex, tire sidewall flex, frame stiffness, etc. so things might be a bit different now with upsidedown forks, stiffer frames, bigger tires.
The thing that always fascinated me was that one finger on the bars and you never knew the headshake was there. Given total freedom, it shook like crazy.
Hands off the bars on the Ninja causes nary a wiggle. See:
View attachment 80291
I've had this on most of my bikes at around 40mph. My Ninja does it right now. Haven't been able to pin down the cause though I haven't tried very hard yet.Has anyone else experienced it on a motorcycle where you let go of the bars and as the bike slows down it starts to get head shake, gradually worse and worse until you have to grab the bars? Tends to happen at the same speed over and over....
This happens because the front tire is out of round. Now it did not do this when the tire was new, because when new the tire was round. Tires do not wear evenly.
Now you can balance the front tire/wheel assembly when you have this happen, and you will notice it will keep on happening. The only fix is to replace the front tire.
Tires don't wear evenly because what they touch is not even and the forces applied to them are not even. That is my opinion anyway
You should first re-balance it for sure. It will be informative. After that I bet you $130 that a new front tire makes it go away...lol It's pretty common.I've had this on most of my bikes at around 40mph. My Ninja does it right now. Haven't been able to pin down the cause though I haven't tried very hard yet.
Reminds me of that joke:
Rider: Hey Doc, it hurts when I go like this.
Doc: Well don't go like that.
I'll hand that one off to bakwheeltango! Can't wait to see that video either.And next pic we need a one handed wheelie Can be a sit down to start with if you like, but then working into a stand up one hander
I think this is where you are me are having a difference of opinion.I'll hand that one off to bakwheeltango! Can't wait to see that video either.
As I've noted my experience is pretty much limited to VFRs but I only report on my experience. I find this a fascinating issue because no matter how much I've read over the years I still don't quite understand it. Especially the rear loading and bent shock rod causes of head shake.
Personally, I feel headshake is an indication of something out of whack so I try to track down what's causing it because I don't want a "hands off" shake at 40 mph to bite me in the a$$ at 120.
And Hey sqid, riding a motorcycle can hurt you so don't do it!