According to the member quoted above, it clearly states that pretty much all (if not all) Ninja 300s will develop this issue.
You could have quoted my name in the quote if you're already quoting what I said.
Indeed I deeply feel that's the case. It's just the design of it that's poor and they wear and fail prematurely. The reason some bikes take longer is because their bearing was packed and greased correctly, and that's prolonging the life of it. As soon as that grease starts getting used up it will start to wear. The only way to prevent it would be to keep regreasing the bearing every so often but if you're going to have it apart to do that might as well replace it.
I'm tired of hearing
Tired of hearing it? It's something you will ALWAYS hear on these forums until Kawasaki does something about that stock bearing. It was well mentioned way before I ever started talking about it so I don't know why you're holding it specifically towards me. It's a safety concern and I will make sure every 300 owner is aware of it. New riders have no clue what they should be feeling and they have no clue what's normal or not. If I personally can inform people and have people test for it every so often it could save their life. All the replies here so far are of people stating they noticed some form of wobble. It would be very odd and strange that all of these people have it because of their tires or rims, and not because of a known corner cut that involves a poor quality and poor design steering head bearing.
A lot of strong and powerful language used, and I don't think it's true.
Strong language indeed because unfortunately it has happened to too many 300s to be considered a fluke. I could see maybe a a good handful of 300s only having it but the fact that so many owners throughout the world has had their head bearings fail means that it's a known issue and it's something that shouldn't be ignored. There's way more owners who have replaced them than owners who haven't. Greased properly or not they will eventually fail it's just a matter of time. Again it's a unfortunate thing but it's a present possible issue and every owner or future owner should be aware of it. For those who do have a wobble the upgraded bearing is under $40, and is a major improvement, and you'll no longer be gambling with your life.
I don't want new riders or potential Ninja 300 owners to be turned off if they read opinions like this when they're researching their purchase.
You rather them not know and possibly get injured or killed due to it?
They shouldn't be turned off as the 300 is a great first bike or a great bike in general. However, this is a known possible issue with the 300, and they have a right to know that there's a STRONG POSSIBILITY that in as little as 1,000 miles they could develop a wobble due to the bearing. There's no reason why this should deter people from purchasing the bike. I feel it's better for them to know than not to know as this can be a serious safety concern. I just don't want to see people ignore it, and be put at risk. There's no reason for someone to get hurt which CAN happen. My wobble was so bad it was scary, and I don't wish that risk on anyone I really don't. The people who claim they have no wobble is a wonderful thing, and I'm happy for you guys not having to deal with it but that doesn't mean it doesn't exist, and it doesn't mean it won't eventually happen. There are too many owners who have had the problem, and replaced them and it went away. Sure, sometimes the tires or a bad rim can cause a wobble but that kind of wobble will be felt no matter what speed you're at or no matter the pressure you have on the bars while the head bearing wobble causes the bike not to be secured to the ground if you will. Again, it's a safety concern that should be checked for every so often. Again, I just don't want to see someone lose control of the bike because of it. My handlebars slapped back and forth some quick and hard that my bike could have easily veered off. A $40 part can save your life.
Muilisx is wrong. I'm saying less than 50% of 300s have this problem....not the 100% Muilisx claims.
How am I wrong? There's nothing to be wrong about. It's a poor quality part, and a poor design. I'm not the who who originally informed people about it. This was plastered all over the forums, and different forums as well. There are only a VERY FEW of you guys who claim not to have it while everyone else has had the issue. It's way more than 50%. I never said every single person will have to replace it at the same exact time but every single 300 will " eventually " develop it because it's just the design and quality of the bearing. Again, all because a few of you don't have the symptoms yet doesn't mean you're in the clear and it doesn't mean it doesn't exist. It just hasn't happened to you yet. There's also no reason to point the finger at me specifically because I'm only repeating what was already said. This isn't the only forum or source on the internet that says the stock heading bearing is garbage and will fail. The Ninja 250 forums mention it about the 300, other sources from Google mention it, people on YT mention it. Even the service manager and their head mechanic at my dealer are in agreement about it. He was the one who told me to not even bother with trying to do a warranty claim with it because it the job was approved it would just be replaced with the same part, and the issue will most likely come back once millage is put on the new one.
You're basically calling me a liar and telling people I'm wrong when I've personally had the issue myself so I have experienced it first hand and I can honestly say not only is it scary, and could cause an accident but it's far from normal and should not have happened after 1,000 miles. You can say whatever you want but it's there, and it should be known, and everyone should be doing the test that's quoted above to make sure they aren't developing the wobble. Again, I wasn't the first person to ever mention this, and this isn't anything new that we're hearing from the first time. This has been greatly discussed and mentioned over the years by too many different people because it exists. Again, not sure why you're pointing the finger at me. Even YT is full of videos of people doing the swap. It's well known in other places than just here.
I bet there are more 300s out there that doesn't have a head bearing problem.
There are WAY MORE 300s that ALREADY have had the issue, and replaced them. This forum alone has more people who have had the issue than people who haven't so not sure how you can even say that. There's only like 2 or 3 of you who claim you don't have it while way more than that has so that isn't the case. Until that number grows and the ratio balances out to all the owners who have had the issue it's safe to say that it's something to be aware of and it's something you should be testing for.
You're making it seem like it doesn't exist and you make it seem like you don't want people to know about it because it hasn't happened to you yet which isn't cool because this could possibly cost someone their life. There are too many members here who have encountered it and replaced them for it not to be something to be concerned about. It can be a major safety hazard as it has to do with the steering of the motorcycle and has to do with the bike being secured on the ground. Again I just don't want to see anyone get hurt over it because they ignored it or was told not to worry about it.
Definitely test for it every so often which is the only thing I can recommend to do. There's no reason to ignore it or not check for it, and risk the possible injury or death because of it. If I would have ignored mine when it became really bad I could have killed myself. I felt the bike dip too many times in a turn to where I didn't feel secured to the ground. It was a very scary feeling, and as soon as I replaced it the wobble went away, and everything else regarding the steering was 100% better in every aspect.
I'm sorry cadd but don't go around telling other people someone is wrong or implying they're a liar all because you personally are lucky and haven't experienced the issue. All because you and Dave don't have it doesn't mean anything. That's 2 people who claim they don't have it while there are WAY MORE who have. I mean not sure how you can say less than 50% when you two are pretty much the only ones who claim they don't have it in the history of the 300 while everyone else has mentioned they have a wobble on decel, and again it's not because of a tire or a rim. Sure, a bent rim can cause a wobble but that wobble would be felt no matter the speed. The head bearing wobble is very specific and if you do the test above and you notice even the slightest back and forth movement from the bars then you have it, and it will progress over time.
Again, it's a safety concern, and that's the only reason why I jump into the conversation about it when it's mentioned. It doesn't hurt to test for it every 500 - 1,000 miles to see if it's developing, and if it is just bite the bullet, and replace it with a much better quality head bearing, and much better design, and be done with it. The only reason I would not replace it is if you don't plan to keep the bike for a while but if you do plan to keep the bike for a while then there's no reason not to swap it out. I rather pay the $40 for the part and $200 in labor than go down damaging the bike and injuring myself or risking my life.
Accelerate to about 60mph, close the throttle, and take your hands off the bars hovering them over them in case you need to grab them. As the bike decelerates through the 40s and 30s watch the bars for movement. It could either be a slight wobble or if bad enough they will literally slap back and forth. The bike won't necessarily veer left and right but you will clearly see the handlebars wobble back and forth. This isn't your tires, or your rim this is the free play within the bearing that reveals itself as a wobble. If your rim was bent and caused a wobble it would be felt and seen any any speed. This test is specifically for a head bearing. Removing your hands is the most important part because you need to take all the weight and pressure off the bars. If you have a wobble from the head bearing and you're holding the bars during the deceleration you won't see it because the weight / pressure on the bars is going to prevent them from moving so make sure you're not holding them as the bike slows down through the 40s and 30s. As soon as you reach 30 you can grab them again and accelerate back up and keep riding. Do it a few times to really test for it. It really doesn't matter what gear you're in but I recommend doing it in 3rd. You're not going to go down by doing this test. I've done it so many times when I had the issue because it's all I thought about when riding. Every single ride I went on consisted of me doing the test about 10 times, and my wobble was really bad probably the worst it could be. I wish I had a GoPro back then so record how bad it was but trust me it was bad, and very unsafe.
Again, it's unfortunate and a shame but it is what it is.
Didn't worry too much because I don't ride without hands on the handlebars.
No one does that but that's how you test for it. Having your hands on the bars pretty much stops the wobble because you're holding it. It's like when your car pulls to the left or right. It's because you need a wheel alignment. The car only pulls when you let go of the steering wheel because when you hold the wheel you're countering the pull but it's still there and can still cause an accident. It's the same idea with the wobble If you're holding the bars you're countering it but it's still there. If you let go of the handlebars during deceleration the bike should have no wobble, and should go straight as an arrow for as long as the bike has momentum.
For the members who are noticing a wobble on deceleration or for those who have tested for it using the above method and do notice a slight wobble developing you can buy the new ones here.
As a member here you get free shipping. You'll submit the order with shipping tacked on, and Hard Racing will adjust it before charging your credit card. There should be a information box. That's where you can mention you're a member or you can send a PM to Hard Racing and just let them know you're submitting a order and would like the free shipping forum discount, and tell them your name so they can look out for the order.