This is exactly what I meant by nobody wants to go round & round with you. You are asking the same thing again when the answer is already right in front of you. What's worse is you ask specifically for advice from "racers" then immediately tell us you don't want that kind of advice because you are just doing the occasional trackday. Again, why nobody wants to really spend the time to help you, but I will give it one more go...
I already explained to you about the Ohlins fork oil...
If your friends stock Gen4 was perfect handling and your Gen4 handles like shit then what is different? The work that was done by your suspension tuner?
If you really want us to hold your hand through this then you will need to give us more info.
What are your current sag numbers?
How much preload did you dial in to get that rider sag?
How much do you weigh with or without gear?
What do you have the rebound and compression adjusters set to?
Have you adjusted the ride height of the front forks or shimmed the rear shock?
How much fork tube is showing above the top triple clamp?
How about your friends bike? How does his set-up differ from yours?
What oil level did your tuner put in your forks?
What oil did he use?
Without that info it would be total guesswork on anybody's part to try to help you properly and even with all those questions satisfactorily answered it will still be a difficult task without putting hands on the bike.
Here is the info you need on the proper way to work with a linkage although I am sure you won't take advantage of this level of information and instead will want to use some halfass idea of mixing and matching OEM parts from different bikes to basically find the cheapest possible improvement which also yields the smallest incremental benefit. Somebody else will have to give you that info, but if you want to know the correct and proven way to use a linkage here it is.
Gen 4 ZX-10R 5% Linear Race Link
First of all, I appreciate the time you took to answer me. Thanks for that. Now, please forgive me if I got it all wrong, maybe it's just me, but it seems like you are getting a little unpatient helping me.
Look, I live in Israel, we don't have racetracks here so every time I want to ride safely I have to fly to Europe, arrange a transport for my bike from Romania to wherever I'm going, book hotel, rent a car, pay for a mechanic etc...it cost a lot ! so putting Ohlins suspensions is a luxury I can't have right now. Trust me, I would give everything to have a 20K$ race bike with a decent mechanic and tuner but I can't. I've managed to find a mechanic who's willing to store my bike, provide transportation and help me during my free practice or race events so I can't be picky about it...
The situation I have just presented is also the reason why I can't answer the questions you asked right now as my bike is 1600km away. All I can say is that my weight it 74kg without gear, we did the sag thing and that we tried to match the setup on my bike exactly as on my friend's Gen4 and it didn't work. That's why I asked if the oil may has something to do with it. I don't know if the oil can cause these kind of problems.
There are a lot of articles online about suspensions symptoms and how to solve them. Unfortunately I couldn't find one that addressed my issues so I decided to ask you guys.
Maybe I wasn't clear with my question. You'll have to be a little more understanding as English isn't my native language. Sometimes I get all confused with technical terms about suspensions and such. Also, there is no information in Hebrew about this stuff.
I tried my best to describe what the bike is doing (or not doing) hoping to get an answer like "if the bike resist coming back to upright than usually it means you have too much rebound or too much compression etc".
The reason I asked for racers opinion is because racers understand suspensions symptoms and know how to address them better and more accurate than common street riders. I'm not saying I'm expecting to get my issues %100 solved here in this forum but I must try and get all the info I can, even if it will only be a starting point. I must do it before flying overseas just to realize the help I got wasn't accurate at all.
I think the reason to use a forum like this one is to share information so I didn't quite understand why you wrote that nobody want to spend time helping me...? I do race, but I can't afford replacing the suspensions or putting Brembo MC and rotors for that matter. Is that a reason not to try and help?
Anyway, like I wrote at the beginning, I really do appreciate your time and your help and I hope you can now understand what I have go through and how much I have to pay just to be able to ride my bike in a safe environment (a racetrack).
I will try to find more information about the linkage thing. I want to know if replacing mine to a linear one will do any noticeable different when using the stock suspensions.
If you can provide me with some basic information about the symptoms I described and how to address them it will be great. It will give us a starting point. Also, if you can recommend a decent fork oil to use with my stock suspensions it will be much appreciated.