YZ250 Brembo Hydraulic Clutch Conversion with Valentini Technologies
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- Опубликовано: 8 фев 2025
- Follow along as I install the Valentini Technologies Brembo Hydraulic Conversion kit on my YZ250X. This add on was a game changer for my setup on the bike this year. The stock cable is great for 90-95% of the riding we do, but in the extreme nasty terrain, I was struggling with the clutch getting hot and having to adjust the cable on the fly. The main benefit of the hydro system is the hydraulic system automatically adjusts. So your engagement window of the friction zone on the clutch rarely changes much.
We had to do some slight modifications to the GYTR flywheel weight I was running, so I now have two custom flywheel weights in two of my bikes. Pretty rad being able to actually use my engineering degree and put all these products to the test.
www.valentinit...
If you still wish to run the stock cable clutch, then I highly recommend switching to this ASV lever. Made the lever pull easier, adjustments were easier on the fly, and you can get a more fine tuned feel at your fingertips.
www.rockymount...
Been waiting on this one! Thanks for all the videos on the builds big dawg.
I been on the road and go last two weeks with crap wifi. Took me a bit, but hopefully get back on routine again now.
I went thru the same dilemma. I tried fly wheel weights including the stealthy bolt on. I found the low end grunt and top end blur when I tried the ESR 325 kit (pump gas and HC domes come with the kit) with an lectron carb. I did this with a ‘16 yz250 pre X model. Also installed wide ratio 3-5 gearing. I got the engine very close to a 2015 TE 300 but better. With the bigger bore there was no need for a flywheel weight. Vibration was cut in half from stock bore. Installed a new oem crank I had trued, balanced and welded at crank works. I also use a hydraulic clutch and 22mm offset triple from ride engineering and sprung by factory connection. Also look into the DEP pipe, best one I found.
I just mill the YZ450 upper tree to get the 22.5mm offset and that made the bike... I'm way faster in the woods now.... Did the same to my WR250f
We rooting for you out here in Hawaii Braddah 🤙🏽🤙🏽🤙🏽 chee-hu!
You can machine the gytr flywheel and add weight out on the end, slightly.
And or press a thin sleeve over the magnet area to gain back the loss weight.
Such a better design over the Magura. I bought the Magura, installed it, rode the bike for 2 mins in my driveway and pulled it back off. Still sitting on the shelf 6 years later🙄
Don't blame you for that decision. They threw a bandaid at an open wound that clearly needed stitches haha
😂 Oh yeah that's an engineer... Filing a precision part on his knee held by his Vice like hand 👌
Spot on!!
In another vid I think you mentioned using the Boyesen RAD valve but this bike has the V-force. Not sure if you already went into any detail about it but I'd be interested to hear your opinion on the two. Also....have you considered a steel clutch basket? Somebody makes one but can't remember who....functions like a flywheel weight. Pretty durable too.
I've mentioned the steel basket multiple times here now in the comments haha. And good eye on the reeds, I'm catching up on older content. This is actually before I got the chance to test anything from Boyesen. They came up with a 'hard enduro' specific reed block. Plus they have extra fancy doodads I can use on the bike as well.
I know you said you were more than likely the only person with that set up in the USA...but do you know what the cost of it would be for the public?? We can file stuff too lol.
They’re 697 euro on their website. I got a discount and paid for $66 in shipping
That clutch arm is the same on my rm250. I'm not keen on it with my magura and think that shackle bit should be bushed to the arm, mostly because it looks jank. However, I like the feel with my rm because the cam part (bit that pushes onto the actuating rod) is worn so the feel is quite linear. I have a non worn cam and I don't like the sudden break feel of the clutch.
I ve used clutch weights also they do help just not the same as flywheel weights, but they don’t make them for yzs , I think the heavier clutch basket will work
Steel basket?
Not exactly the way I thought that was going to end
You need a JIS screwdriver like a Vessel so those chain guard screw heads don't further damaged. They may look like Phillip but they aren't.
You can just grind about 1mm off the end of a Phillips and not be hamfisted. it's near enough.
I do have it in my toolbox at home. Makes the world of a difference
I need to know the plan for your yz250fx enduro cross bike… I hate my cable clutch on my yz250f and I’m excited to see and copy your solution!
Is it possible that you can put the flywheel in before the actuator
You make a joke about the Europeans appreciating measurements in metric, but i think you'll find it's basically the whole rest of the world... Please at least show the conversion for us! 😂
if you put the weight on before putting the hydrologic cylinder on would it clear afterwards
the weight still comes out a hair too far.
How will I like this bike coming from a 2009 yz450? I don’t race just ride around and trail ride with my son. Some dirt road ripping too lol
Would probably be a lot easier to ride than your 450.
Cody is the Magura worth it? Obviously not going to be as good as the Brembo from Valentini but does it feel a lot better than the stock cable clutch? Looking to upgrade but some people say it’s not worth it and I know you run it on your fisch moto e start bike
I'm still not sold on the magura. Just got a 10.5mm Magura to test to see if that helps. I still say cable for now.
@codywebb2 have you considered the righteous stunt clutch easy pull for the cable? They are pretty solid
Any thoughts on adding a weight to the clutch?
Looking into a steel basket!
what about clutch weights, do they make them and would it work?
I'm looking into getting a steel basket to make up for the weight I lost in the flywheel
@@codywebb2Who makes a steel basket, Hinson?
@@evr-mr3cpyea most likely Hinson
@Cody is that a 140 tire on there? Or 120? It looks so beefy lop
110
Ok where can i buy that hydraulic clutch? Take my money.
Can you run the e start with this clutch
I left it in the comments. They want me to distribute them, but I don't know if I'm ready for that
It doesn't matter where the weight is on the flywheel. As long as its balanced. its inertia. The long arm analogy is right, until its in motion. Then its just 2 spinning masses. Your probably right that when you kick the thing, it takes a bit more to swing around the outside weights. but as soon as its in motion, your not SPINING it, you are relying on its conservation of momentum. That extra weight while it takes more to kick through the compression stroke, it has more momentum to get through the next.
Moment of inertia: “a quantity expressing a body's tendency to resist angular acceleration. It is the sum of the products of the mass of each particle in the body with the square of its distance from the axis of rotation.” The further away the mass is from the axis of rotation, the greater the moment of inertia.