300hp+ Kawasaki ZH2 Extreme EP4 

How so he has ah zh2

Please post a little bit of that build on your channel

@@ProudMurican_PVT-GR137 I’m going to do a video of the build , some dyno runs and the finished product.

Blow off valve doesn’t give you any kind of performance. I feel like the stock valve sounds better than a bike that whispers to me when engine braking. I’ve been trying to make a bov that does the high pitch noise you hear on turbo civics but it’s hard to get that sound with a supercharger. Nice build tho, bikes at 200hp are nuts as is, but 270+? I bet she rips the concrete apart on the interstate. Badass bro!

@@TheBigChad I know it doesn’t give any performance, but it definitely changed the way the bike sounds. And it looks really good. The bike is the shop now getting a bunch of carbon fiber parts , and a roaring toyz swing arm .

@@chriswade3986 I’m not hating on it at all!! I love the build currently. That swing arm will be sexy af too

I didn't really say it in the video but your exhaust definitely made a big difference to flow once we were able to get some timing into the motor. It is LOUD with the baffle out but I love it & the quality is awesome.

@@extcreat Great hear and regarding the muffler kicking out more due to the use of a single-sided swingarm over the original twin rail we can if you intend on sticking with that spec possibly bring the muffler in by using an H2 or SE/SX link pipe?

Yes you are correct about the cutout,. Realised what I said afterwards.

There's an easter egg in the last 2 seconds of this video 🙂

@@extcreat I think I know the size of this wheel, it exists for the H2, upgrade, 72mm,76mm,78mm, there is the 84mm that has not been tested, just a "prototype", the 76mm is easily above 400 whp, the size of your new sc is 76 mm probably, hshshsshshs

@@extcreat I don't remember the size of the original H2 wheel, something around 68mm, the 72mm rotor already brings big power gains.

@@extcreat if you turbo this bike..... oh my lordy.

We are not currently a dealer sorry, You can purchase through Dandy engines in Australia though.

Nothing to do with the bike, it's the dyno brake releasing , a different technique will show a different result in that area

You need to be careful adding too much ignition timing to these bikes especially when pump fuel, @ 70 deg C your ecu will start pulling timing anyway so there's no point adding more. I'm not going to quote an ignition timing figure you should be using as I don't know your exact fuel & engine setup, Im happy to discuss it further if you email me.

Tensioners are stock, Kawasaki changed the design on these after the early H2, they now work fine, we've not seen any issues running them. Yes the H2 head can be used on a ZH2 but you would need to change the throttle bodies the velocity stacks in the plenum, the exhaust system.

no we are using H2 injectors

Yes we have a different cam to use & yes you are correct about the valve components

@@extcreat love the development work. Nice to see a shop that does things properly take the reigns on Z H2 development.

I would assume it shorten its hugely

We have some cams to go in

That will be happening next year.

Plugs were gapped down, fuel atomisation wasn't the issue.

We can athough there is much more to fitting the Fueltech than just a patch harness, if you are interested you can email us though.

Piston shape and head chamber, these are factors that make the "famous" compression ratio, any small change in one of these points changes the rate drastically, either increasing the rate, or loosening or decreasing the compression rate.

a higher compression ratio, results in higher mid-range torque, lower compression ratio, less torque and longer engine life, H2 spins at 14,000 RPM, and has a ratio of 8.5, h2 sx 11.5 and spins 12k RPM

@@lucasreis7222 thank you Lucas. I didn’t realise such small changes make a big difference. I guess the head is different aswell since we know inlet and exhaust ports are different. I would defo take the higher compression ratio for better fuel economy. I’ve heard H2 owners get 50 miles per tank 💀. I think Kawasaki overdone it slightly by lowering the compression ratio on the H2 a bit too much. They couldn’t have known people would change gears when it was released but maybe being their first forced induction premium bike they didn’t want to take chances. The H2SX is a tourer so they had to increase it otherwise it would lose to other bikes. I want stage 2 or 3 in mine once I got all the money saved but will be seeking a professional in this area to do the tuning.

@@09mantlek H2 is a very sensitive motorcycle to the temperature of the air box, if it gets too hot you lose 15-20 hp easily, in my opinion this h2 project should come with an intercooler, or kawasaki increases the efficiency of the supercharger, today the H2 makes 1.2 - 1.3 bar with original gears, that's a lot, it generates a lot of heat, the ideal was to come from the factory with 0.7 - 0.8 bar, it would generate less heat and keep the same current power.

@@09mantlek if i had a H2/H2 sx and i need a few more hp, i would upgrade the supercharger wheel, original is 68mm size, i would upgrade to 72mm, with original SC gears, you can add +- 30 whp or more, that means making more power and having a lot more efficiency, and I would add an intercooler along with a new fuel pump.

Well we have had them side by side & can see/measure no difference, marketing departments are known for telling lies when they think they can get away with it.

Like a H2R makes 300 hp 😂 thats one of my personal favourite Porkys

🤪😂😂😂 My first thought also, but it soon faded to "When can I buy the kit!!" 🤪