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ZX 4R is coming to the USA

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#141 ·
ME-Motorsports said:
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Awesome! My plan was that when we get ours at TST Industries I was going to take out the ECU and send it to you but I guess if you're already planning on getting a zx4r as well I may not need to do that. I will definitely want a harness for it as soon as you guys have it available! 😬
 
#143 · (Edited)
They can't publicly introduce with much fanfare, a premium-priced small displacement halo niche bike, while taking deposits with first arrivals being just 2 months away, and feign ignorance claiming, "Gosh we don't know the actual engine output specs!" without getting grief. That's just embarrassing and unprofessional, imho.
 
#144 ·
Boomerlcd said:
I wouldnt mind riding it around for a year with a crap ecu tune to maintain the warranty. Id give it a flash for its first birthday though. Man I feel like I am talking myself into this thing more and more.... the wife is gonna hate me.
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Another option if you're that worried about it is to buy another stock ECU and then if you ever have to take it to the dealer you swap the ecu's. Then you don't have to flash it back and forth. It'll just be a higher cost up front because you have to buy another ECU but it would save you in the long run if you actually have to do it a couple of times. And then eventually you can sell that spare ECU once you decide you don't need it anymore after the warranty expires for example. The tough part will probably be finding a stock ECU so early on, unless you buy
new from Kawasaki.
 
#145 ·
sbk1198 said:
Another option if you're that worried about it is to buy another stock ECU and then if you ever have to take it to the dealer you swap the ecu's. Then you don't have to flash it back and forth. It'll just be a higher cost up front because you have to buy another ECU but it would save you in the long run if you actually have to do it a couple of times. And then eventually you can sell that spare ECU once you decide you don't need it anymore after the warranty expires for example. The tough part will probably be finding a stock ECU so early on, unless you buy
new from Kawasaki.
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So now you would be pushing the cost into 5 figures. Don't get me wrong, this is a nice bike, but the performance is pretty hard to justify at over $10k and still needing modification.
 
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#146 ·
sbk1198 said:
Another option if you're that worried about it is to buy another stock ECU and then if you ever have to take it to the dealer you swap the ecu's. Then you don't have to flash it back and forth. It'll just be a higher cost up front because you have to buy another ECU but it would save you in the long run if you actually have to do it a couple of times. And then eventually you can sell that spare ECU once you decide you don't need it anymore after the warranty expires for example. The tough part will probably be finding a stock ECU so early on, unless you buy
new from Kawasaki.
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That's exactly what I did with my 400 and bought a spare to ride while the other was sent off for tuning.

Did the same with my car ecu as well so if anything went wrong I had a stock ecu to drive the car. 😜

I've even got a Veloster turbo ecu, tried, and tested to make sure it worked with my non turbo Hyundai Accent so once I do my veloster turbo engine and tranny swap Id be set. 😈 But that's another forum so you get the point of being prepared and know what you're doing.. 😁
 
#147 ·
invenio said:
So now you would be pushing the cost into 5 figures. Don't get me wrong, this is a nice bike, but the performance is pretty hard to justify at over $10k and still needing modification.
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it's already into 5-figures as it is lol...by the time you pay the taxes it's already over 10k. Or by the time you get even a slip-on exhaust or pretty much any mod, you're into 5 figures lol

Also I only suggested getting a flash right away if the rumor mentioned is true that the bike is very limited from the factory. And that is not a new concept. Honda is pretty notorious for doing stuff like that and they did it with that special edition MotoGP replica bike, the RCV213 that they came out with several years ago, which was restricted to a pathetic 150 hp or less, I can't remember exactly now, despite being a MotoGP replica bike which had the potential to be well over 230 hp. Not to mention it cost over $100,000!
 
#148 ·
sbk1198 said:
My plan was that when we get ours at TST Industries I was going to take out the ECU and send it to you but I guess if you're already planning on getting a zx4r as well I may not need to do that.
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Still may have to if you have a different part number than my bike's ECU. These models we have to hook up to specific ECU pins and read them out as the KDS connector doesn't have direct lines to the pins on the ECU we use to dump the data out of them. So for each different part number out there, we need a read of that specific ECU part number.
 
#149 ·
ME-Motorsports said:
Still may have to if you have a different part number than my bike's ECU. These models we have to hook up to specific ECU pins and read them out as the KDS connector doesn't have direct lines to the pins on the ECU we use to dump the data out of them. So for each different part number out there, we need a read of that specific ECU part number.
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Is it to make sure they're the same or what? For the N400 for example there are 2 known part numbers in the US, but they are interchangeable it seems. In other words I used the bin file definition from one of them and flashed the other one with no issues. Same for the new 2023 model.
 
#150 ·
sbk1198 said:
Is it to make sure they're the same or what? For the N400 for example there are 2 known part numbers in the US, but they are interchangeable it seems. In other words I used the bin file definition from one of them and flashed the other one with no issues. Same for the new 2023 model.
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No, to provide complete coverage. Some models you can get away using different part numbers, other models that's a complete no-go.
 
#152 · (Edited)
Has anyone else punched in the Owner's Manual gear ratios into GearingCommander. It'll bang 16K in 1st gear below 60 mph, but after that it's breaking all speed limits in 2nd, and goes to 162 mph (by the numbers) in 6th gear, quite tall gearing. Definitely shrunk down ZX6R track gearing, not short Ninja 650 street gearing.

Edit: I intended that "by the numbers" would convey the point was concerning the raw numbers / ratios / relative gearing (and not about achievable top speed which doesn't interest me really.)

Interestingly it is exactly Ninja 400 gear ratios, and almost the same overall ratio from engine to tire, quite close. ZX4RR engine just spins higher.
 
#153 ·
xorbe said:
Has anyone else punched in the Owner's Manual gear ratios into GearingCommander. It'll bang 16K in 1st gear below 60 mph, but after that it's breaking all speed limits in 2nd, and goes to 162 mph (by the numbers) in 6th gear, quite tall gearing. Definitely shrunk down ZX6R track gearing, not short Ninja 650 street gearing.

Interestingly it is exactly Ninja 400 gear ratios, and almost the same overall ratio from engine to tire, quite close. ZX4RR engine just spins higher.
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Keep in mind gearing commander is not all that accurate especially once you get up pretty high in speed because it doesn't account for air resistance. What's it say for a ninja 400 at 12,200 rpm? Probably way more than it actually can do. Considering that even a zx6r barely gets to 160mph, I would estimate the ZX4RR to be more on part with some of the 700ish cc twins...so maybe about 135-140 mph stock.
 
#154 ·
I added to my post to clarify my considerations are about gearing, not of top speed. (But yeah GC is only a hand wavy tool for estimations and comparisons and understanding the gearing situation.)
 
#156 ·
#159 ·
ME-Motorsports said:
Hey now, at Daytona that's a different story :)
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Not with stock gearing! And whose bike is that? I know guys like Jason Farrell, Max Angles and Stefano Mesa have pushed over 170 mph in the draft at Daytona. But a stock zx6r with stock gearing will have a hard time hitting 160 even. I think my max on my 2014 zx6r was like 158-159 at Daytona....with an aftermarket exhaust and ECU flash, and Daytona gearing. That was without a draft and I'm a big boy though which doesn't help. It takes quite a bit to make a 600 go over 170 mph without a draft.
 
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