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zx4rr redline video 120 mph in 3rd gear

9K views 39 replies 15 participants last post by  xorbe 
#1 ·


This guy sucks at shifting but did that hit 190 kmh in third gear?? That's wild
 
#9 · (Edited)
Wow those indicated speeds are way over even what GearingCommander shows, and that was already crazy long. That would put top of 6th at ~180 mph (indicated), that's wholly unnecessary gearing ... that's 4 gears and 2 overdrives, literally. You'll be able to ride this bike without ever shifting past 2nd gear. This is longer gearing than my 95hp CBR650R. Is 14/48 -> 13/51 even possible?

If any of you missed it, the zx4rr has the exact same Ninja 400's transmission ratios. Which is an odd decision imho.
 
#11 ·
I did have some hopes I could up to third in the twesties. But in 2nd he got to ~138km/h (85mph) right under 15k rpm. Then he shifted into third, landed at 13.5K RPM at 156km/h (96mph). Yeah I would never be able to get to third gear in the twesties.
 
#13 · (Edited)
If we use the 3rd gear 193 kph figure, then in mph it's 66 / 94 / 120 / 145 / 168 / 187. For comparison, the Ninja 650 is 47 / 66 / 85 / 102 / 118 / 133, and a Ninja 400 is an almost identical 47 / 67 / 85 / 103 / 120 / 133. The zx4rr can indicate faster in 3rd than the Ninja 650 can in 5th ... (are they planning on offering a factory supercharger? lol.)

Let's just get all the number out, zx6r is 74 / 95 / 113 / 131 / 148 / 161. And a zx6r with -1/+1 sprockets is 67 / 87 / 103 / 120 / 135 / 147. Very interesting, that.

CBR650R is 63 / 82 / 102 / 124 / 141 / 159.

If you wanted to alter a zx4r to Ninja 400/650 numbers, you would need 13/63 sprockets.
 
#15 ·
Hopefully that is a case of a horribly optimistic speedo, 1-4 should be short, 5 and 6 should be taller gears.
Gearing commander shows 6912 RPM in 6th gear at 70 mph.

Assuming stock gearing, 160/60 tire, and 16,000 RPM, also assuming the ratios specified in the manual are accurate:

1st gear: 57.5 MPH
2nd gear: 82 MPH
3rd gear: 104 MPH
4th gear: 126 MPH
5th gear: 146 MPH
6th gear: 162 MPH

Don't get me wrong, I don't want to be screaming down the highway at 9,000 RPM+ in 6th gear, but those first few gears seem a little tall.. maybe that could be an opportunity for the aftermarket? Shorter transmission gears? I wonder if they geared it so tall because of the RPM limited models.
 
#18 · (Edited)
"Top Speed" video but I didn't see over 195 kph indicated just after 3:00

In some other video, an author stated his friend reached 230 kph (143 mph indicated) @ 87 kg body. Obviously the speedo is reading high. We need KPH vs GPS from one of these PH guys.

I hunted down zx6r numbers, max 162 indicated (same as GC) but 65=60 gps (per YT video), so reality = 149.5 mph top of 6th. Assuming at least the same error for zx4r then 143 = 132 mph at best presumably.

Also, did you notice that when riders shift into 5th at high speed, that's it ... the bike is done accelerating.

 
#21 · (Edited)
Really really hoping that these guys got the same canada gearing and that in america/EU we get a shorter gearing.
"For reasons", I'm suggesting these are the realistic mph at 16K: 55 / 78 / 99 / 120 / 139 / 155. Particularly this aligns 130 mph in 5th at 15k peak power.

Still don't understand why the Mustang video is indicating insane 193 kph / 120 mph top of 3rd. Maybe PH got a 15T/43T Frankenstein bike -- their engine stroke (+0.2mm) is already different than the rest of the world to satisfy their local 401cc freeway law. The bike is not even mentioned on Kawasaki PH website.
 
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