Not sure if you've covered it, but when you look in the intake ports on the ZRX/GPZ versus the ZZR, you can see how the downdraft arrangement gives a much better airflow path compared with the horizontal arrangement, nice video btw
That is correct and of course the ZZR being Down draft is much more efficient...,as are the ZZR CVK 40's of the ZZR Versus the CVK 36 carbs of the ZRX. In this video however I wanted to concentrate specifically on the actual combustion chamber capacity of the ZZR 12 head versus the ZRX 12 head.. I had heard many myths and suppositions of the ZZR combustion chamber being "smaller" than the ZRX and to be honest I kind of expected it to be. However as you can see in the video that was not the case and I repeated the measurement twice just to be definitive.. Also you can see in the video I did it in real time so you seen it as I did...and the results speak for themselves... Anyway...,much of the compression increase of the ZZR versus the ZRX appears to be focused around the Pistons themselves and I've covered this in a couple of videos here on my Channel.. Also of course the ZZR makes it's power much further up the rev range etc ......,cam lobes.,duration and profile being different....,(also covered in another of my videos...) Piston crown..,wrist pin location etc.....,even the location of the piston ring Lands are different..ZRX 12 versus ZRX 12.. Not a "smaller" CC within the combustion chamber of the ZZR head like many had claimed.. Anyway...,glad you enjoyed watching and following along.. Thanks again. God bless BG.
14:00: ZRX 17.75cc (compression ratio 10.1:1, displacement 1164cc), ZZR 18.35cc (compression ratio 10.6:1, displacement 1164cc), overall compression volumes would include some additional due to head gasket thickness. Very interesting video though, I was wondering what the main differences in the heads was.
Thank you....👍 Head gaskets would be the same for each head so the differential in CC measurement ZRX 12 Versus ZZR 12 remains the same... Check out my other video comparing the pistons (ZZR Versus ZRX for further information..) BG.
😂......,yep sometimes she has to ask what bike is that part is off in the oven as she needs to make the dinner....😊 Yep Christine is a one off...!! Thanks a million..👌 BG.
The video is very interesting! Something I don't understand: I have USDT in my OKX wallet and I have the recovery phrase. (pride)-(pole)-(obtain)-(together)-(second)-(when)-(future)-(mask)-(review)-(nature)-(potato)-(bulb): How should I convert them into Bitcoin?
Hey Brian, so what does it all mean at the end, the ZRX has maybe 1/4 or 1/3 of a point of compression? Or more? Or would it be less than a couple tenths of a point? How about the glow of each port, any comparisons between the 2 heads? Thanks for the video, very informative. Robert
Hi Robert....,it was just a little investigation (while I have both heads stripped and on the bench) to see if there was any credibility to the claims and counter-claim's on varying message boards I'd read regarding this. Some stating the combustion chamber in the ZZR head was smaller...,some stating they were exactly the same etc.. I wanted to do a live demonstration of them both being measured side by side...,and at least have 'some' measurable data documented regarding this ......as opposed to supposition..,hearsay or otherwise. Likewise with my other videos on this chanel covering related "themes" regarding the ZZR~ZRX 1200 series engine components and how they compare.. Hopefully they will serve as some reference to anyone else perhaps....."wondering".. Glad you found it interesting.... Oh and actually the ZZR has around .5 point Higher compression on account of its pistons which I have covered in another video... Thanks for tuning in..... God bless BG
Great CC of the heads albeit piston head volume gotta be taken into account. No withstanding the ZRX may have been decked?? Who knows but the 6 spd grarbox and bigger cams is a win win.
A very interesting and accurate comparison of the two different Kawasaki heads. Thanks Brian for demonstrating how to measure the differences in cylinder head volumes, 😊👍
Thank you....,I actually expected a different result....,but as you can see I double checked and the results are in. Was an interesting (and revealing ) comparisson.. Thank you for your support.. BG.
Good for you Brian. Well done. That your Mrs. for the use of the kitchen table. She's a keeper.
Not sure if you've covered it, but when you look in the intake ports on the ZRX/GPZ versus the ZZR, you can see how the downdraft arrangement gives a much better airflow path compared with the horizontal arrangement, nice video btw
That is correct and of course the ZZR being Down draft is much more efficient...,as are the ZZR CVK 40's of the ZZR Versus the CVK 36 carbs of the ZRX.
In this video however I wanted to concentrate specifically on the actual combustion chamber capacity of the ZZR 12 head versus the ZRX 12 head..
I had heard many myths and suppositions of the ZZR combustion chamber being "smaller" than the ZRX and to be honest I kind of expected it to be.
However as you can see in the video that was not the case and I repeated the measurement twice just to be definitive..
Also you can see in the video I did it in real time so you seen it as I did...and the results speak for themselves...
Anyway...,much of the compression increase of the ZZR versus the ZRX appears to be focused around the Pistons themselves and I've covered this in a couple of videos here on my Channel..
Also of course the ZZR makes it's power much further up the rev range etc ......,cam lobes.,duration and profile being different....,(also covered in another of my videos...)
Piston crown..,wrist pin location etc.....,even the location of the piston ring Lands are different..ZRX 12 versus ZRX 12..
Not a "smaller" CC within the combustion chamber of the ZZR head like many had claimed..
Anyway...,glad you enjoyed watching and following along..
Thanks again.
God bless
BG.
14:00: ZRX 17.75cc (compression ratio 10.1:1, displacement 1164cc), ZZR 18.35cc (compression ratio 10.6:1, displacement 1164cc), overall compression volumes would include some additional due to head gasket thickness. Very interesting video though, I was wondering what the main differences in the heads was.
Thank you....👍
Head gaskets would be the same for each head so the differential in CC measurement ZRX 12 Versus ZZR 12 remains the same...
Check out my other video comparing the pistons (ZZR Versus ZRX for further information..)
BG.
😂......,yep sometimes she has to ask what bike is that part is off in the oven as she needs to make the dinner....😊
Yep Christine is a one off...!!
Thanks a million..👌
BG.
The video is very interesting! Something I don't understand: I have USDT in my OKX wallet and I have the recovery phrase. (pride)-(pole)-(obtain)-(together)-(second)-(when)-(future)-(mask)-(review)-(nature)-(potato)-(bulb): How should I convert them into Bitcoin?
Hey Brian, so what does it all mean at the end, the ZRX has maybe 1/4 or 1/3 of a point of compression? Or more? Or would it be less than a couple tenths of a point? How about the glow of each port, any comparisons between the 2 heads? Thanks for the video, very informative. Robert
Hi Robert....,it was just a little investigation (while I have both heads stripped and on the bench) to see if there was any credibility to the claims and counter-claim's on varying message boards I'd read regarding this.
Some stating the combustion chamber in the ZZR head was smaller...,some stating they were exactly the same etc..
I wanted to do a live demonstration of them both being measured side by side...,and at least have 'some' measurable data documented regarding this ......as opposed to supposition..,hearsay or otherwise.
Likewise with my other videos on this chanel covering related "themes" regarding the ZZR~ZRX 1200 series engine components and how they compare..
Hopefully they will serve as some reference to anyone else perhaps....."wondering"..
Glad you found it interesting....
Oh and actually the ZZR has around .5 point Higher compression on account of its pistons which I have covered in another video...
Thanks for tuning in.....
God bless
BG
Great CC of the heads albeit piston head volume gotta be taken into account. No withstanding the ZRX may have been decked?? Who knows but the 6 spd grarbox and bigger cams is a win win.
ZRX not decked...(totaly stock..)
Check out my other video comparing ZZR Versus ZRX piston crowns.,wrist pin location etc for further information.
BG.
A very interesting and accurate comparison of the two different Kawasaki heads. Thanks Brian for demonstrating how to measure the differences in cylinder head volumes, 😊👍
Thank you....,I actually expected a different result....,but as you can see I double checked and the results are in.
Was an interesting (and revealing ) comparisson..
Thank you for your support..
BG.