Author Topic: yikes! cam lobe pitting  (Read 922 times)

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Offline batboy

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Re: yikes! cam lobe pitting
« Reply #25 on: July 05, 2019, 11:22:41 pm »
I got the bike back together and it fired right up. Yippee! It idled and ran smooth. Rode it up the road and back, very gently.  I'll take it for a longer test ride in the morning.
1988 Kawasaki Concours ZG1000 - Ninja Edition
Bike has the usual accessories and modifications

Offline Bud

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Re: yikes! cam lobe pitting
« Reply #26 on: July 06, 2019, 12:22:21 am »
Gotta love that! :great:
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Offline batboy

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Re: yikes! cam lobe pitting
« Reply #27 on: July 06, 2019, 11:59:10 pm »
To recap, I went ahead and installed the ZX1000A intake cam (pits and all) using the square holes on the timing chain sprocket. The stock ZG1000 exhaust cam was paired up with the ZX1000A intake cam. I went for a test ride today. So far, I have not twisted the throttle much past 6k rpm.  I want to get my wideband working before I start thrashing the bike too much.

1988 Kawasaki Concours ZG1000 - Ninja Edition
Bike has the usual accessories and modifications

Offline DC Concours

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Re: yikes! cam lobe pitting
« Reply #28 on: July 06, 2019, 11:59:53 pm »
I got the bike back together and it fired right up. Yippee! It idled and ran smooth. Rode it up the road and back, very gently.  I'll take it for a longer test ride in the morning.

Do you see a difference in performance?

Offline batboy

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Re: yikes! cam lobe pitting
« Reply #29 on: July 07, 2019, 12:29:32 am »
My butt dyno thought it was about the same as before. Like I said, I didn't go above 6k rpm which is where you'd expect to feel the gains. I had been told that I'd lose torque with this cam. But, I was pleasantly surprised that the mid range grunt was still there. I think maybe the ninja intake cam paired with the C-10 exhaust cam is the difference in keeping the overlap down to a dull roar.

Stock C-10 cams has an overlap of 75*, ZX1000A cams = 85*, and ZX intake with ZG exhaust is about 77.5* overlap.

Steve says this on his website:

Quote
In the past I have run ZX1000 cams and combinations of ZX1000 and ZG1000 cams. I have tried many different valve timings, and this exercise was the development for the advanced cam sprocket I offer.

Steve also said this in a post I found:

Quote
84-85 gpz900; 86-87 zx1000A. You'll get more top end, lower rpm roll on's suffer. Definitely use one of my advanced sprockets on the exhaust and the round holes on the intake, OR the connie Ex cam and zx int cam is a nice combo. Not so much midrange loss, and still +7 - 8 hp up top

I will start a new thread for the rest of my performance mods (36mm carbs, headers, and tuning).
1988 Kawasaki Concours ZG1000 - Ninja Edition
Bike has the usual accessories and modifications

Offline Daytona_Mike

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Re: yikes! cam lobe pitting
« Reply #30 on: July 08, 2019, 04:31:06 pm »
awesome :)  Glad to hear it is coming along. Keep us posted. (following).. :beerchug:
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