1075cc engine tech question

I have a 77 Z1000. Here is a run down of what is in it. I need help from anyone who has ever built their engine like this:
1075cc, 10.25:1 compression, A P E .410 cams with 266 degree duration, mild street port, cams timed to I believe 110 degrees as per Greg Cope recommendation, Kerker 4-1 with no baffle,Dyna S ignition, Dyna coils.
I need to know what to expect as far as engine idle is concerned. As it is it will crank and warm up fine but as soon as you cut the choke off it dies unless it is idled up to 1500 RPM and above.

did you go thru the carbs at the same time as you built the engine because it sounds to me like you have plugged pilot circuits.

Yes, and two different sets of carbs have been tried, and the same results each time. However, so far I have used the set ups recommended by the so called pros, and that has been my results. What is being used is Mikuni 29mm smoothbores, with 120 mains, 17.5 pilots, 1.0 air screws.
I was mainly wondering if anyone had built their engine up like this before, and what settings they may have used.
I have some 35 pilots coming soon, and still have the old 25s. I also stil have the old .9 airscrews. I am thinking it is in the carburetion, but maybe someone who has built their engine like this before has more insight. I hate to sound like a novice, but I have never had an engine this modded up before. I also do not run the factory airbox, but I used K&N pods.

I had the same problem (carbs were right but wouldn't idle). I fixed my problem by retarding the timing.

Yours seems a little high but someone with a little more knowledge can chime in.

-Scott

I had the same problem on my bike which has avery similar setup to yours. Went away when I synced the carbs.

BTW, I have never gotten the hang of syncing the carbs on my KZ with vacuum guages. I simply bench-sync them with 4 ball bearings, get them to all fall through at the same time as I turn the idle adjuster in.

-Dave

i had basically the same engine with smaller cams and had the same EXACT problem you have ....three diff sets of carbs , played with timing, different jets,etc , etc....drove me frackin nuts
my problem, and i suspect yours, was with the cam timing...to make a long story short, i was 28 pins apart , but i didnt set the mark for the exhaust right at the edge of the head...itwas a little high, so i was running them out of phase....tdc wasnt really tdc....i dont know if that makes sense.....the bike ran well down the road, but wouldnt idle below like 1600...any attempt to set it lower, and it just fell like a rock and died.....i would pull the cam cover and seriously take a look at the cam timing....hope this helps.....let us know how you make out......keith

Also, make sure the advance unit isn't sticky and hanging up or the springs aren't sacked out. A wandering advance can cause all kinds of funny problems like this, but the bike will run down the road fine b/c at speed, the weights are all the way out and not changing the timing.

-Dave

So far that seems like about the only thing I can look at. The guy that built it kept no records, only said "it was right". I have always wondered about it. I may end up retiming the cams myself. I have the kit and the tools. This is all good info that helps me out. I always did wonder if maybe he had the cams timed too radically. Guess I need to get mu tools out. Dang it too. I have sunk so much money and time into this thing. Well, I love her any way.

Z1000Lover wrote:

Yes, and two different sets of carbs have been tried, and the same results each time. However, so far I have used the set ups recommended by the so called pros, and that has been my results. What is being used is Mikuni 29mm smoothbores, with 120 mains, 17.5 pilots, 1.0 air screws.
I was mainly wondering if anyone had built their engine up like this before, and what settings they may have used.
I have some 35 pilots coming soon, and still have the old 25s. I also stil have the old .9 airscrews. I am thinking it is in the carburetion, but maybe someone who has built their engine like this before has more insight. I hate to sound like a novice, but I have never had an engine this modded up before. I also do not run the factory airbox, but I used K&N pods.

29 smoothies with those jets and air screw should be just right.....i ran the same combo once i got cams straightened out and it was pretty spot on....bike ran and idled well.....

Well, Monty Campbell of California and the famed MaxiCarbs, and Maxi Dwell system, and also the best pipe money can buy for a Z1 called the Capmbell X-Pipe has given me a lot of useful tips. HIs suggestions are so far the best I have had anyone give me so far.

Z1000Lover wrote:

Well, Monty Campbell of California and the famed MaxiCarbs, and Maxi Dwell system, and also the best pipe money can buy for a Z1 called the Capmbell X-Pipe has given me a lot of useful tips. HIs suggestions are so far the best I have had anyone give me so far.

so where do you stand and whats the verdict?

Well, I am gonna recheck the timing first. Campbell is an expert on these things. He suggests marking the timing marks with chalk so they can be seen easier. He has told me where the marks should be at 2500 RPM. That is my next step. After that if the problem persists he suggests a compression test. Only after that if the problem still persists the next step is to check valve lash. Most of these things I had an idea that they could be it, BUT, it is his suggestion that we eliminate what he calls "the stupid things" first. So that is where I am right now.