Finally got my z1 out for her 1st shake down run

Well i woke up extra early today, went to my friends house, got the tires mounted and on the bike, got the front callipers blead.....what a pain that was. Any way, i started the bike up, let it warm up really good, then i went on my way. It ran flawlessly.....except for when i was in 1st gear. I was sitting at a light it turned green, so i layed into it hard and left a nice tire mark at the light . I noticed if i let off the throttle in 1st gear when im at a higher rmp like 5500 or above it will make a crackling/popping noise out of the exhaust. It won't do it in any other gear.....no matter how hard or light i accelerate. Any ideas on what is causing this? Is it normal? Should i be concerned? The bike has the stock z1 903cc motor, 1979 kz 1000 head with the valve cover and the reed covers that have an vacume hose in between them. It has i belive a set of 26mm fresh and clean carbs on there, pod air filters, and a vance and hines 4 into 1 sidewinder exhaust with the competition baffle. Im not sure what the jets are that is in them, but i got them from member roy-b-boy-b, he said they were for a bigger motor bike with header and pods. I will pull the carbs when iget a chance to get the #'s on the jets. I will also pull the plugs to get a reading on them. This thing pulls like a freight train and runs like a raped ape.........just that popping is making me go craxy...........thanks, jim

Hey Jim it's a little different from the 400 isn't it? :laugh: Check your plugs for a lean condition. Does your exhaust have a baffle in it? If not you may have to put up with the popping.

I think the jets are 20/117 or 20/ 115. Roy

I wouldn't worry about it popping in first gear only that is a fast decelleration:laugh:

very nice......now a video is in order i believe.....good work and way to stay on target....we knew youd get er running....peace craig

Way to go, it feels good doesn't it. I think the popping is just the motor slowing down because of the gearing not letting it rev down.
Mark

Great to hear you got it up and running good. All my bikes pop like that, just put a sidewinder on my buddy's 77 1000, and it pops like that too.

Ah don't worry about breaking her in Jim just beat her like a red headed step-child why don't you. Nothing like a little love for your long time friend and companion.

You mean to tell me you put carbs on the bike without knowing what the jetting was??? Your bike is going to run like a molested chimp in comparison to mine if you don't do things right.:huh: Most likely your bike is running lean.

I guaraneee the carbs are not lean. I never ran a lean carb in my life.:silly:

Before i installed them i popped the bowls and i thought they would be too rich with his old set up. Roy

cool when your work pays off huh?....have fun.....

oldkaws4ever wrote:

Well i woke up extra early today, went to my friends house, got the tires mounted and on the bike, got the front callipers blead.....what a pain that was. Any way, i started the bike up, let it warm up really good, then i went on my way. It ran flawlessly.....except for when i was in 1st gear. I was sitting at a light it turned green, so i layed into it hard and left a nice tire mark at the light . I noticed if i let off the throttle in 1st gear when im at a higher rmp like 5500 or above it will make a crackling/popping noise out of the exhaust. It won't do it in any other gear.....no matter how hard or light i accelerate. Any ideas on what is causing this? Is it normal? Should i be concerned? The bike has the stock z1 903cc motor, 1979 kz 1000 head with the valve cover and the reed covers that have an vacume hose in between them. It has i belive a set of 26mm fresh and clean carbs on there, pod air filters, and a vance and hines 4 into 1 sidewinder exhaust with the competition baffle. Im not sure what the jets are that is in them, but i got them from member roy-b-boy-b, he said they were for a bigger motor bike with header and pods. I will pull the carbs when iget a chance to get the #'s on the jets. I will also pull the plugs to get a reading on them. This thing pulls like a freight train and runs like a raped ape.........just that popping is making me go craxy...........thanks, jim

i have the comp baffle in a hance and hines....they are noisy....i dont get a lean POP, just that raspy decel note that lets you know you are halfway to no baffle....:laugh: