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Non-adjustable pilot mixture screws on KZ750n?
- sakiguy
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17 Dec 2009 20:30 #339580
by sakiguy
1983 KZ750 N2 Shaft
Non-adjustable pilot mixture screws on KZ750n? was created by sakiguy
82-83 kz750n versions have non-adjustable pilot mixture screws according to the manual. I am puzzled, because I though I would have to adjust these.
1983 KZ750 N2 Shaft
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- timebomb33
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17 Dec 2009 20:38 - 17 Dec 2009 20:38 #339583
by timebomb33
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
Replied by timebomb33 on topic Non-adjustable pilot mixture screws on KZ750n?
they are covered by a small welsh plug on smog controlled bikes all you need to do is drill out the center of the plug with a small bit then screw a small sheet metal screw into it and grab a hold with a pair of pliers the pull it out. the fuel screw is located underneath the carb on the intake manifold side. then adjust away as required.
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
Last edit: 17 Dec 2009 20:38 by timebomb33.
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- sakiguy
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17 Dec 2009 20:48 #339585
by sakiguy
1983 KZ750 N2 Shaft
Replied by sakiguy on topic Non-adjustable pilot mixture screws on KZ750n?
Then why in the world would the service manual say non-adjustable? Don't you find that odd?
1983 KZ750 N2 Shaft
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17 Dec 2009 20:52 #339587
by timebomb33
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
Replied by timebomb33 on topic Non-adjustable pilot mixture screws on KZ750n?
they are non adjustable until you pull that welsh plug they did it to prevent people from making changes that could affect emissions.
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
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17 Dec 2009 20:59 - 17 Dec 2009 21:00 #339591
by sakiguy
1983 KZ750 N2 Shaft
Replied by sakiguy on topic Non-adjustable pilot mixture screws on KZ750n?
Alright...another question...I should turn the pilot screws in and count the number of turns right just to get an idea of the factory setting I assume?
Also I've been advised to adjust the mixture screw on each cylinder until I get the highest reading for each cylinder on the carbtune pro. Does that sound about right?
Not sure how I am going to drill the ones in the middle to get to the pilot screw, as the carbs are on the bike.
Also I've been advised to adjust the mixture screw on each cylinder until I get the highest reading for each cylinder on the carbtune pro. Does that sound about right?
Not sure how I am going to drill the ones in the middle to get to the pilot screw, as the carbs are on the bike.
1983 KZ750 N2 Shaft
Last edit: 17 Dec 2009 21:00 by sakiguy.
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17 Dec 2009 21:06 #339594
by timebomb33
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
Replied by timebomb33 on topic Non-adjustable pilot mixture screws on KZ750n?
turn them in until they lightly seat not any more than that as you could damage both the adjuster and it's seat. make sure you record how many turns in. stock setting should be 1 1/2 to 1 3/4 turns that should be a good place to start. i have nevr used the carbtune myself i have always used motion pro manometers or gauges my self so i'm not sure what procedure you would use for it .what i can tell you is this turn each screw out the same amount until it runs as smooth as it cando you have different filters and pipe or any other mods or is it stock.
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
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- TeK9iNe
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18 Dec 2009 11:47 #339665
by TeK9iNe
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
Replied by TeK9iNe on topic Non-adjustable pilot mixture screws on KZ750n?
Good experienced advice...
Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
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19 Dec 2009 13:10 #339849
by sakiguy
1983 KZ750 N2 Shaft
Replied by sakiguy on topic Non-adjustable pilot mixture screws on KZ750n?
Stock air box but I did put a K&N air filter in it.
1983 KZ750 N2 Shaft
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- hugo
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20 Dec 2009 13:21 - 20 Dec 2009 13:26 #340023
by hugo
Replied by hugo on topic Non-adjustable pilot mixture screws on KZ750n?
The manual says they are non-adjustable because the EPA in the US, bans the manufacturers from making the mix adjustment accesible to the citizens, who otherwise might be tinkering and polluting all over.
The manufacturers simply epoxied a cap on the screw wells and called them non-adjustable. You are not supposed to know there are screws under those caps. That is EPA state secret.
I've never used the carbtune, but might be a good idea as basically is a spark plug that reads the mix, and can tell you right away. Other wise, as there are four carbs, you have to adjust by seat of the pants, assuming all carbs are perfectly identical. Then you have to check several weeks later see how your spark plugs are looking.
The manufacturers simply epoxied a cap on the screw wells and called them non-adjustable. You are not supposed to know there are screws under those caps. That is EPA state secret.
I've never used the carbtune, but might be a good idea as basically is a spark plug that reads the mix, and can tell you right away. Other wise, as there are four carbs, you have to adjust by seat of the pants, assuming all carbs are perfectly identical. Then you have to check several weeks later see how your spark plugs are looking.
Last edit: 20 Dec 2009 13:26 by hugo.
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