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Jets
- 7879KZ650S
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- timebomb33
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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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- anarki650
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Hope that helps!
09 Kawasaki ER6n
77 kz650b1 cafe rebirth project
"Being shot out of a cannon will always be better than being squeezed out of a tube, that's why God made fast motorcycles..."
Dr. Hunter S. Thompson
Omaha NE
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- 7879KZ650S
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- timebomb33
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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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- Nebr_Rex
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It's not running right. It runs OK, but I have a very slight surge when at a steady throtle
that would be a lean mixture
try 107.5 mains,17.5 pilots and raise the needle 1 groove
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
www.dotheton.com/forum/index.php?topic=39120.0
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- 7879KZ650S
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- anarki650
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09 Kawasaki ER6n
77 kz650b1 cafe rebirth project
"Being shot out of a cannon will always be better than being squeezed out of a tube, that's why God made fast motorcycles..."
Dr. Hunter S. Thompson
Omaha NE
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- 7879KZ650S
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- TeK9iNe
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7879KZ650S wrote:
It's not running right. It runs OK, but I have a very slight surge when at a steady throtle
that would be a lean mixture
try 107.5 mains,17.5 pilots and raise the needle 1 groove
Whoa! If its lean at one point in the throttle circuit, don't change the entire fuel map.
Start with one circuit at a time. Fuel delivery/circuit/jet used is entirely dependant on throttle position.
If the bike is rideable, start by tuning the Main Jets.
Get the bike up to 4th gear early, then full throttle it till a couple thousand before redline.
Do it a couple times to really know how it "feels". then change out your jets for a leaner set (smaller number).
If the bike improves, continue to install smaller jets till there is no mor improvement. Then go back one set of jets.
It works the same in reverse... go larger jets if it improves, then back off one set when no more improvement.
Next, do the needle clip position. Same process, except at half throttle. Move clip up or down, and feel for improvement. Keep position that feels best.
Next, is Pilot Jets. Adjust Mixture screws to stock positions, approx 1.5 turns out form lightly seated.
Same process with selecting jets, except you choose the one that gives you the best launch/off idle snap up to 4000rpm, from stand still. Only using about 1/8th to 1/4 throttle!
Then adjust your mixture screws with a really good tach or vacuum guage.
YES, its going to take some time and cash, and many jets to get it right. When you do, your bike will be a rocket!
Make sure float/fuel levels are correct and NO AIR LEAKS.
Good Luck!
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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- 7879KZ650S
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- Bad Dad
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LOL YEah, its a lot cheaper and easier rejetting a holley 4 barrel, maybe I'll design a manifold to use one of them!LOL
It cost's nothing to adjust the needle position (just time), and I think that's where your problem is...
It'll be worth it... trust me!
76 KZ900LTD
82 GPz750R1
01 VULCAN 800A-CHOPPED
76 IRONHEAD-CHOPPED
77 RD 400 Cafe
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