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Slide Carb Question
- treitz
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18 Jul 2013 18:11 #597160
by treitz
1979 KZ400 - 2-1 Manifold - Mikuni VM34
Slide Carb Question was created by treitz
I have another slide carb question...
I think I know the answer, but I want to see if you guys think I'm on the right track.
If you are cruising at 35mph in 4th gear, RPM's are probably in the 2k range, is the majority of your fuel coming from the needle jet and jet needle?
Pilot is only off of idle, and main is only 4/3-full throttle. So it seams that while cruising the needle jet and jet needs are providing most, if not all of your fuel. Is this correct?
I think I know the answer, but I want to see if you guys think I'm on the right track.
If you are cruising at 35mph in 4th gear, RPM's are probably in the 2k range, is the majority of your fuel coming from the needle jet and jet needle?
Pilot is only off of idle, and main is only 4/3-full throttle. So it seams that while cruising the needle jet and jet needs are providing most, if not all of your fuel. Is this correct?
1979 KZ400 - 2-1 Manifold - Mikuni VM34
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- slayer61
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18 Jul 2013 18:46 #597166
by slayer61
Don't be ridiculous! It's only a flesh wound!
[strike]Wife's little bike... 1984 GPZ 550 Kerker and DynaJet stage I kit[/strike]
Wife's BIG bike......[strike] 1981 GPZ 1100 Kerker and [strike]factory FI[/strike] Mikuni RS34s W/ K&N pods[/strike] SOLD
Replied by slayer61 on topic Slide Carb Question
The carburetor circuit isn't based on rpm, it is based on throttle position. What position is your throttle in to achieve 35 mph in 4th gear?
Don't be ridiculous! It's only a flesh wound!
[strike]Wife's little bike... 1984 GPZ 550 Kerker and DynaJet stage I kit[/strike]
Wife's BIG bike......[strike] 1981 GPZ 1100 Kerker and [strike]factory FI[/strike] Mikuni RS34s W/ K&N pods[/strike] SOLD
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- treitz
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18 Jul 2013 19:08 #597168
by treitz
I would guess somewhere around 1/4 throttle at the most?
1979 KZ400 - 2-1 Manifold - Mikuni VM34
Replied by treitz on topic Slide Carb Question
slayer61 wrote: The carburetor circuit isn't based on rpm, it is based on throttle position. What position is your throttle in to achieve 35 mph in 4th gear?
I would guess somewhere around 1/4 throttle at the most?
1979 KZ400 - 2-1 Manifold - Mikuni VM34
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- slayer61
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18 Jul 2013 20:13 #597174
by slayer61
Don't be ridiculous! It's only a flesh wound!
[strike]Wife's little bike... 1984 GPZ 550 Kerker and DynaJet stage I kit[/strike]
Wife's BIG bike......[strike] 1981 GPZ 1100 Kerker and [strike]factory FI[/strike] Mikuni RS34s W/ K&N pods[/strike] SOLD
Replied by slayer61 on topic Slide Carb Question
At 1/4 throttle your needle jet circuit is in operation.
Don't be ridiculous! It's only a flesh wound!
[strike]Wife's little bike... 1984 GPZ 550 Kerker and DynaJet stage I kit[/strike]
Wife's BIG bike......[strike] 1981 GPZ 1100 Kerker and [strike]factory FI[/strike] Mikuni RS34s W/ K&N pods[/strike] SOLD
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- mtkawboy
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19 Jul 2013 16:44 #597328
by mtkawboy
78-KZ1000/1105, 80 KZ1000, 82 Kawasaki GPZ750, 95 Harley Fatboy, 80 Suzuki GS1100ET, 81 GS1100E parts bike, 83 GS1100SD Katana/1394,78 Yamaha XT500, 81 Yamaha XS650, 78 Yamaha XS650E, 48 Whizzer model J motorbike, 71 Honda CT70H, 71 Honda CT70, 81 IT 250 Yamaha,82 Honda XL100S owned
Replied by mtkawboy on topic Slide Carb Question
You can pretty much mark your throttle lever in 4 positions from idle to WFO and tell what circuit its on. My guess would be a little of the pilot & a little of the needle
78-KZ1000/1105, 80 KZ1000, 82 Kawasaki GPZ750, 95 Harley Fatboy, 80 Suzuki GS1100ET, 81 GS1100E parts bike, 83 GS1100SD Katana/1394,78 Yamaha XT500, 81 Yamaha XS650, 78 Yamaha XS650E, 48 Whizzer model J motorbike, 71 Honda CT70H, 71 Honda CT70, 81 IT 250 Yamaha,82 Honda XL100S owned
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- Patton
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19 Jul 2013 17:21 #597334
by Patton
1973 Z1
KZ900 LTD
Replied by Patton on topic Slide Carb Question
1973 Z1
KZ900 LTD
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- loudhvx
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19 Jul 2013 19:03 #597355
by loudhvx
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
Replied by loudhvx on topic Slide Carb Question
I'd be surprised if you were at 1/4 throttle cruising at 35 MPH.
On the 550's, you can cruise 55 to 60 MPH at 1/16th to 1/8th throttle.
Either way, 1/8 or 1/4 throttle, changing the needle position will have the most affect. The main will affect it slightly at 1/8, and a little more at 1/4.
On the 550's, you can cruise 55 to 60 MPH at 1/16th to 1/8th throttle.
Either way, 1/8 or 1/4 throttle, changing the needle position will have the most affect. The main will affect it slightly at 1/8, and a little more at 1/4.
1981 KZ550 D1 gpz.
Kz550 valve train warning.
Other links.
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- treitz
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20 Jul 2013 00:30 #597402
by treitz
1979 KZ400 - 2-1 Manifold - Mikuni VM34
Replied by treitz on topic Slide Carb Question
Thanks for the input. And I think you're right, it probably is closer to 1/8 to 1/4 throttle.
So I bumped my needle up a notch and it appeared to help a bit. I also realized I was running a colder plug rather than a hotter plug like I thought I was. So I went from a b9es to the stock b7es and it appears to have helped a bit also.
So I bumped my needle up a notch and it appeared to help a bit. I also realized I was running a colder plug rather than a hotter plug like I thought I was. So I went from a b9es to the stock b7es and it appears to have helped a bit also.
1979 KZ400 - 2-1 Manifold - Mikuni VM34
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