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Carb Jetting Question
- mcguest12
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My questions is, should the carbs be jetted different for this type of exhaust. When I am running in 2nd and 3rd gear, it seems to backfire a fair amount on the down shift. It seems like it has excess fuel it is burning off.
Also, the bike runs excellent up around 6000 - 7000 RPMS, at the lowere rpms it seems to hesitate a fair amount on the upshift.
Any help and advice would be great.
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- Nebr_Rex
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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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- mcguest12
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- koolaid_kid
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1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
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- slayer61
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- KZR FLAG RELAY CARRIER #62
koolaid_kid wrote: Rather than rehash the same things, check out this thread . We are covering everything there, you are welcome to join in. I even included a link on how to tune your carbs. Enjoy.
I read the link provided and it is contrary to what Mikuni suggests for tuning a carb. Granted, my resource is for the HS series of carbs, but they suggest tuning from the "bottom-up" rather than from the "top-down" as suggested in your reference. Why would your system start with the main, rather than the pilot circuit as described by www.zodiac.nl/instructions/234862.pdf
Curious minds want to know!
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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- koolaid_kid
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1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
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- slayer61
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- KZR FLAG RELAY CARRIER #62
I have VMs on my RD, Keihin CR Specials on my Suzuki. My wife's little gpz has the first set of CV carbs I've ever had apart. Thanks again for clearing up the difference. Paul
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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- koolaid_kid
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1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
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- slayer61
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- KZR FLAG RELAY CARRIER #62
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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- koolaid_kid
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The VMs were a strange animal; the top was sort of oblong front to back and quite complicated. They were actually the reason I sold my 78 GS750E after only one year of ownership. I was used to my RD where I would slam the throttle open and point to the sky. The GS would fall flat on its face because it needed vacuum to pull the fuel out of the bowl, and when you did that there was no vacuum, hence no fuel, hence no acceleration. That is why the CV came along; when you slam the throttle open, the butterfly valve opens, but the slide opens more slowly, with the vacuum through the hole in the slide pulling the diaphragm up. Much better. I still miss pointing at the sky, though.
1983 GPz 750
810 Wiseco, Kerker, K&N, DynoJet S3, Accel, Progressive, etc.
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- slayer61
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- KZR FLAG RELAY CARRIER #62
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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