Carb Issues

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Nick Howe
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Carb Issues

Post by Nick Howe »

I have the distinct feeling that I am an idiot and just wasted $120 on a FactoryPro Stage 3 jet kit.
I bought my bike after it had sat forever, yada yada, cleaned the carbs, and then got it to run with the choke on and a little coaxing from the throttle
HOWEVER when I took the bike out around the parking lot, she dies when I pull in the clutch.

Im thinking, its flooded, way too rich, gotta get new emulsion tubes like all the guys on the forum do... or a jet kit, ya that sounds cool
lol
so Im out 120$ and several hours pulling the carbs off, cleaning them again, only to discover that I have 118 mains in, and the old needles look suspiciously like Dynojets....
I think, hell, whatever, probably why it was too lean, Ill just throw the 110 mains in there and itll be great

But wait, I distinctly remember unscrewing a certain screw the first time I "cleaned" the carbs, the screw at the top left of the below picture to be exact, which I found on the wiki while trying to find out where the 118 jet had come fromm...
Image
shiiiiizzer
And Im thinking Im a moron bonkonhead

So, do i try the 110s and see what happens? or do I just put the 118s back on and try to adjust the idle screw?

for reference: It had K&N pods on while sitting and rusting, but those were dead so I threw on some awesome UNI pods, which I am in the process of fabricating velocity stacks for (yes that means I will have to get all the jets right all over again so banghead but whatever)
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sweekster
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Re: Carb Issues

Post by sweekster »

Have you done a dynamic synch yet? Not just bench synching but full on synch with a synch tool? I ask because you don't mention it being done. Give us some more details here. Does it even idle? I can't say that your idiot for buying that jet kit. You have pods and in a lot of cases you need those larger jets to compensate. Going DOWN in size may work against as well. Are you in a high altitude environment? That would be the only reason I can think of that would warrant going to a smaller jet while using pods. If will idle then you are part way there just a matter of a good synch session (even with the jets you have now). Someone else may say something different but that's my my2cents .

Hope it helps
Duane...
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1994 Yamaha FZR 1000 EXUP
Factory Pro Stage 1 Jetting | K&N Filter | Corbin Seat | ProTek Keyless Gas Cap | GSXR Mirrors
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Nick Howe
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Re: Carb Issues

Post by Nick Howe »

It doesn't idle unless the choke is on.
I'm at sea level (San Diego)
No synch has been done on it, I have just bench synced it
I was thinking along the lines of yamaha George that the carbs being more efficient at higher flow rate might warrant the smaller jets.... I'm going to put the 118s back in and see how she goes with just adjusting the idle screw, then try the 110s if warranted but if she's happy at 118 then I'll order a 120 and a 115 to tune her from there.
110 seems like a big jump from 118 tho... Just thinking out loud here
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sweekster
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Re: Carb Issues

Post by sweekster »

Dude...dynamic synch that puppy. Build a tool and make it happen. Bench synching can sometimes work against you. From what you've described that seems to be the case to me. In my opinion, you're making more work and head scratching for yourself if you keep avoiding it and it'll make swapping jets later on much less of a headache. Just saying...
Duane...
Bike:
1994 Yamaha FZR 1000 EXUP
Factory Pro Stage 1 Jetting | K&N Filter | Corbin Seat | ProTek Keyless Gas Cap | GSXR Mirrors
My Thread
Cage:
2005 Saab 9-7x 5.3i Arc AWD

Image


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Nick Howe
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Re: Carb Issues

Post by Nick Howe »

Lol ok you've broken me down, off to the hardware store for tubes and bottles and superglue. My clear coat isn't dry yet anyways :(
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Nick Howe
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Re: Carb Issues

Post by Nick Howe »

It was the idle screw. Made a tool, sync'd em. Still died. Then adjusted idle screw, runs fine. So probably a mixture of both. Then made new pods out of some pity her from home depot isle 9, it's rubber boots meant for water systems running PVC pipes 1.5" id which means the boots accept 2" pipes ie the carb tops
Pics soon
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cowboi
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Re: Carb Issues

Post by cowboi »

Good idea nick. Can't wait to see the pics.
When all other contingencies fail, whatever remains, however improbable, must be the truth......S.Holmes

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