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Discussion Starter #1
ive vaguely mentioned this before guys but after a nice run out with the lads last night i really need to get this sorted .
97 blade dyno jetted yoshi system shortened to stubby .
starts and runs great and from 3k up pulls like a train but under load upto 3k just dont wanna go thats in every gear splutters pops the minute u hit 3500rpm its like a turbos kicked in pulls ya arms off i also noticed i think its lacking top end but as its the oldest bike ive owned and the last was the 03 r1 and 04 busa maybe thats naturel .
bro was behind on his zx9r 2000 and he said i was great till 140 then he started to real me in .
i have new panels forks the lots ready to fit but need to sort this first guys .
 

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ive vaguely mentioned this before guys but after a nice run out with the lads last night i really need to get this sorted .
97 blade dyno jetted yoshi system shortened to stubby .
starts and runs great and from 3k up pulls like a train but under load upto 3k just dont wanna go thats in every gear splutters pops the minute u hit 3500rpm its like a turbos kicked in pulls ya arms off i also noticed i think its lacking top end but as its the oldest bike ive owned and the last was the 03 r1 and 04 busa maybe thats naturel .
bro was behind on his zx9r 2000 and he said i was great till 140 then he started to real me in .
i have new panels forks the lots ready to fit but need to sort this first guys .

Why are you even down that low on the tach if you want to accelerate?
 

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It sounds like your lugging it, it's loading up and then clearing its throat . You've never ridden a carbed bike before, right? I think you may just be used to the better fuel metering you get from EFI. Is this bike new to you, or have you had it awhile and it just started doing this? Like BR asked, what are you doing trying to accelerate below 3000?
 

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Discussion Starter #4
so you all pull away at 4k and just drop the clutch ?? its deff a problem ive had loads of carbed bikes before imagine the same as running out of fuel very spluttery and kangeroo then it goes like stink ??
 

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so you all pull away at 4k and just drop the clutch ?? its deff a problem ive had loads of carbed bikes before imagine the same as running out of fuel very spluttery and kangeroo then it goes like stink ??

If we're accelerating hard we do.
Are you saying that you can't pull away at all under 4000RPM?
 

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Discussion Starter #8
What does this mean?
The floats in the carbs can be set at different heights by adjusting the ring on the needle . And just about pull away if I ride the clutch but its the same in every gear so say a tight bend or corner is an absolute nightmare .
 

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so you all pull away at 4k and just drop the clutch ?? its deff a problem ive had loads of carbed bikes before imagine the same as running out of fuel very spluttery and kangeroo then it goes like stink ??
Meant nothing by my question, just trying to help. In your OP you said it was the oldest bike you had owned, 97 and that the last 2 were '03 and '04. I got from that that everything you owned was FI.
 

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Discussion Starter #10
Meant nothing by my question, just trying to help. In your OP you said it was the oldest bike you had owned, 97 and that the last 2 were '03 and '04. I got from that that everything you owned was FI.
Yes mate I undestand what u mean but its hard trying to explain on sites lol its def not right u know when the older bikes need to go on reserve tank ? Splutter jerk dont wanna move its real bad like that in every gear ONLY under load but when it reaches 3.5k it flys
 

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I'm sure there are a host of things you could do to try and dial that out, or at least make it slightly less bad as you describe. Changing slow jets, needle height, etc. You could do a dyno run and see what it looks like on paper. But to be honest, the above posts are pretty right on with questioning why you are trying to throttle out below 4k rpm. I'm pretty sure when I'm in first or second gear going through a hairpin I'm well above 4k just because I know it's a slug below that. If its as bad as you describe, it may take having the carbs in and out multiple times before you notice any positive gain. Sometimes that's the drawback of a full aftermarket exhaust/jet kit/air filter modification. Not saying you don't have a problem, but past experience dictates this is somewhat normal. Do you know if the gearing has been changed? If the sprockets have been changed you might need to choose a different gear than your used to at the slower speeds. Keep feeding us into.
 

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Discussion Starter #12
Sorry lads but u obviously cant get how bad this is . This is noway normal fro a carbed bike Itotally understand how slow and sluggish these are under 4k this I now a slow and sluggish problem more a pull the clutch in before it stalls . Ill try asking elsewhere thanks anyway lads
 

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The floats in the carbs can be set at different heights by adjusting the ring on the needle . And just about pull away if I ride the clutch but its the same in every gear so say a tight bend or corner is an absolute nightmare .


But why would you be taking tight bends at such low RPM?
 

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Sorry lads but u obviously cant get how bad this is . This is noway normal fro a carbed bike Itotally understand how slow and sluggish these are under 4k this I now a slow and sluggish problem more a pull the clutch in before it stalls . Ill try asking elsewhere thanks anyway lads

We can only help based on the information you supply us.
Can you post a video?
 

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Discussion Starter #16
I could somehow try but as I said its not only underload . Been told by lads from other site def a carb prob most certainly float setting . Running to rich at low revs
 

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Discussion Starter #17
problem sorted now lowerd the needle 1 notch and set mixture tu 2.5 turns feels like a new un ..
 

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problem sorted now lowerd the needle 1 notch and set mixture tu 2.5 turns feels like a new un ..
Brilliant job!! So what position on the needle is your clip?, and where were your fuel screws turned to originally? Once again well done and enjoy the ride!:thumb:
 

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problem sorted now lowerd the needle 1 notch and set mixture tu 2.5 turns feels like a new un ..

Stock needles shouldn't have notches though?
 

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And looking at the fiche it appears the inner and outer carbs use different needle and needle jet?
 
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