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Rough at around 3500 rpm + lean
- TheForumTroll
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-[ KZ700-A1 '84 ]-
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- Patton
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May indeed result from imperfectly clean pilot circuits.TheForumTroll wrote: My (fully stock) 700 is running very rough at around 3500 rpm and up a bit and also seem rather lean. Since it's stock it sounds like carbs just need cleaning right? I'm not at home so I don't have most of my tools. Anything special needed or just ordinary tools most have?
But before tearing into the carbs, would first consider other things such as valve clearances, pilot adjustments, sync, fuel levels (clear tube test), condition of air filter, air leaks, fuel cap venting, kinked fuel line, etc.
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1973 Z1
KZ900 LTD
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- Patton
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TheForumTroll wrote: My (fully stock)... Anything special needed or just ordinary tools most have?
Would want to have on hand --- perfect sized screw drivers, easy-outs, reverse drill bits, Kroil, torch, pressurized carb cleaner spray, new gaskets, eye-wear protection, compressed air supply, magnifying glass, items needed for clear tube test, etc. (because there's just no telling what one may run into during the carb cleaning process).
There's also the possibility of needing new jets, or other replacement carb parts, or carb holders.
Also , removal and replacement of the carbs (from and back onto the engine) can be a pain, especially if contending with old hard air-box hoses (may need a hair dryer).
The parade of horribles seems never-ending.
Visions of SeaFoam dance in my head. :lol:
Good Fortune!
1973 Z1
KZ900 LTD
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- TheForumTroll
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Pilot screw adjustment could help at those high rpm's?
-[ KZ700-A1 '84 ]-
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- Patton
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TheForumTroll wrote: ... Pilot screw adjustment could help at those high rpm's?
It's not so much a matter of rpm as it is the carb throttle position.
The throttle slides may be only slightly cracked open while easily cruising along at 3500 rpm, where the pilot circuit is still influencing the air-fuel mixture.
Would adjust -- in the normal manner -- each pilot screw for the best attainable idle rpm, which may improve smoothness at cruising speeds with the throttle barely cracked open.
If turning the pilot screw fails to produce a noticeable change in idle rpm, there's probably something wrong inside the carb (perhaps an imperfectly clean pilot circuit).
Good Fortune!
1973 Z1
KZ900 LTD
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- TheForumTroll
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-[ KZ700-A1 '84 ]-
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- Tomolu5
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Mine:
04 Honda rebel 250(wifes)
04 GSXR 750(bolt on galore)
98 CBR 600F3(filter, pipe, adjustable cam sprokets, dyno tune)
76 KZ900A (LTD gauge pods, crash bars, LTD(style)pipes, dyna coils and ignition,headwork and mild port cleanup by cavanaugh racing, K&N filter pods, heck I dunno.
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