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lag
- stonemaster
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- Old Man Rock
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Plug conditions?
Possibly a cable snag but hmmm....
If above good, first thought is the needle clip positions... Can always try a different position....
When riding & holding at steady rpm, say 4500rpm, does it feel like it's surging back & forth a little as if running out of gas?
Same rpm, let go of the throttle and let is snap back into position, pop out the exhaust?
Change to richer clip position & or needle...
BTW... Carb Zipped has all your asking for including OEM VM Tuning manual....
kzrider.com/index.php?option=com_docman&...d&gid=461&Itemid=108
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
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- stonemaster
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- Old Man Rock
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Good luck and let us know how it turns out for you...
OMR
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter
Phoenix, Az
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- Jeff.Saunders
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1) check the valve clearances. If they are off significantly, the bike can run very rough.
2) check ignition timing - esp. the 1/4 & 2/3 are set the same.
3) check carb syncronization - one carb opening ahead of all the others will give a hesitant response.
4) similar to 1) check compression - if you are down on compression on 1 or 2 cylinders the throttle can be sluggish.
www.z1enterprises.com
Z1 Ent on Facebook,
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- Patton
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- KZr Legend
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- Thank you received: 2098
Info from Z1E:
28mm (VM28SC) Z1 & early Z1-A
Jet Needle #3 clip position
Pilot Jet 20.0
Air Screw setting 1 1/2 turns out
28mm (VM28SC) Late Z1-A & all Z1-B
Jet Needle #2 clip position
Pilot Jet 17.5
Air Screw setting 1 1/4 turns out
Would return the jet needle clip to stock position, and retain stock pilot jet size, and return air screw setting to default position. Then proceed from there if finer carb tuning is deemed necessary.
Z1 performed very well off the showroom floor.
Pulling away from idle was strong and steady, absent hesitation or stumble.
Good Fortune!
1973 Z1
KZ900 LTD
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- Patton
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Should see advancer quickly move back and forth as engine rpm is varied by blipping the throttle.
If the advancer is hanging or sticking, it could adversely affect smooth steady pull away from idle.
Advancer may need lube, or both cleaning and lube.
Sometimes an advancer spring may be damaged or weakened.
Good Fortune!
1973 Z1
KZ900 LTD
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- stonemaster
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If not already done, would also assure advancer is functioning properly.
Should see advancer quickly move back and forth as engine rpm is varied by blipping the throttle.
If the advancer is hanging or sticking, it could adversely affect smooth steady pull away from idle.
Advancer may need lube, or both cleaning and lube.
Sometimes an advancer spring may be damaged or weakened.
Good Fortune!
thats the one thing I havent done, valves done, timing done, bench sync'd a .025 on sliders, carbs rebiult, 20 on pilot jets, 117.5 on (not that that matters) thats gotta be it ...
thanx
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- TeK9iNe
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- What did you do!?!
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Motorcycle Shop Owner/Operator
79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors
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- stonemaster
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- stonemaster
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- testarossa
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- Attack life, it's only trying to kill you.
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went for a ride last night, bike ran fine except ... only lags/hesitates off a dead stop, and is more noticeable if I pull out of my driveway going in the uphill direction. Otherwise it runs good. With my past crab fart problems I'm reluctant to move the jet needle clip higher. It is on 4 right now and going to 3 means leaner correct?? I'm afraid it will go back to carb farting again ....opinions ????
Have you done the clear tube test to check fuel levels in your float bowels yet? Accelerating from a dead stop or driving uphill will cause the the fuel to slosh back. Improper float levels might cause the the needle valve to close early due to sloshing effect, thus creating a temporary lean condition. Just a thought.
1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN
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