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ok i know its not a kz butttt
- bearshawk
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her dad got it "running" earlier this summer but running was all, it started barely with choke and then died immediately after choke was off.
we got a new battery, new plugs, great spark to both cylinders, great compression 165 on both.
carbs i figured were the issue, so we dove in together and her taking direction from me did almost all of the work taking the carbs off.
anyway, after about 2 hours we had them SPOTLESS all jets cleaned with spray cleaner and air. bodies soaked in cleaner and then spray and air.
they look great and it started up first second on the starter! wooo
now the question!
bike runs pretty well it idles strong and drives ok but around 5k it bogs down REALLY bad and you just have to throttle through, then you hit 7.5 and it RIPS really hard but its pretty annoying and shes a beginner and i want it to be as close to perfect as possible
the airbox is hooked up correctly, the intake boots are solid with no cracks, BUT the RH exhaust is rusted through at just after the header, its basically not attached. could this cause the midrange engine bog?
any help would be great, i know its not kaw but there is some serious knowlege here so i figured i would ask
1978 kz650 sr- long time project/first bike mostly gone
1979 kz659 sr- new acquisition NEXT project GONE
Both 650s combined to make one great bike! with a new powerplant
it is a 79 frame, 78 front end, both 78 wheels and brakes, 78 body work and a 80' 750-4 motor with gpz 750 cams and a kerker and...
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- Motor Head
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- FIX UP YOUR BIKE RIGHT AND CHEAP
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Did you check for holes in the diaphragms? How about setting the fuel level? Having one side with more back pressure than the other won't help. Can you connect the rusted out area, weld or replace the metal?
Did you check that the ignition timing is correct and advancing smoothly?
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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- bearshawk
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1978 kz650 sr- long time project/first bike mostly gone
1979 kz659 sr- new acquisition NEXT project GONE
Both 650s combined to make one great bike! with a new powerplant
it is a 79 frame, 78 front end, both 78 wheels and brakes, 78 body work and a 80' 750-4 motor with gpz 750 cams and a kerker and...
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- Motor Head
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- FIX UP YOUR BIKE RIGHT AND CHEAP
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Manuals can be had, they are on the net for free download if you search. I just got a Concours full service manual, off of a Russian server, free pdf file.
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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- jeffasaki
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garreneteed
78 Z1R
78 KZ1000
76 KH500 gone
71 HS1B 90
81 GS 1100 gone
80 PE400
02 KLR
Ontario Canada
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- bearshawk
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@jeffasaki ignition advancer you say? perhaps i can just check it out and lube it up before buying a new one! thanks for the tip ill check it out tomorrow
1978 kz650 sr- long time project/first bike mostly gone
1979 kz659 sr- new acquisition NEXT project GONE
Both 650s combined to make one great bike! with a new powerplant
it is a 79 frame, 78 front end, both 78 wheels and brakes, 78 body work and a 80' 750-4 motor with gpz 750 cams and a kerker and...
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- bearshawk
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1978 kz650 sr- long time project/first bike mostly gone
1979 kz659 sr- new acquisition NEXT project GONE
Both 650s combined to make one great bike! with a new powerplant
it is a 79 frame, 78 front end, both 78 wheels and brakes, 78 body work and a 80' 750-4 motor with gpz 750 cams and a kerker and...
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- clutch
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- I wish I had a tad more patience to do it better!
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bearshawk wrote: correction it looks like i have electronic ignition and there is no mechanical advancer... hmmm
There may still be a mechanical advancer. My kz 750 has electronic ignition, with a mechanical advancer that hides behind the ignition plate.
Southern Maryland, USA
1980 KZ250 LTD (traded, but still missed)
1982 KZ750 E3 (Cafe Project) (Dyna-S, Dyna Coils, V&H 4-1, K&N Pods, 6 Sigma Jet Kit, Acewell Computer, Woodcraft Clip-ons, Custom Rewire)
1966 A1 Samurai (Restoration Project)
Wish List:
KZ1000 P (For a "touring" bike)
Z1 (need I...
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- testarossa
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Motor Head wrote: What are those in the breakdown then, the cap on top, and the spring, then? Looks like it would have a diaphragm.
Manuals can be had, they are on the net for free download if you search. I just got a Concours full service manual, off of a Russian server, free pdf file.
Those carbs look just like the Kiehin carbs on my CB750F. That thing in the diagram that looks like it should be the slide with the attached diaphragm from a Mikuni CV (#8 points to the cap and piston) is actually a metal piston that fits closely inside the cap. There is a diaphragm but it's small and goes into the side of the carb body. In that diagram it's marked as #14 for the assembly. It's a small diaphragm about the size of a quarter with a spring on top, and then the cap covering that.
1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN
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- testarossa
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- Attack life, it's only trying to kill you.
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1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN
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- Motor Head
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The Flat Spot described should rule out the Accel Pump, as it is for up to about 1/4- 1/3 throttle. I saw the CDI in the parts section. Those vacuum pistons may well be effected by the low back pressure on the one side. Making it lean.
1982 KZ1000LTD K2 Vance & Hines 4-1 ACCEL COILS Added Vetter fairing & Bags. FOX Racing rear Shocks, Braced Swing-arm, Fork Brace, Progressive Fork Springs RT Gold Emulators, APE Valve Springs, 1166 Big Bore kit, RS34's, GPZ cams.
1980 KZ550LTD C1 Stock SOLD Miss it
1979 MAZDA RX7 in the works, 13B...
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- bearshawk
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i will still look for the mechanical advancer and see what i can do about lubing it up, i should probably just take the carbs out again and clean them again and check the rubber on the side that i didnt know existed!
either way ill try everything out that was mentioned here and see what happens
i will also post pictures of the little beauty, it really does look good and everything is original
1978 kz650 sr- long time project/first bike mostly gone
1979 kz659 sr- new acquisition NEXT project GONE
Both 650s combined to make one great bike! with a new powerplant
it is a 79 frame, 78 front end, both 78 wheels and brakes, 78 body work and a 80' 750-4 motor with gpz 750 cams and a kerker and...
Please Log in or Create an account to join the conversation.