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Getting sick of my carb situation KZ750 H3
- Setton
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I have a fuel filter and it is no where near time to replace it... what is going on?
Is there some modern carb assembly I could get that's still being manufactured? I saw some Mikunis that are supposed to fit other models of 1982 KZ750, but it didn't list the H model...
I have the stock Keihin CV34 carbs that came with the bike, and they were remanufactured by Wired George, and he did such an amazing job that I'm just dumbfounded. Every time I polish the seats, there never appears to be anything to be making it dirty when I look visually...
I'm starting to get really annoyed...
KZs I own
1982 KZ750-H3 LTD (frame's bent, no longer rideable, RIP)
1982 KZ1100 LTD Shaft (thought it was a Spectre)
1988 KZ1000 Police
1989 KZ1000 Police (basket case)
2002 KZ1000 Police
Non-KZs:
1983 Hondamatic 450
2001 Honda Rebel
I don't understand soup. Put a flower on my nose.
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- SWest
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- 10 22 2014
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Steve
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- martin_csr
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From the 750-4 manual. models w Mikuni BS34 carburetors. 82 R1, 83 L3, 84 KZ700 & 84/85 ZX750A models.
edited to include the R1 & L3. see following reply by Nessism
Mikuni BS32 carbs. 82-83 KZ650-CSR. same airbox as the 750E/H models. same carb holders & airbox ducts.
For more recent carburetors you can probably use the carbs from a 99-2005 ZR750 (ZR7 & ZR7S), but I think they all had Keihins.
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- Nessism
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- Setton
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The Modern Mikinus I found were Mikuni RS34-D21-K RS
I had my tank de-rusted and gelled professionally so there shouldn't be any rust getting through.
I'm using a cone shaped filter and the petcock is vacuum actuated rather than gravity.
KZs I own
1982 KZ750-H3 LTD (frame's bent, no longer rideable, RIP)
1982 KZ1100 LTD Shaft (thought it was a Spectre)
1988 KZ1000 Police
1989 KZ1000 Police (basket case)
2002 KZ1000 Police
Non-KZs:
1983 Hondamatic 450
2001 Honda Rebel
I don't understand soup. Put a flower on my nose.
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- Nessism
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- martin_csr
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From a quick internet search of the RS carburetors. google search = Mikuni RS34-D21-K RS fitment.
other searches may yield more info. such as RS34 fitment or whatever.
mikunioz.com --- Mikuni RS34 ... Excerpts from the description:
Before rushing in and ordering please firstly check your carb spacing and carbie sizes for compatibility (the spacing is listed).
This Mikuni kit comes with the following carb centre to centre spacings for direct fitment to ... ALL, Kawasaki KZ 750. et al.
The OD at the motor end on 34’s is 40mm. OD at the air-cleaner end is 55mm. Front to back length is 100mm
ps: a vacuum petcock is still gravity fed. the vacuum feature basically makes it an automatic fuel valve. engine vacuum actuates a diaphragm to allow fuel to flow by gravity. when the engine stops, a spring returns the diaphragm to the closed position. the diaphragm assy has a plunger w o-ring that plugs a fuel port on the petcock body when the engine is off.
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- KZB2 650
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1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
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- Nessism
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$9.82 each for real deal Keihin needles.
These are cheaper... www.amazon.com/gp/product/B00NO5OMQG/ref...06_s00?ie=UTF8&psc=1
I've used them before and they are passable, but I recommend spending the extra $20 for the Keihin parts.
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- daveo
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Setton wrote: I haven't bent any tangs.
The Modern Mikinus I found were Mikuni RS34-D21-K RS
I had my tank de-rusted and gelled professionally so there shouldn't be any rust getting through.
I'm using a cone shaped filter and the petcock is vacuum actuated rather than gravity.
The RS34's I have develop an occasional drip only when parked at an angle on the side-stand.
IMO the fuel migrates between carbs as it seeks to level, and it eventually breaches the top of the drain tube in the lowest bowl.
It may not leak if the bike sits undisturbed, but if it gets jiggled or moved the slightest amount, then some fuel will inevitably drip. :huh:
1982 KZ1100-A2
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- KZB2 650
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1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
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- Setton
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martin_csr wrote: Before rushing in and ordering please firstly check your carb spacing and carbie sizes for compatibility (the spacing is listed).
This Mikuni kit comes with the following carb centre to centre spacings for direct fitment to ... ALL, Kawasaki KZ 750. et al.
The OD at the motor end on 34’s is 40mm. OD at the air-cleaner end is 55mm. Front to back length is 100mm
So it will fit the H3 then I take it?
I think I'll try Nessism's suggestion to use real keihin needles, first. Then if that doesn't work I'll bite the bullet and buy a set of RS34s... I'd prefer just to get what I have working right, but if that doesn't work, I'd rather have something modern, for which parts are still available.
KZs I own
1982 KZ750-H3 LTD (frame's bent, no longer rideable, RIP)
1982 KZ1100 LTD Shaft (thought it was a Spectre)
1988 KZ1000 Police
1989 KZ1000 Police (basket case)
2002 KZ1000 Police
Non-KZs:
1983 Hondamatic 450
2001 Honda Rebel
I don't understand soup. Put a flower on my nose.
Please Log in or Create an account to join the conversation.