CR Special roundslide carb question.

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CR Special roundslide carb question.

16 Oct 2008 05:58
#242068
My current bike has a set of CR Special round slide carbs on it. My question is, each carb has an "L tube out the left side front of the carb. Is this a vaccuum port, vent port, or overflow? Trying to figure out if these should be capped off or not. Anyone?
current bike:
1982 GPZ-750
past bikes:
1978 Z1-R
1982 KZ-550, 615 kit, cams, head-work
1978 GS-1000 drag bike (younger days fun)

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Re: CR Special roundslide carb question.

16 Oct 2008 07:06
#242084
what part of the carb does the hole communicate with?does it go into the throat of the carb or does it go into the bowl area?if it goes into the throat area where it could be pulling air in it needs capped,if it goes into the bowl area it could be a vent to the atmosphere.i am not familiar with your particular carbs but finding out where the holes are feeding into can help you decide to cap or not.hth.
skiatook,oklahoma 1980 z1r,1978 kz 1000 z1r x 3,
1976 kz 900 x 3
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Re: CR Special roundslide carb question.

16 Oct 2008 09:53
#242110
Looks to be the throat, and does seem to be pulling light vaccuum.
current bike:
1982 GPZ-750
past bikes:
1978 Z1-R
1982 KZ-550, 615 kit, cams, head-work
1978 GS-1000 drag bike (younger days fun)

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  • mark1122
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Re: CR Special roundslide carb question.

17 Oct 2008 18:59
#242337
Have u tried to find a parts diagram? Maybe Sudco or Keihin? someone that sells the carbs online?
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.

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Re: CR Special roundslide carb question.

17 Oct 2008 22:14
#242365
it is a bowl vent it's a black plastic elbow .
1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
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  • The Fish
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Re: CR Special roundslide carb question.

19 Oct 2008 07:31 - 19 Oct 2008 07:32
#242593
These?(under the "CR' Decals)
They are where the choke circuit gets air when it is on. Don't cap them. I dont know why Keihin uses this weird set up.
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Last edit: 19 Oct 2008 07:32 by The Fish. Reason: Picture malfunction

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Re: CR Special roundslide carb question.

19 Oct 2008 07:31
#242594
Tried to find out what it was, but can only find a break-down diagram.
It's a bowl vent? Ok I'll leave it be, thanks
current bike:
1982 GPZ-750
past bikes:
1978 Z1-R
1982 KZ-550, 615 kit, cams, head-work
1978 GS-1000 drag bike (younger days fun)

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Re: CR Special roundslide carb question.

19 Oct 2008 08:15
#242606
Wich bike are u running them on? How do u like them?
76 KZ, frame gusset work,1200CC.Ported by Larry Cavanaugh, 1.5mm.over intakes, Carron Pipe, ZRX12 rear end, and seat,96zx9 front end.
01 CBR600F4i Track bike.
Cobourg, Ont. Can.

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~ (k) / (z)

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  • Old Man Rock
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Re: CR Special roundslide carb question.

19 Oct 2008 09:35 - 19 Oct 2008 09:40
#242620
Everything you need to know and then some...

www.keihin-us.com/am/products/crs.php
www.keihin-us.com/am/products/crs.php
www.carbparts.com/keihin/needles_tuning/keihin_tuning.htm

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923
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.
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Last edit: 19 Oct 2008 09:40 by Old Man Rock.

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Re: CR Special roundslide carb question.

02 Dec 2008 05:47
#250335
I am running them on my GPZ-750. They run strong, but I think I need to drop the needles on setting. The bike occasionally tried to foul the plugs at midrange, but runs hard at low and high rpm's.
current bike:
1982 GPZ-750
past bikes:
1978 Z1-R
1982 KZ-550, 615 kit, cams, head-work
1978 GS-1000 drag bike (younger days fun)

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Re: CR Special roundslide carb question.

02 Dec 2008 05:48
#250336
I am running them on my GPZ-750. They run strong, but I think I need to drop the needles on setting. The bike occasionally tried to foul the plugs at midrange, but runs hard at low and high rpm's.
current bike:
1982 GPZ-750
past bikes:
1978 Z1-R
1982 KZ-550, 615 kit, cams, head-work
1978 GS-1000 drag bike (younger days fun)

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  • babyELR
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Re: CR Special roundslide carb question.

02 Dec 2008 05:48
#250337
I am running them on my GPZ-750. They run strong, but I think I need to drop the needles on setting. The bike occasionally tried to foul the plugs at midrange, but runs hard at low and high rpm's.
current bike:
1982 GPZ-750
past bikes:
1978 Z1-R
1982 KZ-550, 615 kit, cams, head-work
1978 GS-1000 drag bike (younger days fun)

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