anyone familiar with the Keihin CV's???? - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 33 (permalink) Old 06-30-2009, 12:08 AM Thread Starter
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anyone familiar with the Keihin CV's????

On my 81 kz305, it has two Keihin CV 32s. If anyone has any exp with these please help. I have no power after 4,000 rpm. I pulled them off today, and under the diaphram cover, the rubber boot with the pistion and spring that reacts to vaccuum was torn in 2 places. If this leaks, will it not draw more fuel for the higher demand that the engine needs at these higher speeds? I also cleaned every jet needle and any small passage way i could find. I dont want to put this back together until i get new diaphrams for both carbs. I want to do this once.

1986 Vn750
18,800 miles, and counting
Bone Stock
New cam chain tentioners
all fluids changed
Spline Lube
windshield
Engine Guard
B-stone S11 RWL-stock sizes
*wanted*
New grips

2001 Vn750
13,100 miles, and counting
spline lube
Bridgestone S11 100/90
Shinko 170/80
rear end oil change
aftermarket mirrors
windshield
otherwise all stock
*anticipated mods*
Engine Guard
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post #2 of 33 (permalink) Old 06-30-2009, 12:30 AM
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Quote:
Originally Posted by 1986vn750 View Post
On my 81 kz305, it has two Keihin CV 32s. If anyone has any exp with these please help. I have no power after 4,000 rpm. I pulled them off today, and under the diaphram cover, the rubber boot with the pistion and spring that reacts to vaccuum was torn in 2 places. If this leaks, will it not draw more fuel for the higher demand that the engine needs at these higher speeds? I also cleaned every jet needle and any small passage way i could find. I dont want to put this back together until i get new diaphrams for both carbs. I want to do this once.
I think with the new diaphragms that you problems will be solved t lower throttle openings an engine produces more vacuum is probably why it ran up to 4000 but at that engine speed vacuum is dropping off on the side of the diaphragm that over comes the spring and with the cracks it wasn't enough to keep the slides up,if you have cleaned all fuel and air passages and set your float level correctly and replace the gaskets and diaphragms your carbs should feed you engine properly if the ignition system and compression are all right and if the bike has been sitting awhile,check for airbox and exhaust restrictions too like mud daubers nests and other obstructions.Hope this helps.




If you see it on my bike I did it
VROC#30324
92 vn750(sold)
Current ride 05 1500 Classic FI
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post #3 of 33 (permalink) Old 06-30-2009, 12:44 AM Thread Starter
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Yes it does. It runs GREAT up to about 4,000. So i will order those two, and my idle jet was clogged completely, so that explains why it would idle so high, it had no fuel. Also, i cant figure out how to get the old boots off of the piston. i hope i dont have to buy two new pistons with the rubber boots on them. they are $80 a piece.

1986 Vn750
18,800 miles, and counting
Bone Stock
New cam chain tentioners
all fluids changed
Spline Lube
windshield
Engine Guard
B-stone S11 RWL-stock sizes
*wanted*
New grips

2001 Vn750
13,100 miles, and counting
spline lube
Bridgestone S11 100/90
Shinko 170/80
rear end oil change
aftermarket mirrors
windshield
otherwise all stock
*anticipated mods*
Engine Guard
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post #4 of 33 (permalink) Old 06-30-2009, 12:47 AM Thread Starter
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also, any tips on setting the float level? IM not sure they are right, and would like to check

1986 Vn750
18,800 miles, and counting
Bone Stock
New cam chain tentioners
all fluids changed
Spline Lube
windshield
Engine Guard
B-stone S11 RWL-stock sizes
*wanted*
New grips

2001 Vn750
13,100 miles, and counting
spline lube
Bridgestone S11 100/90
Shinko 170/80
rear end oil change
aftermarket mirrors
windshield
otherwise all stock
*anticipated mods*
Engine Guard
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post #5 of 33 (permalink) Old 06-30-2009, 12:54 AM Thread Starter
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bad news, [URL="http://www.bikebandit.com/houseofmotorcycles/kawasaki-motorcycle-305-csr-kz305a1-us-1981/o/m3212"]http://www.bikebandit.com/houseofmotorcycles/kawasaki-motorcycle-305-csr-kz305a1-us-1981/o/m3212[/URL The exploded view shows the vaccuum piston as part # 43028 and its $87.00 and the rubber diaphram is attached. i need two!!!! oooof. there has to be a way to remove the old ones, and maybe kawasaki can get just the boot.

1986 Vn750
18,800 miles, and counting
Bone Stock
New cam chain tentioners
all fluids changed
Spline Lube
windshield
Engine Guard
B-stone S11 RWL-stock sizes
*wanted*
New grips

2001 Vn750
13,100 miles, and counting
spline lube
Bridgestone S11 100/90
Shinko 170/80
rear end oil change
aftermarket mirrors
windshield
otherwise all stock
*anticipated mods*
Engine Guard
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post #6 of 33 (permalink) Old 06-30-2009, 01:11 AM
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if have manual for your bike you can look and it should give you a float level setting ,if not Go to Keihin'S site and see if you can find the spec on it.ifoyu just pushed the pins out and removed the floats an needles at he same time and didn't bend the little tang that the needle sits on on the float the should still be set.and check cheap cycle parts .com and see what your parts are going to be on there and you can google your carb nd its brand and model #are yours CV32 I think you said and you will find several sites on CV carbs an you will see other bikes that used the same carb and may find a set on ebay or elswhere for cheap.




If you see it on my bike I did it
VROC#30324
92 vn750(sold)
Current ride 05 1500 Classic FI
lovin' the new scoot



Quote:
"When all is said and done,usually more is said than done" UNK
Click on one x and drag to the other to read between them.

Psalm 40:1...
XI waited patiently for the Lord; and he turned unto me, and heard my cry. X
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post #7 of 33 (permalink) Old 06-30-2009, 01:31 AM
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FYI H-D sell the parts for Keihin CVK32 and CVK34 cheaper than Ma Kaw.


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote
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post #8 of 33 (permalink) Old 06-30-2009, 01:53 AM
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how goes it Lance,Have I steered this man right?,I'm Glad you're here I'll go lay down LOL




If you see it on my bike I did it
VROC#30324
92 vn750(sold)
Current ride 05 1500 Classic FI
lovin' the new scoot



Quote:
"When all is said and done,usually more is said than done" UNK
Click on one x and drag to the other to read between them.

Psalm 40:1...
XI waited patiently for the Lord; and he turned unto me, and heard my cry. X
denny6006 is offline  
post #9 of 33 (permalink) Old 06-30-2009, 09:36 AM
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Quote:
Originally Posted by denny6006 View Post
how goes it Lance,Have I steered this man right?,I'm Glad you're here I'll go lay down LOL
It's goin!!! Yes, if his diaphragms are torn that will cause his problems.


85 VN700 "Old Yella"

REBUILT ENGINE
CUSTOM PAINT
VANCE & HINES CRUZERS
EAR SHAVED AND RE-JETTED W/K&N'S
DUNLOP ELITE K591 FRONT & REAR
VOLTMETER
SYNTHETIC BRAKE FLUID
SYNTHETIC OIL & GEAR LUBE
PLEXISTAR 2 WINDSHIELD
SPLINES LUBED
ACCT'S GREASED W/TOC SPRINGS
COASTERD
LEATHER SADDLE BAGS
LEATHER TOOL AND ROLL BAG
PICKUP COILS GAPPED AT .018"
NGK CAP, WIRES, IRIDUMS
BARNETT FRICTION PLATES & SPRINGS
CUSTOM GRIPS, MIRRORS, LEVERS
ORIGINAL STATOR & R/R 14.5v
DEKA MF AGM ETX15L

Best Auto/Moto Insurance | Motorcycle Protection Today | FREE Trade-In Quote

Last edited by lance328; 06-30-2009 at 10:06 AM.
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post #10 of 33 (permalink) Old 06-30-2009, 10:31 AM
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A good friend of mine, and a member here, Wired George, is the carb guru, especially on the KZ's. http://www.wgcarbs.com/
Just an FYI...

Fergy
Kyle, TX VN750.com member #707 VROC#19556
2002 VN1500 Classic
Spline Lube Procedure, with photos, R/R Relocation and Coil Mod
Rusty Tank Cleaning!
Electrical Fault Finding Flowchart
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